/mandos/release : revision 237.7.502

1

#!/usr/bin/python2.7

1

#!/usr/bin/python

2

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

3

#

3

#

4

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

5

#

5

#

6

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

7

# service publisher, downloaded from

8

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

9

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

10

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

11

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

12

#

12

#

13

# Everything else is

14

15

16

#

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

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

19

21

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

20

22

# (at your option) any later version.

21

23

#

22

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

23

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

24

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

25

# WITHOUT ANY WARRANTY; without even the implied warranty of

24

26

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

25

27

# GNU General Public License for more details.

26

#

28

#

27

29

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

28

# along with this program. If not, see

29

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

30

#

30

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

31

#

31

32

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

32

#

33

#

33

34

35

from __future__ import (division, absolute_import, print_function,

35

36

unicode_literals)

36

37

from future_builtins import *

38

try:

39

from future_builtins import *

40

except ImportError:

41

pass

38

42

39

43

try:

40

44

import SocketServer as socketserver

44

48

import argparse

45

49

import datetime

46

50

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

53

51

try:

54

52

import ConfigParser as configparser

55

53

except ImportError:

82

80

83

81

import dbus

84

82

import dbus.service

85

try:

86

import gobject

87

except ImportError:

88

from gi.repository import GObject as gobject

89

import avahi

83

from gi.repository import GLib

90

84

from dbus.mainloop.glib import DBusGMainLoop

91

85

import ctypes

92

86

import ctypes.util

93

87

import xml.dom.minidom

94

88

import inspect

95

89

90

# Try to find the value of SO_BINDTODEVICE:

96

91

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:

97

94

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

98

95

except AttributeError:

99

96

try:

97

# This is where SO_BINDTODEVICE was up to and including Python

98

# 2.6, and also 3.2:

100

99

from IN import SO_BINDTODEVICE

101

100

except ImportError:

102

SO_BINDTODEVICE = None

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

103

114

104

115

if sys.version_info.major == 2:

105

116

str = unicode

106

117

107

version = "1.6.9"

118

version = "1.7.19"

108

119

stored_state_file = "clients.pickle"

109

120

110

121

logger = logging.getLogger()

114

125

if_nametoindex = ctypes.cdll.LoadLibrary(

115

126

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

116

127

except (OSError, AttributeError):

117

128

118

129

def if_nametoindex(interface):

119

130

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

120

131

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

125

136

return interface_index

126

137

127

138

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

128

155

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

129

156

"""init logger and add loglevel"""

130

157

131

158

global syslogger

132

159

syslogger = (logging.handlers.SysLogHandler(

133

facility = logging.handlers.SysLogHandler.LOG_DAEMON,

134

address = "/dev/log"))

160

facility=logging.handlers.SysLogHandler.LOG_DAEMON,

161

address="/dev/log"))

135

162

syslogger.setFormatter(logging.Formatter

136

163

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

137

164

' %(message)s'))

138

165

logger.addHandler(syslogger)

139

166

140

167

if debug:

141

168

console = logging.StreamHandler()

142

169

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

154

181

155

182

class PGPEngine(object):

156

183

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

157

184

158

185

def __init__(self):

159

186

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

160

198

self.gnupgargs = ['--batch',

161

'--home', self.tempdir,

199

'--homedir', self.tempdir,

162

200

'--force-mdc',

163

'--quiet',

164

'--no-use-agent']

165

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

166

206

def __enter__(self):

167

207

return self

168

208

169

209

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

170

210

self._cleanup()

171

211

return False

172

212

173

213

def __del__(self):

174

214

self._cleanup()

175

215

176

216

def _cleanup(self):

177

217

if self.tempdir is not None:

178

218

# Delete contents of tempdir

179

219

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

180

topdown = False):

220

topdown=False):

181

221

for filename in files:

182

222

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

183

223

for dirname in dirs:

185

225

# Remove tempdir

186

226

os.rmdir(self.tempdir)

187

227

self.tempdir = None

188

228

189

229

def password_encode(self, password):

190

230

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

191

231

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

196

236

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

197

237

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

198

238

return encoded

199

239

200

240

def encrypt(self, data, password):

201

241

passphrase = self.password_encode(password)

202

242

with tempfile.NamedTemporaryFile(

203

243

dir=self.tempdir) as passfile:

204

244

passfile.write(passphrase)

205

245

passfile.flush()

206

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

246

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

207

247

'--passphrase-file',

208

248

passfile.name]

209

249

+ self.gnupgargs,

210

stdin = subprocess.PIPE,

211

stdout = subprocess.PIPE,

212

stderr = subprocess.PIPE)

213

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

250

stdin=subprocess.PIPE,

251

stdout=subprocess.PIPE,

252

stderr=subprocess.PIPE)

253

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

214

254

if proc.returncode != 0:

215

255

raise PGPError(err)

216

256

return ciphertext

217

257

218

258

def decrypt(self, data, password):

219

259

passphrase = self.password_encode(password)

220

260

with tempfile.NamedTemporaryFile(

221

dir = self.tempdir) as passfile:

261

dir=self.tempdir) as passfile:

222

262

passfile.write(passphrase)

223

263

passfile.flush()

224

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

264

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

225

265

'--passphrase-file',

226

266

passfile.name]

227

267

+ self.gnupgargs,

228

stdin = subprocess.PIPE,

229

stdout = subprocess.PIPE,

230

stderr = subprocess.PIPE)

231

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

268

stdin=subprocess.PIPE,

269

stdout=subprocess.PIPE,

270

stderr=subprocess.PIPE)

271

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

232

272

if proc.returncode != 0:

233

273

raise PGPError(err)

234

274

return decrypted_plaintext

235

275

236

276

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

237

304

class AvahiError(Exception):

238

305

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

239

306

self.value = value

251

318

252

319

class AvahiService(object):

253

320

"""An Avahi (Zeroconf) service.

254

321

255

322

Attributes:

256

323

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

257

324

Used to optionally bind to the specified interface.

269

336

server: D-Bus Server

270

337

bus: dbus.SystemBus()

271

338

"""

272

339

273

340

def __init__(self,

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):

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):

284

351

self.interface = interface

285

352

self.name = name

286

353

self.type = servicetype

295

362

self.server = None

296

363

self.bus = bus

297

364

self.entry_group_state_changed_match = None

298

365

299

366

def rename(self, remove=True):

300

367

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

301

368

if self.rename_count >= self.max_renames:

321

388

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

322

389

self.cleanup()

323

390

os._exit(1)

324

391

325

392

def remove(self):

326

393

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

327

394

if self.entry_group_state_changed_match is not None:

329

396

self.entry_group_state_changed_match = None

330

397

if self.group is not None:

331

398

self.group.Reset()

332

399

333

400

def add(self):

334

401

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

335

402

self.remove()

352

419

dbus.UInt16(self.port),

353

420

avahi.string_array_to_txt_array(self.TXT))

354

421

self.group.Commit()

355

422

356

423

def entry_group_state_changed(self, state, error):

357

424

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

358

425

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

359

426

360

427

if state == avahi.ENTRY_GROUP_ESTABLISHED:

361

428

logger.debug("Zeroconf service established.")

362

429

elif state == avahi.ENTRY_GROUP_COLLISION:

366

433

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

367

434

str(error))

368

435

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

369

436

370

437

def cleanup(self):

371

438

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

372

439

if self.group is not None:

377

444

pass

378

445

self.group = None

379

446

self.remove()

380

447

381

448

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

382

449

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

383

450

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

412

479

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

413

480

else:

414

481

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

415

482

416

483

def activate(self):

417

484

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

418

485

if self.server is None:

429

496

class AvahiServiceToSyslog(AvahiService):

430

497

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

431

498

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

432

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

499

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

433

500

syslogger.setFormatter(logging.Formatter(

434

501

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

435

502

.format(self.name)))

436

503

return ret

437

504

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

438

769

def call_pipe(connection, # : multiprocessing.Connection

439

770

func, *args, **kwargs):

440

771

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

441

772

442

773

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

443

774

return value on the provided multiprocessing.Connection.

444

775

"""

445

776

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

446

777

connection.close()

447

778

779

448

780

class Client(object):

449

781

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

450

782

451

783

Attributes:

452

784

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

453

785

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

455

787

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

456

788

to see if the client lives.

457

789

'None' if no process is running.

458

checker_callback_tag: a gobject event source tag, or None

790

checker_callback_tag: a GLib event source tag, or None

459

791

checker_command: string; External command which is run to check

460

792

if client lives. %() expansions are done at

461

793

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

462

794

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

463

checker_initiator_tag: a gobject event source tag, or None

795

checker_initiator_tag: a GLib event source tag, or None

464

796

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

465

797

client_structure: Object describing what attributes a client has

466

798

and is used for storing the client at exit

467

799

current_checker_command: string; current running checker_command

468

disable_initiator_tag: a gobject event source tag, or None

800

disable_initiator_tag: a GLib event source tag, or None

469

801

enabled: bool()

470

802

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

471

803

uniquely identify the client

490

822

disabled, or None

491

823

server_settings: The server_settings dict from main()

492

824

"""

493

825

494

826

runtime_expansions = ("approval_delay", "approval_duration",

495

827

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

496

828

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

507

839

"approved_by_default": "True",

508

840

"enabled": "True",

509

841

}

510

842

511

843

@staticmethod

512

844

def config_parser(config):

513

845

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

520

852

for client_name in config.sections():

521

853

section = dict(config.items(client_name))

522

854

client = settings[client_name] = {}

523

855

524

856

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

525

857

# Reformat values from string types to Python types

526

858

client["approved_by_default"] = config.getboolean(

527

859

client_name, "approved_by_default")

528

860

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

529

861

"enabled")

530

862

531

863

# Uppercase and remove spaces from fingerprint for later

532

864

# comparison purposes with return value from the

533

865

# fingerprint() function

534

866

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

535

867

.replace(" ", ""))

536

868

if "secret" in section:

537

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

869

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

870

.encode("utf-8"),

871

"base64")

538

872

elif "secfile" in section:

539

873

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

540

874

(section["secfile"])),

555

889

client["last_approval_request"] = None

556

890

client["last_checked_ok"] = None

557

891

client["last_checker_status"] = -2

558

892

559

893

return settings

560

561

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

894

895

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

562

896

self.name = name

563

897

if server_settings is None:

564

898

server_settings = {}

566

900

# adding all client settings

567

901

for setting, value in settings.items():

568

902

setattr(self, setting, value)

569

903

570

904

if self.enabled:

571

905

if not hasattr(self, "last_enabled"):

572

906

self.last_enabled = datetime.datetime.utcnow()

576

910

else:

577

911

self.last_enabled = None

578

912

self.expires = None

579

913

580

914

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

581

915

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

582

916

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

583

917

datetime.datetime.utcnow())

584

918

585

919

# attributes specific for this server instance

586

920

self.checker = None

587

921

self.checker_initiator_tag = None

593

927

self.changedstate = multiprocessing_manager.Condition(

594

928

multiprocessing_manager.Lock())

595

929

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

930

for attr in self.__dict__.keys()

597

931

if not attr.startswith("_")]

598

932

self.client_structure.append("client_structure")

599

933

600

934

for name, t in inspect.getmembers(

601

935

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

602

936

if not name.startswith("_"):

603

937

self.client_structure.append(name)

604

938

605

939

# Send notice to process children that client state has changed

606

940

def send_changedstate(self):

607

941

with self.changedstate:

608

942

self.changedstate.notify_all()

609

943

610

944

def enable(self):

611

945

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

612

946

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

617

951

self.last_enabled = datetime.datetime.utcnow()

618

952

self.init_checker()

619

953

self.send_changedstate()

620

954

621

955

def disable(self, quiet=True):

622

956

"""Disable this client."""

623

957

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

625

959

if not quiet:

626

960

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

627

961

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

628

gobject.source_remove(self.disable_initiator_tag)

962

GLib.source_remove(self.disable_initiator_tag)

629

963

self.disable_initiator_tag = None

630

964

self.expires = None

631

965

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

632

gobject.source_remove(self.checker_initiator_tag)

966

GLib.source_remove(self.checker_initiator_tag)

633

967

self.checker_initiator_tag = None

634

968

self.stop_checker()

635

969

self.enabled = False

636

970

if not quiet:

637

971

self.send_changedstate()

638

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

972

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

639

973

return False

640

974

641

975

def __del__(self):

642

976

self.disable()

643

977

644

978

def init_checker(self):

645

979

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

646

980

# and every interval from then on.

647

981

if self.checker_initiator_tag is not None:

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

982

GLib.source_remove(self.checker_initiator_tag)

983

self.checker_initiator_tag = GLib.timeout_add(

650

984

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

651

985

self.start_checker)

652

986

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

653

987

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

988

GLib.source_remove(self.disable_initiator_tag)

989

self.disable_initiator_tag = GLib.timeout_add(

656

990

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

657

991

# Also start a new checker *right now*.

658

992

self.start_checker()

659

993

660

994

def checker_callback(self, source, condition, connection,

661

995

command):

662

996

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

665

999

# Read return code from connection (see call_pipe)

666

1000

returncode = connection.recv()

667

1001

connection.close()

668

1002

669

1003

if returncode >= 0:

670

1004

self.last_checker_status = returncode

671

1005

self.last_checker_signal = None

681

1015

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

682

1016

vars(self))

683

1017

return False

684

1018

685

1019

def checked_ok(self):

686

1020

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

687

1021

self.last_checked_ok = datetime.datetime.utcnow()

688

1022

self.last_checker_status = 0

689

1023

self.last_checker_signal = None

690

1024

self.bump_timeout()

691

1025

692

1026

def bump_timeout(self, timeout=None):

693

1027

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

694

1028

if timeout is None:

695

1029

timeout = self.timeout

696

1030

if self.disable_initiator_tag is not None:

697

gobject.source_remove(self.disable_initiator_tag)

1031

GLib.source_remove(self.disable_initiator_tag)

698

1032

self.disable_initiator_tag = None

699

1033

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

700

self.disable_initiator_tag = gobject.timeout_add(

1034

self.disable_initiator_tag = GLib.timeout_add(

701

1035

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

702

1036

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

703

1037

704

1038

def need_approval(self):

705

1039

self.last_approval_request = datetime.datetime.utcnow()

706

1040

707

1041

def start_checker(self):

708

1042

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

709

1043

710

1044

If a checker already exists, leave it running and do

711

1045

nothing."""

712

1046

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

717

1051

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

718

1052

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

719

1053

# should be.

720

1054

721

1055

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

722

1056

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

723

1057

self.checker.join()

727

1061

# Escape attributes for the shell

728

1062

escaped_attrs = {

729

1063

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

730

for attr in self.runtime_expansions }

1064

for attr in self.runtime_expansions}

731

1065

try:

732

1066

command = self.checker_command % escaped_attrs

733

1067

except TypeError as error:

745

1079

# The exception is when not debugging but nevertheless

746

1080

# running in the foreground; use the previously

747

1081

# created wnull.

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

1082

popen_args = {"close_fds": True,

1083

"shell": True,

1084

"cwd": "/"}

751

1085

if (not self.server_settings["debug"]

752

1086

and self.server_settings["foreground"]):

753

1087

popen_args.update({"stdout": wnull,

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

1088

"stderr": wnull})

1089

pipe = multiprocessing.Pipe(duplex=False)

756

1090

self.checker = multiprocessing.Process(

757

target = call_pipe,

758

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

759

kwargs = popen_args)

1091

target=call_pipe,

1092

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

1093

kwargs=popen_args)

760

1094

self.checker.start()

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

1095

self.checker_callback_tag = GLib.io_add_watch(

1096

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

763

1097

self.checker_callback, pipe[0], command)

764

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

1098

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

765

1099

return True

766

1100

767

1101

def stop_checker(self):

768

1102

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

769

1103

if self.checker_callback_tag:

770

gobject.source_remove(self.checker_callback_tag)

1104

GLib.source_remove(self.checker_callback_tag)

771

1105

self.checker_callback_tag = None

772

1106

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

773

1107

return

782

1116

byte_arrays=False):

783

1117

"""Decorators for marking methods of a DBusObjectWithProperties to

784

1118

become properties on the D-Bus.

785

1119

786

1120

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

787

1121

and with one argument by "Set".

788

1122

789

1123

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

790

1124

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

791

1125

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

795

1129

if byte_arrays and signature != "ay":

796

1130

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

797

1131

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

798

1132

799

1133

def decorator(func):

800

1134

func._dbus_is_property = True

801

1135

func._dbus_interface = dbus_interface

804

1138

func._dbus_name = func.__name__

805

1139

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

806

1140

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

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1141

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

808

1142

return func

809

1143

810

1144

return decorator

811

1145

812

1146

813

1147

def dbus_interface_annotations(dbus_interface):

814

1148

"""Decorator for marking functions returning interface annotations

815

1149

816

1150

Usage:

817

1151

818

1152

@dbus_interface_annotations("org.example.Interface")

819

1153

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

820

1154

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

821

1155

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

822

1156

"false"}

823

1157

"""

824

1158

825

1159

def decorator(func):

826

1160

func._dbus_is_interface = True

827

1161

func._dbus_interface = dbus_interface

828

1162

func._dbus_name = dbus_interface

829

1163

return func

830

1164

831

1165

return decorator

832

1166

833

1167

834

1168

def dbus_annotations(annotations):

835

1169

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

836

1170

Usage:

837

1171

838

1172

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

839

1173

"org.freedesktop.DBus.Property."

840

1174

"EmitsChangedSignal": "false"})

842

1176

access="r")

843

1177

def Property_dbus_property(self):

844

1178

return dbus.Boolean(False)

845

1179

846

1180

See also the DBusObjectWithAnnotations class.

847

1181

"""

848

1182

849

1183

def decorator(func):

850

1184

func._dbus_annotations = annotations

851

1185

return func

852

1186

853

1187

return decorator

854

1188

855

1189

873

1207

874

1208

class DBusObjectWithAnnotations(dbus.service.Object):

875

1209

"""A D-Bus object with annotations.

876

1210

877

1211

Classes inheriting from this can use the dbus_annotations

878

1212

decorator to add annotations to methods or signals.

879

1213

"""

880

1214

881

1215

@staticmethod

882

1216

def _is_dbus_thing(thing):

883

1217

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

884

1218

885

1219

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

886

1220

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

887

1221

"""

888

1222

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

889

1223

False)

890

1224

891

1225

def _get_all_dbus_things(self, thing):

892

1226

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

893

1227

"""

896

1230

for cls in self.__class__.__mro__

897

1231

for name, athing in

898

1232

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

899

1233

900

1234

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

901

out_signature = "s",

902

path_keyword = 'object_path',

903

connection_keyword = 'connection')

1235

out_signature="s",

1236

path_keyword='object_path',

1237

connection_keyword='connection')

904

1238

def Introspect(self, object_path, connection):

905

1239

"""Overloading of standard D-Bus method.

906

1240

907

1241

Inserts annotation tags on methods and signals.

908

1242

"""

909

1243

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

910

1244

connection)

911

1245

try:

912

1246

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

913

1247

914

1248

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

915

1249

# Add annotation tags

916

1250

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

943

1277

if_tag.appendChild(ann_tag)

944

1278

# Fix argument name for the Introspect method itself

945

1279

if (if_tag.getAttribute("name")

946

== dbus.INTROSPECTABLE_IFACE):

1280

== dbus.INTROSPECTABLE_IFACE):

947

1281

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

948

1282

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

949

1283

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

962

1296

963

1297

class DBusObjectWithProperties(DBusObjectWithAnnotations):

964

1298

"""A D-Bus object with properties.

965

1299

966

1300

Classes inheriting from this can use the dbus_service_property

967

1301

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

968

1302

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

969

1303

"""

970

1304

971

1305

def _get_dbus_property(self, interface_name, property_name):

972

1306

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

973

1307

property with the specified name and interface.

978

1312

if (value._dbus_name == property_name

979

1313

and value._dbus_interface == interface_name):

980

1314

return value.__get__(self)

981

1315

982

1316

# No such property

983

1317

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

984

1318

self.dbus_object_path, interface_name, property_name))

985

1319

986

1320

@classmethod

987

1321

def _get_all_interface_names(cls):

988

1322

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

991

1325

for x in (inspect.getmro(cls))

992

1326

for attr in dir(x))

993

1327

if name is not None)

994

1328

995

1329

@dbus.service.method(dbus.PROPERTIES_IFACE,

996

1330

in_signature="ss",

997

1331

out_signature="v")

1005

1339

if not hasattr(value, "variant_level"):

1006

1340

return value

1007

1341

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

1008

1342

1009

1343

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

1010

1344

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

1011

1345

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

1023

1357

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

1024

1358

for byte in value))

1025

1359

prop(value)

1026

1360

1027

1361

@dbus.service.method(dbus.PROPERTIES_IFACE,

1028

1362

in_signature="s",

1029

1363

out_signature="a{sv}")

1030

1364

def GetAll(self, interface_name):

1031

1365

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

1032

1366

standard.

1033

1367

1034

1368

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

1035

1369

"""

1036

1370

properties = {}

1047

1381

properties[name] = value

1048

1382

continue

1049

1383

properties[name] = type(value)(

1050

value, variant_level = value.variant_level + 1)

1384

value, variant_level=value.variant_level + 1)

1051

1385

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

1052

1386

1053

1387

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

1054

1388

def PropertiesChanged(self, interface_name, changed_properties,

1055

1389

invalidated_properties):

1057

1391

standard.

1058

1392

"""

1059

1393

pass

1060

1394

1061

1395

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1062

1396

out_signature="s",

1063

1397

path_keyword='object_path',

1064

1398

connection_keyword='connection')

1065

1399

def Introspect(self, object_path, connection):

1066

1400

"""Overloading of standard D-Bus method.

1067

1401

1068

1402

Inserts property tags and interface annotation tags.

1069

1403

"""

1070

1404

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1072

1406

connection)

1073

1407

try:

1074

1408

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

1075

1409

1076

1410

def make_tag(document, name, prop):

1077

1411

e = document.createElement("property")

1078

1412

e.setAttribute("name", name)

1079

1413

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

1080

1414

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

1081

1415

return e

1082

1416

1083

1417

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

1084

1418

# Add property tags

1085

1419

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

1127

1461

exc_info=error)

1128

1462

return xmlstring

1129

1463

1464

1130

1465

try:

1131

1466

dbus.OBJECT_MANAGER_IFACE

1132

1467

except AttributeError:

1133

1468

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

1134

1469

1470

1135

1471

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1136

1472

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

1137

1473

1138

1474

Classes inheriting from this exposes the standard

1139

1475

GetManagedObjects call and the InterfacesAdded and

1140

1476

InterfacesRemoved signals on the standard

1141

1477

"org.freedesktop.DBus.ObjectManager" interface.

1142

1478

1143

1479

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

1144

1480

manually.

1145

1481

"""

1146

1482

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1147

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

1483

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

1148

1484

def GetManagedObjects(self):

1149

1485

"""This function must be overridden"""

1150

1486

raise NotImplementedError()

1151

1487

1152

1488

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1153

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

1489

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

1154

1490

def InterfacesAdded(self, object_path, interfaces_and_properties):

1155

1491

pass

1156

1157

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1158

signature = "oas")

1492

1493

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

1159

1494

def InterfacesRemoved(self, object_path, interfaces):

1160

1495

pass

1161

1496

1162

1497

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1163

out_signature = "s",

1164

path_keyword = 'object_path',

1165

connection_keyword = 'connection')

1498

out_signature="s",

1499

path_keyword='object_path',

1500

connection_keyword='connection')

1166

1501

def Introspect(self, object_path, connection):

1167

1502

"""Overloading of standard D-Bus method.

1168

1503

1169

1504

Override return argument name of GetManagedObjects to be

1170

1505

"objpath_interfaces_and_properties"

1171

1506

"""

1172

xmlstring = DBusObjectWithAnnotations(self, object_path,

1173

connection)

1507

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1508

object_path,

1509

connection)

1174

1510

try:

1175

1511

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

1176

1512

1177

1513

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

1178

1514

# Fix argument name for the GetManagedObjects method

1179

1515

if (if_tag.getAttribute("name")

1180

== dbus.OBJECT_MANAGER_IFACE):

1516

== dbus.OBJECT_MANAGER_IFACE):

1181

1517

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

1182

1518

if (cn.getAttribute("name")

1183

1519

== "GetManagedObjects"):

1193

1529

except (AttributeError, xml.dom.DOMException,

1194

1530

xml.parsers.expat.ExpatError) as error:

1195

1531

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

1196

exc_info = error)

1532

exc_info=error)

1197

1533

return xmlstring

1198

1534

1535

1199

1536

def datetime_to_dbus(dt, variant_level=0):

1200

1537

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

1201

1538

if dt is None:

1202

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

1539

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

1203

1540

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

1204

1541

1205

1542

1208

1545

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

1209

1546

interface names according to the "alt_interface_names" mapping.

1210

1547

Usage:

1211

1548

1212

1549

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

1213

1550

"net.example.AlternateInterface"})

1214

1551

class SampleDBusObject(dbus.service.Object):

1215

1552

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

1216

1553

def SampleDBusMethod():

1217

1554

pass

1218

1555

1219

1556

The above "SampleDBusMethod" on "SampleDBusObject" will be

1220

1557

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

1221

1558

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

1222

1559

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

1223

1560

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

1224

1561

1225

1562

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

1226

1563

(from DBusObjectWithProperties) and interfaces (from the

1227

1564

dbus_interface_annotations decorator).

1228

1565

"""

1229

1566

1230

1567

def wrapper(cls):

1231

1568

for orig_interface_name, alt_interface_name in (

1232

1569

alt_interface_names.items()):

1247

1584

interface_names.add(alt_interface)

1248

1585

# Is this a D-Bus signal?

1249

1586

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

1587

# Extract the original non-method undecorated

1588

# function by black magic

1250

1589

if sys.version_info.major == 2:

1251

# Extract the original non-method undecorated

1252

# function by black magic

1253

1590

nonmethod_func = (dict(

1254

1591

zip(attribute.func_code.co_freevars,

1255

1592

attribute.__closure__))

1256

1593

["func"].cell_contents)

1257

1594

else:

1258

nonmethod_func = attribute

1595

nonmethod_func = (dict(

1596

zip(attribute.__code__.co_freevars,

1597

attribute.__closure__))

1598

["func"].cell_contents)

1259

1599

# Create a new, but exactly alike, function

1260

1600

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

1261

1601

# with the alternate D-Bus interface name

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__)

1602

new_function = copy_function(nonmethod_func)

1276

1603

new_function = (dbus.service.signal(

1277

1604

alt_interface,

1278

1605

attribute._dbus_signature)(new_function))

1282

1609

attribute._dbus_annotations)

1283

1610

except AttributeError:

1284

1611

pass

1612

1285

1613

# Define a creator of a function to call both the

1286

1614

# original and alternate functions, so both the

1287

1615

# original and alternate signals gets sent when

1290

1618

"""This function is a scope container to pass

1291

1619

func1 and func2 to the "call_both" function

1292

1620

outside of its arguments"""

1293

1621

1622

@functools.wraps(func2)

1294

1623

def call_both(*args, **kwargs):

1295

1624

"""This function will emit two D-Bus

1296

1625

signals by calling func1 and func2"""

1297

1626

func1(*args, **kwargs)

1298

1627

func2(*args, **kwargs)

1299

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

1300

1634

return call_both

1301

1635

# Create the "call_both" function and add it to

1302

1636

# the class

1312

1646

alt_interface,

1313

1647

attribute._dbus_in_signature,

1314

1648

attribute._dbus_out_signature)

1315

(types.FunctionType(attribute.func_code,

1316

attribute.func_globals,

1317

attribute.func_name,

1318

attribute.func_defaults,

1319

attribute.func_closure)))

1649

(copy_function(attribute)))

1320

1650

# Copy annotations, if any

1321

1651

try:

1322

1652

attr[attrname]._dbus_annotations = dict(

1334

1664

attribute._dbus_access,

1335

1665

attribute._dbus_get_args_options

1336

1666

["byte_arrays"])

1337

(types.FunctionType(

1338

attribute.func_code,

1339

attribute.func_globals,

1340

attribute.func_name,

1341

attribute.func_defaults,

1342

attribute.func_closure)))

1667

(copy_function(attribute)))

1343

1668

# Copy annotations, if any

1344

1669

try:

1345

1670

attr[attrname]._dbus_annotations = dict(

1354

1679

# to the class.

1355

1680

attr[attrname] = (

1356

1681

dbus_interface_annotations(alt_interface)

1357

(types.FunctionType(attribute.func_code,

1358

attribute.func_globals,

1359

attribute.func_name,

1360

attribute.func_defaults,

1361

attribute.func_closure)))

1682

(copy_function(attribute)))

1362

1683

if deprecate:

1363

1684

# Deprecate all alternate interfaces

1364

iname="_AlternateDBusNames_interface_annotation{}"

1685

iname = "_AlternateDBusNames_interface_annotation{}"

1365

1686

for interface_name in interface_names:

1366

1687

1367

1688

@dbus_interface_annotations(interface_name)

1368

1689

def func(self):

1369

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

1370

"true" }

1690

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

1691

"true"}

1371

1692

# Find an unused name

1372

1693

for aname in (iname.format(i)

1373

1694

for i in itertools.count()):

1377

1698

if interface_names:

1378

1699

# Replace the class with a new subclass of it with

1379

1700

# methods, signals, etc. as created above.

1380

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

1381

(cls, ), attr)

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)

1382

1707

return cls

1383

1708

1384

1709

return wrapper

1385

1710

1386

1711

1388

1713

"se.bsnet.fukt.Mandos"})

1389

1714

class ClientDBus(Client, DBusObjectWithProperties):

1390

1715

"""A Client class using D-Bus

1391

1716

1392

1717

Attributes:

1393

1718

dbus_object_path: dbus.ObjectPath

1394

1719

bus: dbus.SystemBus()

1395

1720

"""

1396

1721

1397

1722

runtime_expansions = (Client.runtime_expansions

1398

1723

+ ("dbus_object_path", ))

1399

1724

1400

1725

_interface = "se.recompile.Mandos.Client"

1401

1726

1402

1727

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

1403

1404

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

1728

1729

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

1405

1730

self.bus = bus

1406

1731

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

1407

1732

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

1413

1738

"/clients/" + client_object_name)

1414

1739

DBusObjectWithProperties.__init__(self, self.bus,

1415

1740

self.dbus_object_path)

1416

1741

1417

1742

def notifychangeproperty(transform_func, dbus_name,

1418

1743

type_func=lambda x: x,

1419

1744

variant_level=1,

1421

1746

_interface=_interface):

1422

1747

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

1423

1748

its changes to DBus.

1424

1749

1425

1750

transform_fun: Function that takes a value and a variant_level

1426

1751

and transforms it to a D-Bus type.

1427

1752

dbus_name: D-Bus name of the variable

1430

1755

variant_level: D-Bus variant level. Default: 1

1431

1756

"""

1432

1757

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

1433

1758

1434

1759

def setter(self, value):

1435

1760

if hasattr(self, "dbus_object_path"):

1436

1761

if (not hasattr(self, attrname) or

1443

1768

else:

1444

1769

dbus_value = transform_func(

1445

1770

type_func(value),

1446

variant_level = variant_level)

1771

variant_level=variant_level)

1447

1772

self.PropertyChanged(dbus.String(dbus_name),

1448

1773

dbus_value)

1449

1774

self.PropertiesChanged(

1450

1775

_interface,

1451

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

1452

dbus_value }),

1776

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

1777

dbus_value}),

1453

1778

dbus.Array())

1454

1779

setattr(self, attrname, value)

1455

1780

1456

1781

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

1457

1782

1458

1783

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1459

1784

approvals_pending = notifychangeproperty(dbus.Boolean,

1460

1785

"ApprovalPending",

1461

type_func = bool)

1786

type_func=bool)

1462

1787

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

1463

1788

last_enabled = notifychangeproperty(datetime_to_dbus,

1464

1789

"LastEnabled")

1465

1790

checker = notifychangeproperty(

1466

1791

dbus.Boolean, "CheckerRunning",

1467

type_func = lambda checker: checker is not None)

1792

type_func=lambda checker: checker is not None)

1468

1793

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1469

1794

"LastCheckedOK")

1470

1795

last_checker_status = notifychangeproperty(dbus.Int16,

1475

1800

"ApprovedByDefault")

1476

1801

approval_delay = notifychangeproperty(

1477

1802

dbus.UInt64, "ApprovalDelay",

1478

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

1803

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

1479

1804

approval_duration = notifychangeproperty(

1480

1805

dbus.UInt64, "ApprovalDuration",

1481

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

1806

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

1482

1807

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

1483

1808

timeout = notifychangeproperty(

1484

1809

dbus.UInt64, "Timeout",

1485

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

1810

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

1486

1811

extended_timeout = notifychangeproperty(

1487

1812

dbus.UInt64, "ExtendedTimeout",

1488

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

1813

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

1489

1814

interval = notifychangeproperty(

1490

1815

dbus.UInt64, "Interval",

1491

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

1816

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

1492

1817

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

1493

1818

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

1494

1819

invalidate_only=True)

1495

1820

1496

1821

del notifychangeproperty

1497

1822

1498

1823

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

1499

1824

try:

1500

1825

self.remove_from_connection()

1503

1828

if hasattr(DBusObjectWithProperties, "__del__"):

1504

1829

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

1505

1830

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

1506

1831

1507

1832

def checker_callback(self, source, condition,

1508

1833

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

1509

1834

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

1525

1850

| self.last_checker_signal),

1526

1851

dbus.String(command))

1527

1852

return ret

1528

1853

1529

1854

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

1530

1855

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

1531

1856

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

1535

1860

# Emit D-Bus signal

1536

1861

self.CheckerStarted(self.current_checker_command)

1537

1862

return r

1538

1863

1539

1864

def _reset_approved(self):

1540

1865

self.approved = None

1541

1866

return False

1542

1867

1543

1868

def approve(self, value=True):

1544

1869

self.approved = value

1545

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

1546

* 1000), self._reset_approved)

1870

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

1871

* 1000), self._reset_approved)

1547

1872

self.send_changedstate()

1548

1549

## D-Bus methods, signals & properties

1550

1551

## Interfaces

1552

1553

## Signals

1554

1873

1874

# D-Bus methods, signals & properties

1875

1876

# Interfaces

1877

1878

# Signals

1879

1555

1880

# CheckerCompleted - signal

1556

1881

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

1557

1882

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

1558

1883

"D-Bus signal"

1559

1884

pass

1560

1885

1561

1886

# CheckerStarted - signal

1562

1887

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

1563

1888

def CheckerStarted(self, command):

1564

1889

"D-Bus signal"

1565

1890

pass

1566

1891

1567

1892

# PropertyChanged - signal

1568

1893

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

1569

1894

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

1570

1895

def PropertyChanged(self, property, value):

1571

1896

"D-Bus signal"

1572

1897

pass

1573

1898

1574

1899

# GotSecret - signal

1575

1900

@dbus.service.signal(_interface)

1576

1901

def GotSecret(self):

1579

1904

server to mandos-client

1580

1905

"""

1581

1906

pass

1582

1907

1583

1908

# Rejected - signal

1584

1909

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

1585

1910

def Rejected(self, reason):

1586

1911

"D-Bus signal"

1587

1912

pass

1588

1913

1589

1914

# NeedApproval - signal

1590

1915

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

1591

1916

def NeedApproval(self, timeout, default):

1592

1917

"D-Bus signal"

1593

1918

return self.need_approval()

1594

1595

## Methods

1596

1919

1920

# Methods

1921

1597

1922

# Approve - method

1598

1923

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

1599

1924

def Approve(self, value):

1600

1925

self.approve(value)

1601

1926

1602

1927

# CheckedOK - method

1603

1928

@dbus.service.method(_interface)

1604

1929

def CheckedOK(self):

1605

1930

self.checked_ok()

1606

1931

1607

1932

# Enable - method

1608

1933

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

1609

1934

@dbus.service.method(_interface)

1610

1935

def Enable(self):

1611

1936

"D-Bus method"

1612

1937

self.enable()

1613

1938

1614

1939

# StartChecker - method

1615

1940

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

1616

1941

@dbus.service.method(_interface)

1617

1942

def StartChecker(self):

1618

1943

"D-Bus method"

1619

1944

self.start_checker()

1620

1945

1621

1946

# Disable - method

1622

1947

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

1623

1948

@dbus.service.method(_interface)

1624

1949

def Disable(self):

1625

1950

"D-Bus method"

1626

1951

self.disable()

1627

1952

1628

1953

# StopChecker - method

1629

1954

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

1630

1955

@dbus.service.method(_interface)

1631

1956

def StopChecker(self):

1632

1957

self.stop_checker()

1633

1634

## Properties

1635

1958

1959

# Properties

1960

1636

1961

# ApprovalPending - property

1637

1962

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

1638

1963

def ApprovalPending_dbus_property(self):

1639

1964

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

1640

1965

1641

1966

# ApprovedByDefault - property

1642

1967

@dbus_service_property(_interface,

1643

1968

signature="b",

1646

1971

if value is None: # get

1647

1972

return dbus.Boolean(self.approved_by_default)

1648

1973

self.approved_by_default = bool(value)

1649

1974

1650

1975

# ApprovalDelay - property

1651

1976

@dbus_service_property(_interface,

1652

1977

signature="t",

1656

1981

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

1657

1982

* 1000)

1658

1983

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

1659

1984

1660

1985

# ApprovalDuration - property

1661

1986

@dbus_service_property(_interface,

1662

1987

signature="t",

1666

1991

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

1667

1992

* 1000)

1668

1993

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

1669

1994

1670

1995

# Name - property

1671

1996

@dbus_annotations(

1672

1997

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

1673

1998

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

1674

1999

def Name_dbus_property(self):

1675

2000

return dbus.String(self.name)

1676

2001

1677

2002

# Fingerprint - property

1678

2003

@dbus_annotations(

1679

2004

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

1680

2005

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

1681

2006

def Fingerprint_dbus_property(self):

1682

2007

return dbus.String(self.fingerprint)

1683

2008

1684

2009

# Host - property

1685

2010

@dbus_service_property(_interface,

1686

2011

signature="s",

1689

2014

if value is None: # get

1690

2015

return dbus.String(self.host)

1691

2016

self.host = str(value)

1692

2017

1693

2018

# Created - property

1694

2019

@dbus_annotations(

1695

2020

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

1696

2021

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

1697

2022

def Created_dbus_property(self):

1698

2023

return datetime_to_dbus(self.created)

1699

2024

1700

2025

# LastEnabled - property

1701

2026

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

1702

2027

def LastEnabled_dbus_property(self):

1703

2028

return datetime_to_dbus(self.last_enabled)

1704

2029

1705

2030

# Enabled - property

1706

2031

@dbus_service_property(_interface,

1707

2032

signature="b",

1713

2038

self.enable()

1714

2039

else:

1715

2040

self.disable()

1716

2041

1717

2042

# LastCheckedOK - property

1718

2043

@dbus_service_property(_interface,

1719

2044

signature="s",

1723

2048

self.checked_ok()

1724

2049

return

1725

2050

return datetime_to_dbus(self.last_checked_ok)

1726

2051

1727

2052

# LastCheckerStatus - property

1728

2053

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

1729

2054

def LastCheckerStatus_dbus_property(self):

1730

2055

return dbus.Int16(self.last_checker_status)

1731

2056

1732

2057

# Expires - property

1733

2058

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

1734

2059

def Expires_dbus_property(self):

1735

2060

return datetime_to_dbus(self.expires)

1736

2061

1737

2062

# LastApprovalRequest - property

1738

2063

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

1739

2064

def LastApprovalRequest_dbus_property(self):

1740

2065

return datetime_to_dbus(self.last_approval_request)

1741

2066

1742

2067

# Timeout - property

1743

2068

@dbus_service_property(_interface,

1744

2069

signature="t",

1759

2084

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

1760

2085

is None):

1761

2086

return

1762

gobject.source_remove(self.disable_initiator_tag)

1763

self.disable_initiator_tag = gobject.timeout_add(

2087

GLib.source_remove(self.disable_initiator_tag)

2088

self.disable_initiator_tag = GLib.timeout_add(

1764

2089

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

1765

2090

self.disable)

1766

2091

1767

2092

# ExtendedTimeout - property

1768

2093

@dbus_service_property(_interface,

1769

2094

signature="t",

1773

2098

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

1774

2099

* 1000)

1775

2100

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

1776

2101

1777

2102

# Interval - property

1778

2103

@dbus_service_property(_interface,

1779

2104

signature="t",

1786

2111

return

1787

2112

if self.enabled:

1788

2113

# Reschedule checker run

1789

gobject.source_remove(self.checker_initiator_tag)

1790

self.checker_initiator_tag = gobject.timeout_add(

2114

GLib.source_remove(self.checker_initiator_tag)

2115

self.checker_initiator_tag = GLib.timeout_add(

1791

2116

value, self.start_checker)

1792

self.start_checker() # Start one now, too

1793

2117

self.start_checker() # Start one now, too

2118

1794

2119

# Checker - property

1795

2120

@dbus_service_property(_interface,

1796

2121

signature="s",

1799

2124

if value is None: # get

1800

2125

return dbus.String(self.checker_command)

1801

2126

self.checker_command = str(value)

1802

2127

1803

2128

# CheckerRunning - property

1804

2129

@dbus_service_property(_interface,

1805

2130

signature="b",

1811

2136

self.start_checker()

1812

2137

else:

1813

2138

self.stop_checker()

1814

2139

1815

2140

# ObjectPath - property

1816

2141

@dbus_annotations(

1817

2142

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

1818

2143

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

1819

2144

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

1820

2145

def ObjectPath_dbus_property(self):

1821

return self.dbus_object_path # is already a dbus.ObjectPath

1822

2146

return self.dbus_object_path # is already a dbus.ObjectPath

2147

1823

2148

# Secret = property

1824

2149

@dbus_annotations(

1825

2150

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

1830

2155

byte_arrays=True)

1831

2156

def Secret_dbus_property(self, value):

1832

2157

self.secret = bytes(value)

1833

2158

1834

2159

del _interface

1835

2160

1836

2161

1840

2165

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

1841

2166

if not self._pipe.recv():

1842

2167

raise KeyError(fpr)

1843

2168

1844

2169

def __getattribute__(self, name):

1845

2170

if name == '_pipe':

1846

2171

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

1849

2174

if data[0] == 'data':

1850

2175

return data[1]

1851

2176

if data[0] == 'function':

1852

2177

1853

2178

def func(*args, **kwargs):

1854

2179

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

1855

2180

return self._pipe.recv()[1]

1856

2181

1857

2182

return func

1858

2183

1859

2184

def __setattr__(self, name, value):

1860

2185

if name == '_pipe':

1861

2186

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

1864

2189

1865

2190

class ClientHandler(socketserver.BaseRequestHandler, object):

1866

2191

"""A class to handle client connections.

1867

2192

1868

2193

Instantiated once for each connection to handle it.

1869

2194

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

1870

2195

1871

2196

def handle(self):

1872

2197

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

1873

2198

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

1874

2199

str(self.client_address))

1875

2200

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

1876

2201

self.server.child_pipe.fileno())

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"))

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"))

1890

2209

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

1891

2210

priority = self.server.gnutls_priority

1892

2211

if priority is None:

1893

2212

priority = "NORMAL"

1894

gnutls.library.functions.gnutls_priority_set_direct(

1895

session._c_object, priority, None)

1896

2213

gnutls.priority_set_direct(session._c_object,

2214

priority.encode("utf-8"),

2215

None)

2216

1897

2217

# Start communication using the Mandos protocol

1898

2218

# Get protocol number

1899

2219

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

1904

2224

except (ValueError, IndexError, RuntimeError) as error:

1905

2225

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

1906

2226

return

1907

2227

1908

2228

# Start GnuTLS connection

1909

2229

try:

1910

2230

session.handshake()

1911

except gnutls.errors.GNUTLSError as error:

2231

except gnutls.Error as error:

1912

2232

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

1913

2233

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

1914

2234

# established. Just abandon the request.

1915

2235

return

1916

2236

logger.debug("Handshake succeeded")

1917

2237

1918

2238

approval_required = False

1919

2239

try:

1920

2240

try:

1921

2241

fpr = self.fingerprint(

1922

2242

self.peer_certificate(session))

1923

except (TypeError,

1924

gnutls.errors.GNUTLSError) as error:

2243

except (TypeError, gnutls.Error) as error:

1925

2244

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

1926

2245

return

1927

2246

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

1928

2247

1929

2248

try:

1930

2249

client = ProxyClient(child_pipe, fpr,

1931

2250

self.client_address)

1932

2251

except KeyError:

1933

2252

return

1934

2253

1935

2254

if client.approval_delay:

1936

2255

delay = client.approval_delay

1937

2256

client.approvals_pending += 1

1938

2257

approval_required = True

1939

2258

1940

2259

while True:

1941

2260

if not client.enabled:

1942

2261

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

1945

2264

# Emit D-Bus signal

1946

2265

client.Rejected("Disabled")

1947

2266

return

1948

2267

1949

2268

if client.approved or not client.approval_delay:

1950

#We are approved or approval is disabled

2269

# We are approved or approval is disabled

1951

2270

break

1952

2271

elif client.approved is None:

1953

2272

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

1964

2283

# Emit D-Bus signal

1965

2284

client.Rejected("Denied")

1966

2285

return

1967

1968

#wait until timeout or approved

2286

2287

# wait until timeout or approved

1969

2288

time = datetime.datetime.now()

1970

2289

client.changedstate.acquire()

1971

2290

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

1984

2303

break

1985

2304

else:

1986

2305

delay -= time2 - time

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

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

2001

2314

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

2002

2315

# bump the timeout using extended_timeout

2003

2316

client.bump_timeout(client.extended_timeout)

2004

2317

if self.server.use_dbus:

2005

2318

# Emit D-Bus signal

2006

2319

client.GotSecret()

2007

2320

2008

2321

finally:

2009

2322

if approval_required:

2010

2323

client.approvals_pending -= 1

2011

2324

try:

2012

2325

session.bye()

2013

except gnutls.errors.GNUTLSError as error:

2326

except gnutls.Error as error:

2014

2327

logger.warning("GnuTLS bye failed",

2015

2328

exc_info=error)

2016

2329

2017

2330

@staticmethod

2018

2331

def peer_certificate(session):

2019

2332

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

2020

2333

# If not an OpenPGP certificate...

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

2334

if (gnutls.certificate_type_get(session._c_object)

2335

!= gnutls.CRT_OPENPGP):

2336

# ...return invalid data

2337

return b""

2026

2338

list_size = ctypes.c_uint(1)

2027

cert_list = (gnutls.library.functions

2028

.gnutls_certificate_get_peers

2339

cert_list = (gnutls.certificate_get_peers

2029

2340

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

2030

2341

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

2031

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

2032

" certificate")

2342

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

2033

2343

if list_size.value == 0:

2034

2344

return None

2035

2345

cert = cert_list[0]

2036

2346

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

2037

2347

2038

2348

@staticmethod

2039

2349

def fingerprint(openpgp):

2040

2350

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2041

2351

# New GnuTLS "datum" with the OpenPGP public key

2042

datum = gnutls.library.types.gnutls_datum_t(

2352

datum = gnutls.datum_t(

2043

2353

ctypes.cast(ctypes.c_char_p(openpgp),

2044

2354

ctypes.POINTER(ctypes.c_ubyte)),

2045

2355

ctypes.c_uint(len(openpgp)))

2046

2356

# New empty GnuTLS certificate

2047

crt = gnutls.library.types.gnutls_openpgp_crt_t()

2048

gnutls.library.functions.gnutls_openpgp_crt_init(

2049

ctypes.byref(crt))

2357

crt = gnutls.openpgp_crt_t()

2358

gnutls.openpgp_crt_init(ctypes.byref(crt))

2050

2359

# Import the OpenPGP public key into the certificate

2051

gnutls.library.functions.gnutls_openpgp_crt_import(

2052

crt, ctypes.byref(datum),

2053

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2360

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

2361

gnutls.OPENPGP_FMT_RAW)

2054

2362

# Verify the self signature in the key

2055

2363

crtverify = ctypes.c_uint()

2056

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

2057

crt, 0, ctypes.byref(crtverify))

2364

gnutls.openpgp_crt_verify_self(crt, 0,

2365

ctypes.byref(crtverify))

2058

2366

if crtverify.value != 0:

2059

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2060

raise gnutls.errors.CertificateSecurityError(

2061

"Verify failed")

2367

gnutls.openpgp_crt_deinit(crt)

2368

raise gnutls.CertificateSecurityError(code

2369

=crtverify.value)

2062

2370

# New buffer for the fingerprint

2063

2371

buf = ctypes.create_string_buffer(20)

2064

2372

buf_len = ctypes.c_size_t()

2065

2373

# Get the fingerprint from the certificate into the buffer

2066

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

2067

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

2374

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

2375

ctypes.byref(buf_len))

2068

2376

# Deinit the certificate

2069

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2377

gnutls.openpgp_crt_deinit(crt)

2070

2378

# Convert the buffer to a Python bytestring

2071

2379

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

2072

2380

# Convert the bytestring to hexadecimal notation

2076

2384

2077

2385

class MultiprocessingMixIn(object):

2078

2386

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

2079

2387

2080

2388

def sub_process_main(self, request, address):

2081

2389

try:

2082

2390

self.finish_request(request, address)

2083

2391

except Exception:

2084

2392

self.handle_error(request, address)

2085

2393

self.close_request(request)

2086

2394

2087

2395

def process_request(self, request, address):

2088

2396

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

2089

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

2090

args = (request, address))

2397

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

2398

args=(request, address))

2091

2399

proc.start()

2092

2400

return proc

2093

2401

2094

2402

2095

2403

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2096

2404

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

2097

2405

2098

2406

def process_request(self, request, client_address):

2099

2407

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

2100

2408

2101

2409

This function creates a new pipe in self.pipe

2102

2410

"""

2103

2411

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2104

2412

2105

2413

proc = MultiprocessingMixIn.process_request(self, request,

2106

2414

client_address)

2107

2415

self.child_pipe.close()

2108

2416

self.add_pipe(parent_pipe, proc)

2109

2417

2110

2418

def add_pipe(self, parent_pipe, proc):

2111

2419

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

2112

2420

raise NotImplementedError()

2115

2423

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2116

2424

socketserver.TCPServer, object):

2117

2425

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

2118

2426

2119

2427

Attributes:

2120

2428

enabled: Boolean; whether this server is activated yet

2121

2429

interface: None or a network interface name (string)

2122

2430

use_ipv6: Boolean; to use IPv6 or not

2123

2431

"""

2124

2432

2125

2433

def __init__(self, server_address, RequestHandlerClass,

2126

2434

interface=None,

2127

2435

use_ipv6=True,

2137

2445

self.socketfd = socketfd

2138

2446

# Save the original socket.socket() function

2139

2447

self.socket_socket = socket.socket

2448

2140

2449

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

2141

#

2450

#

2142

2451

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

2143

2452

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

2144

2453

# patching socket.socket.)

2145

#

2454

#

2146

2455

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

2147

2456

@functools.wraps(socket.socket)

2148

2457

def socket_wrapper(*args, **kwargs):

2160

2469

# socket_wrapper(), if socketfd was set.

2161

2470

socketserver.TCPServer.__init__(self, server_address,

2162

2471

RequestHandlerClass)

2163

2472

2164

2473

def server_bind(self):

2165

2474

"""This overrides the normal server_bind() function

2166

2475

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

2167

2476

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

2477

global SO_BINDTODEVICE

2168

2478

if self.interface is not None:

2169

2479

if SO_BINDTODEVICE is None:

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

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

2191

2501

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

2192

2502

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

2193

2503

if not self.server_address[0]:

2194

2504

if self.address_family == socket.AF_INET6:

2195

any_address = "::" # in6addr_any

2505

any_address = "::" # in6addr_any

2196

2506

else:

2197

any_address = "0.0.0.0" # INADDR_ANY

2507

any_address = "0.0.0.0" # INADDR_ANY

2198

2508

self.server_address = (any_address,

2199

2509

self.server_address[1])

2200

2510

elif not self.server_address[1]:

2210

2520

2211

2521

class MandosServer(IPv6_TCPServer):

2212

2522

"""Mandos server.

2213

2523

2214

2524

Attributes:

2215

2525

clients: set of Client objects

2216

2526

gnutls_priority GnuTLS priority string

2217

2527

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

2218

2219

Assumes a gobject.MainLoop event loop.

2528

2529

Assumes a GLib.MainLoop event loop.

2220

2530

"""

2221

2531

2222

2532

def __init__(self, server_address, RequestHandlerClass,

2223

2533

interface=None,

2224

2534

use_ipv6=True,

2234

2544

self.gnutls_priority = gnutls_priority

2235

2545

IPv6_TCPServer.__init__(self, server_address,

2236

2546

RequestHandlerClass,

2237

interface = interface,

2238

use_ipv6 = use_ipv6,

2239

socketfd = socketfd)

2240

2547

interface=interface,

2548

use_ipv6=use_ipv6,

2549

socketfd=socketfd)

2550

2241

2551

def server_activate(self):

2242

2552

if self.enabled:

2243

2553

return socketserver.TCPServer.server_activate(self)

2244

2554

2245

2555

def enable(self):

2246

2556

self.enabled = True

2247

2557

2248

2558

def add_pipe(self, parent_pipe, proc):

2249

2559

# Call "handle_ipc" for both data and EOF events

2250

gobject.io_add_watch(

2560

GLib.io_add_watch(

2251

2561

parent_pipe.fileno(),

2252

gobject.IO_IN | gobject.IO_HUP,

2562

GLib.IO_IN | GLib.IO_HUP,

2253

2563

functools.partial(self.handle_ipc,

2254

parent_pipe = parent_pipe,

2255

proc = proc))

2256

2564

parent_pipe=parent_pipe,

2565

proc=proc))

2566

2257

2567

def handle_ipc(self, source, condition,

2258

2568

parent_pipe=None,

2259

proc = None,

2569

proc=None,

2260

2570

client_object=None):

2261

2571

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

2262

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

2572

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

2263

2573

# Wait for other process to exit

2264

2574

proc.join()

2265

2575

return False

2266

2576

2267

2577

# Read a request from the child

2268

2578

request = parent_pipe.recv()

2269

2579

command = request[0]

2270

2580

2271

2581

if command == 'init':

2272

fpr = request[1]

2582

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

2273

2583

address = request[2]

2274

2275

for c in self.clients.itervalues():

2584

2585

for c in self.clients.values():

2276

2586

if c.fingerprint == fpr:

2277

2587

client = c

2278

2588

break

2285

2595

address[0])

2286

2596

parent_pipe.send(False)

2287

2597

return False

2288

2289

gobject.io_add_watch(

2598

2599

GLib.io_add_watch(

2290

2600

parent_pipe.fileno(),

2291

gobject.IO_IN | gobject.IO_HUP,

2601

GLib.IO_IN | GLib.IO_HUP,

2292

2602

functools.partial(self.handle_ipc,

2293

parent_pipe = parent_pipe,

2294

proc = proc,

2295

client_object = client))

2603

parent_pipe=parent_pipe,

2604

proc=proc,

2605

client_object=client))

2296

2606

parent_pipe.send(True)

2297

2607

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

2298

2608

# same fileno

2301

2611

funcname = request[1]

2302

2612

args = request[2]

2303

2613

kwargs = request[3]

2304

2614

2305

2615

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

2306

2616

funcname)(*args,

2307

2617

**kwargs)))

2308

2618

2309

2619

if command == 'getattr':

2310

2620

attrname = request[1]

2311

2621

if isinstance(client_object.__getattribute__(attrname),

2314

2624

else:

2315

2625

parent_pipe.send((

2316

2626

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

2317

2627

2318

2628

if command == 'setattr':

2319

2629

attrname = request[1]

2320

2630

value = request[2]

2321

2631

setattr(client_object, attrname, value)

2322

2632

2323

2633

return True

2324

2634

2325

2635

2326

2636

def rfc3339_duration_to_delta(duration):

2327

2637

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

2328

2638

2329

2639

>>> rfc3339_duration_to_delta("P7D")

2330

2640

datetime.timedelta(7)

2331

2641

>>> rfc3339_duration_to_delta("PT60S")

2341

2651

>>> rfc3339_duration_to_delta("P1DT3M20S")

2342

2652

datetime.timedelta(1, 200)

2343

2653

"""

2344

2654

2345

2655

# Parsing an RFC 3339 duration with regular expressions is not

2346

2656

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

2347

2657

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

2348

2658

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

2349

2659

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

2350

2660

# avoid excessive use of external libraries.

2351

2661

2352

2662

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

2353

2663

Token = collections.namedtuple("Token", (

2354

2664

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

2387

2697

frozenset((token_year, token_month,

2388

2698

token_day, token_time,

2389

2699

token_week)))

2390

# Define starting values

2391

value = datetime.timedelta() # Value so far

2700

# Define starting values:

2701

# Value so far

2702

value = datetime.timedelta()

2392

2703

found_token = None

2393

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

2394

s = duration # String left to parse

2704

# Following valid tokens

2705

followers = frozenset((token_duration, ))

2706

# String left to parse

2707

s = duration

2395

2708

# Loop until end token is found

2396

2709

while found_token is not token_end:

2397

2710

# Search for any currently valid tokens

2421

2734

2422

2735

def string_to_delta(interval):

2423

2736

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

2424

2737

2425

2738

>>> string_to_delta('7d')

2426

2739

datetime.timedelta(7)

2427

2740

>>> string_to_delta('60s')

2435

2748

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

2436

2749

datetime.timedelta(0, 330)

2437

2750

"""

2438

2751

2439

2752

try:

2440

2753

return rfc3339_duration_to_delta(interval)

2441

2754

except ValueError:

2442

2755

pass

2443

2756

2444

2757

timevalue = datetime.timedelta(0)

2445

2758

for s in interval.split():

2446

2759

try:

2464

2777

return timevalue

2465

2778

2466

2779

2467

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

2780

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

2468

2781

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

2469

2782

2470

2783

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

2471

2784

if os.fork():

2472

2785

sys.exit()

2490

2803

2491

2804

2492

2805

def main():

2493

2806

2494

2807

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

2495

2808

# Parsing of options, both command line and config file

2496

2809

2497

2810

parser = argparse.ArgumentParser()

2498

2811

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

2499

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

2812

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

2500

2813

help="show version number and exit")

2501

2814

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

2502

2815

help="Bind to interface IF")

2538

2851

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

2539

2852

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

2540

2853

default=None)

2541

2854

2542

2855

options = parser.parse_args()

2543

2856

2544

2857

if options.check:

2545

2858

import doctest

2546

2859

fail_count, test_count = doctest.testmod()

2547

2860

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

2548

2861

2549

2862

# Default values for config file for server-global settings

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

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

2568

2881

# Parse config file for server-global settings

2569

2882

server_config = configparser.SafeConfigParser(server_defaults)

2570

2883

del server_defaults

2572

2885

# Convert the SafeConfigParser object to a dict

2573

2886

server_settings = server_config.defaults()

2574

2887

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

2575

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

2888

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

2889

"foreground", "zeroconf"):

2576

2890

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

2577

2891

option)

2578

2892

if server_settings["port"]:

2588

2902

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

2589

2903

["socket"])

2590

2904

del server_config

2591

2905

2592

2906

# Override the settings from the config file with command line

2593

2907

# options, if set.

2594

2908

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

2612

2926

if server_settings["debug"]:

2613

2927

server_settings["foreground"] = True

2614

2928

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

2615

2929

2616

2930

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

2617

2931

2618

2932

if (not server_settings["zeroconf"]

2619

2933

and not (server_settings["port"]

2620

2934

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

2621

2935

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

2622

2936

2623

2937

# For convenience

2624

2938

debug = server_settings["debug"]

2625

2939

debuglevel = server_settings["debuglevel"]

2629

2943

stored_state_file)

2630

2944

foreground = server_settings["foreground"]

2631

2945

zeroconf = server_settings["zeroconf"]

2632

2946

2633

2947

if debug:

2634

2948

initlogger(debug, logging.DEBUG)

2635

2949

else:

2638

2952

else:

2639

2953

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

2640

2954

initlogger(debug, level)

2641

2955

2642

2956

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

2643

2957

syslogger.setFormatter(

2644

2958

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

2645

2959

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

2646

2960

server_settings["servicename"])))

2647

2961

2648

2962

# Parse config file with clients

2649

2963

client_config = configparser.SafeConfigParser(Client

2650

2964

.client_defaults)

2651

2965

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

2652

2966

"clients.conf"))

2653

2967

2654

2968

global mandos_dbus_service

2655

2969

mandos_dbus_service = None

2656

2970

2657

2971

socketfd = None

2658

2972

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

2659

2973

socketfd = server_settings["socket"]

2675

2989

except IOError as e:

2676

2990

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

2677

2991

exc_info=e)

2678

2679

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

2992

2993

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

2994

("mandos", "mandos"),

2995

("nobody", "nogroup")):

2680

2996

try:

2681

2997

uid = pwd.getpwnam(name).pw_uid

2682

gid = pwd.getpwnam(name).pw_gid

2998

gid = pwd.getpwnam(group).pw_gid

2683

2999

break

2684

3000

except KeyError:

2685

3001

continue

2689

3005

try:

2690

3006

os.setgid(gid)

2691

3007

os.setuid(uid)

3008

if debug:

3009

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

3010

gid))

2692

3011

except OSError as error:

3012

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

3013

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

2693

3014

if error.errno != errno.EPERM:

2694

3015

raise

2695

3016

2696

3017

if debug:

2697

3018

# Enable all possible GnuTLS debugging

2698

3019

2699

3020

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

2700

3021

# - GnuTLS manual

2701

gnutls.library.functions.gnutls_global_set_log_level(11)

2702

2703

@gnutls.library.types.gnutls_log_func

3022

gnutls.global_set_log_level(11)

3023

3024

@gnutls.log_func

2704

3025

def debug_gnutls(level, string):

2705

3026

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

2706

2707

gnutls.library.functions.gnutls_global_set_log_function(

2708

debug_gnutls)

2709

3027

3028

gnutls.global_set_log_function(debug_gnutls)

3029

2710

3030

# Redirect stdin so all checkers get /dev/null

2711

3031

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

2712

3032

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

2713

3033

if null > 2:

2714

3034

os.close(null)

2715

3035

2716

3036

# Need to fork before connecting to D-Bus

2717

3037

if not foreground:

2718

3038

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

2719

3039

daemon()

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

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

2725

3045

global main_loop

2726

3046

# From the Avahi example code

2727

3047

DBusGMainLoop(set_as_default=True)

2728

main_loop = gobject.MainLoop()

3048

main_loop = GLib.MainLoop()

2729

3049

bus = dbus.SystemBus()

2730

3050

# End of Avahi example code

2731

3051

if use_dbus:

2744

3064

if zeroconf:

2745

3065

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2746

3066

service = AvahiServiceToSyslog(

2747

name = server_settings["servicename"],

2748

servicetype = "_mandos._tcp",

2749

protocol = protocol,

2750

bus = bus)

3067

name=server_settings["servicename"],

3068

servicetype="_mandos._tcp",

3069

protocol=protocol,

3070

bus=bus)

2751

3071

if server_settings["interface"]:

2752

3072

service.interface = if_nametoindex(

2753

3073

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

2754

3074

2755

3075

global multiprocessing_manager

2756

3076

multiprocessing_manager = multiprocessing.Manager()

2757

3077

2758

3078

client_class = Client

2759

3079

if use_dbus:

2760

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

2761

3080

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

3081

2762

3082

client_settings = Client.config_parser(client_config)

2763

3083

old_client_settings = {}

2764

3084

clients_data = {}

2765

3085

2766

3086

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

2767

3087

global wnull

2768

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

3088

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

2769

3089

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

2770

3090

# mode

2771

3091

if debug or not foreground:

2772

3092

wnull.close()

2773

3093

2774

3094

# Get client data and settings from last running state.

2775

3095

if server_settings["restore"]:

2776

3096

try:

2777

3097

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

2778

clients_data, old_client_settings = pickle.load(

2779

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"))

2780

3143

os.remove(stored_state_path)

2781

3144

except IOError as e:

2782

3145

if e.errno == errno.ENOENT:

2790

3153

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

2791

3154

"EOFError:",

2792

3155

exc_info=e)

2793

3156

2794

3157

with PGPEngine() as pgp:

2795

3158

for client_name, client in clients_data.items():

2796

3159

# Skip removed clients

2797

3160

if client_name not in client_settings:

2798

3161

continue

2799

3162

2800

3163

# Decide which value to use after restoring saved state.

2801

3164

# We have three different values: Old config file,

2802

3165

# new config file, and saved state.

2813

3176

client[name] = value

2814

3177

except KeyError:

2815

3178

pass

2816

3179

2817

3180

# Clients who has passed its expire date can still be

2818

3181

# enabled if its last checker was successful. A Client

2819

3182

# whose checker succeeded before we stored its state is

2852

3215

client_name))

2853

3216

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

2854

3217

["secret"])

2855

3218

2856

3219

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

2857

3220

for client_name in (set(old_client_settings)

2858

3221

- set(client_settings)):

2860

3223

for client_name in (set(client_settings)

2861

3224

- set(old_client_settings)):

2862

3225

clients_data[client_name] = client_settings[client_name]

2863

3226

2864

3227

# Create all client objects

2865

3228

for client_name, client in clients_data.items():

2866

3229

tcp_server.clients[client_name] = client_class(

2867

name = client_name,

2868

settings = client,

2869

server_settings = server_settings)

2870

3230

name=client_name,

3231

settings=client,

3232

server_settings=server_settings)

3233

2871

3234

if not tcp_server.clients:

2872

3235

logger.warning("No clients defined")

2873

3236

2874

3237

if not foreground:

2875

3238

if pidfile is not None:

2876

3239

pid = os.getpid()

2882

3245

pidfilename, pid)

2883

3246

del pidfile

2884

3247

del pidfilename

2885

2886

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

2887

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

2888

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

2889

3253

if use_dbus:

2890

3254

2891

3255

@alternate_dbus_interfaces(

2892

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

3256

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

2893

3257

class MandosDBusService(DBusObjectWithObjectManager):

2894

3258

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

2895

3259

2896

3260

def __init__(self):

2897

3261

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

2898

3262

2899

3263

_interface = "se.recompile.Mandos"

2900

3264

2901

3265

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

2902

3266

def ClientAdded(self, objpath):

2903

3267

"D-Bus signal"

2904

3268

pass

2905

3269

2906

3270

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

2907

3271

def ClientNotFound(self, fingerprint, address):

2908

3272

"D-Bus signal"

2909

3273

pass

2910

3274

2911

3275

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

2912

3276

"true"})

2913

3277

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

2914

3278

def ClientRemoved(self, objpath, name):

2915

3279

"D-Bus signal"

2916

3280

pass

2917

3281

2918

3282

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

2919

3283

"true"})

2920

3284

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

2921

3285

def GetAllClients(self):

2922

3286

"D-Bus method"

2923

3287

return dbus.Array(c.dbus_object_path for c in

2924

tcp_server.clients.itervalues())

2925

3288

tcp_server.clients.values())

3289

2926

3290

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

2927

3291

"true"})

2928

3292

@dbus.service.method(_interface,

2930

3294

def GetAllClientsWithProperties(self):

2931

3295

"D-Bus method"

2932

3296

return dbus.Dictionary(

2933

{ c.dbus_object_path: c.GetAll(

3297

{c.dbus_object_path: c.GetAll(

2934

3298

"se.recompile.Mandos.Client")

2935

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

3299

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

2936

3300

signature="oa{sv}")

2937

3301

2938

3302

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

2939

3303

def RemoveClient(self, object_path):

2940

3304

"D-Bus method"

2941

for c in tcp_server.clients.itervalues():

3305

for c in tcp_server.clients.values():

2942

3306

if c.dbus_object_path == object_path:

2943

3307

del tcp_server.clients[c.name]

2944

3308

c.remove_from_connection()

2948

3312

self.client_removed_signal(c)

2949

3313

return

2950

3314

raise KeyError(object_path)

2951

3315

2952

3316

del _interface

2953

3317

2954

3318

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

2955

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

3319

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

2956

3320

def GetManagedObjects(self):

2957

3321

"""D-Bus method"""

2958

3322

return dbus.Dictionary(

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

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

2966

3330

def client_added_signal(self, client):

2967

3331

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

2968

3332

if use_dbus:

2970

3334

self.InterfacesAdded(

2971

3335

client.dbus_object_path,

2972

3336

dbus.Dictionary(

2973

{ interface: client.GetAll(interface)

2974

for interface in

2975

client._get_all_interface_names()}))

3337

{interface: client.GetAll(interface)

3338

for interface in

3339

client._get_all_interface_names()}))

2976

3340

# Old signal

2977

3341

self.ClientAdded(client.dbus_object_path)

2978

3342

2979

3343

def client_removed_signal(self, client):

2980

3344

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

2981

3345

if use_dbus:

2986

3350

# Old signal

2987

3351

self.ClientRemoved(client.dbus_object_path,

2988

3352

client.name)

2989

3353

2990

3354

mandos_dbus_service = MandosDBusService()

2991

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

2992

3361

def cleanup():

2993

3362

"Cleanup function; run on exit"

2994

3363

if zeroconf:

2995

3364

service.cleanup()

2996

2997

multiprocessing.active_children()

2998

wnull.close()

3365

3366

mp.active_children()

3367

wn.close()

2999

3368

if not (tcp_server.clients or client_settings):

3000

3369

return

3001

3370

3002

3371

# Store client before exiting. Secrets are encrypted with key

3003

3372

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

3004

3373

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

3005

3374

clients = {}

3006

3375

with PGPEngine() as pgp:

3007

for client in tcp_server.clients.itervalues():

3376

for client in tcp_server.clients.values():

3008

3377

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

3009

3378

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

3010

3379

key)

3011

3380

client_dict = {}

3012

3381

3013

3382

# A list of attributes that can not be pickled

3014

3383

# + secret.

3015

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

3016

"checker", "server_settings" }

3384

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

3385

"checker", "server_settings"}

3017

3386

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

3018

3387

.Object):

3019

3388

exclude.add(name)

3020

3389

3021

3390

client_dict["encrypted_secret"] = (client

3022

3391

.encrypted_secret)

3023

3392

for attr in client.client_structure:

3024

3393

if attr not in exclude:

3025

3394

client_dict[attr] = getattr(client, attr)

3026

3395

3027

3396

clients[client.name] = client_dict

3028

3397

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

3029

3398

3030

3399

try:

3031

3400

with tempfile.NamedTemporaryFile(

3032

3401

mode='wb',

3034

3403

prefix='clients-',

3035

3404

dir=os.path.dirname(stored_state_path),

3036

3405

delete=False) as stored_state:

3037

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

3406

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

3407

protocol=2)

3038

3408

tempname = stored_state.name

3039

3409

os.rename(tempname, stored_state_path)

3040

3410

except (IOError, OSError) as e:

3050

3420

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

3051

3421

exc_info=e)

3052

3422

raise

3053

3423

3054

3424

# Delete all clients, and settings from config

3055

3425

while tcp_server.clients:

3056

3426

name, client = tcp_server.clients.popitem()

3059

3429

# Don't signal the disabling

3060

3430

client.disable(quiet=True)

3061

3431

# Emit D-Bus signal for removal

3062

mandos_dbus_service.client_removed_signal(client)

3432

if use_dbus:

3433

mandos_dbus_service.client_removed_signal(client)

3063

3434

client_settings.clear()

3064

3435

3065

3436

atexit.register(cleanup)

3066

3067

for client in tcp_server.clients.itervalues():

3437

3438

for client in tcp_server.clients.values():

3068

3439

if use_dbus:

3069

3440

# Emit D-Bus signal for adding

3070

3441

mandos_dbus_service.client_added_signal(client)

3071

3442

# Need to initiate checking of clients

3072

3443

if client.enabled:

3073

3444

client.init_checker()

3074

3445

3075

3446

tcp_server.enable()

3076

3447

tcp_server.server_activate()

3077

3448

3078

3449

# Find out what port we got

3079

3450

if zeroconf:

3080

3451

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

3085

3456

else: # IPv4

3086

3457

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

3087

3458

*tcp_server.socket.getsockname())

3088

3089

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

3090

3459

3460

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

3461

3091

3462

try:

3092

3463

if zeroconf:

3093

3464

# From the Avahi example code

3098

3469

cleanup()

3099

3470

sys.exit(1)

3100

3471

# End of Avahi example code

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

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

3107

3478

logger.debug("Starting main loop")

3108

3479

main_loop.run()

3109

3480

except AvahiError as error: