/mandos/release : revision 237.7.317

1

#!/usr/bin/python3 -bI

2

# -*- mode: python; after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); coding: utf-8 -*-

3

#

1

#!/usr/bin/python2.7

2

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

3

#

4

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

5

#

5

#

6

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

7

# service publisher, downloaded from

8

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

9

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

10

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

11

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

12

#

12

#

13

# Everything else is

14

15

16

#

17

# This file is part of Mandos.

18

#

19

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

20

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

14

15

16

#

17

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

18

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

21

19

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

22

20

# (at your option) any later version.

23

21

#

24

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

25

# WITHOUT ANY WARRANTY; without even the implied warranty of

22

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

23

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

26

24

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

27

25

# GNU General Public License for more details.

28

#

26

#

29

27

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

30

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

31

#

28

# along with this program. If not, see

29

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

30

#

32

31

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

33

#

32

#

34

33

35

34

from __future__ import (division, absolute_import, print_function,

36

35

unicode_literals)

37

36

38

try:

39

from future_builtins import *

40

except ImportError:

41

pass

37

from future_builtins import *

42

38

43

39

try:

44

40

import SocketServer as socketserver

48

44

import argparse

49

45

import datetime

50

46

import errno

47

import gnutls.crypto

48

import gnutls.connection

49

import gnutls.errors

50

import gnutls.library.functions

51

import gnutls.library.constants

52

import gnutls.library.types

51

53

try:

52

54

import ConfigParser as configparser

53

55

except ImportError:

77

79

import itertools

78

80

import collections

79

81

import codecs

80

import unittest

81

import random

82

import shlex

83

82

84

83

import dbus

85

84

import dbus.service

86

import gi

87

from gi.repository import GLib

85

try:

86

import gobject

87

except ImportError:

88

from gi.repository import GObject as gobject

89

import avahi

88

90

from dbus.mainloop.glib import DBusGMainLoop

89

91

import ctypes

90

92

import ctypes.util

91

93

import xml.dom.minidom

92

94

import inspect

93

95

94

if sys.version_info.major == 2:

95

__metaclass__ = type

96

str = unicode

97

98

# Add collections.abc.Callable if it does not exist

99

try:

100

collections.abc.Callable

101

except AttributeError:

102

class abc:

103

Callable = collections.Callable

104

collections.abc = abc

105

del abc

106

107

# Add shlex.quote if it does not exist

108

try:

109

shlex.quote

110

except AttributeError:

111

shlex.quote = re.escape

112

113

# Show warnings by default

114

if not sys.warnoptions:

115

import warnings

116

warnings.simplefilter("default")

117

118

# Try to find the value of SO_BINDTODEVICE:

119

try:

120

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

121

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

96

try:

122

97

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

123

98

except AttributeError:

124

99

try:

125

# This is where SO_BINDTODEVICE was up to and including Python

126

# 2.6, and also 3.2:

127

100

from IN import SO_BINDTODEVICE

128

101

except ImportError:

129

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

130

# Try running the C preprocessor:

131

try:

132

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

133

"/dev/stdin"],

134

stdin=subprocess.PIPE,

135

stdout=subprocess.PIPE)

136

stdout = cc.communicate(

137

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

138

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

139

except (OSError, ValueError, IndexError):

140

# No value found

141

SO_BINDTODEVICE = None

142

143

if sys.version_info < (3, 2):

144

configparser.Configparser = configparser.SafeConfigParser

145

146

version = "1.8.9"

102

SO_BINDTODEVICE = None

103

104

if sys.version_info.major == 2:

105

str = unicode

106

107

version = "1.6.9"

147

108

stored_state_file = "clients.pickle"

148

109

149

110

logger = logging.getLogger()

150

logging.captureWarnings(True) # Show warnings via the logging system

151

111

syslogger = None

152

112

153

113

try:

154

114

if_nametoindex = ctypes.cdll.LoadLibrary(

155

115

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

156

116

except (OSError, AttributeError):

157

117

158

118

def if_nametoindex(interface):

159

119

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

160

120

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

165

125

return interface_index

166

126

167

127

168

def copy_function(func):

169

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

170

if sys.version_info.major == 2:

171

return types.FunctionType(func.func_code,

172

func.func_globals,

173

func.func_name,

174

func.func_defaults,

175

func.func_closure)

176

else:

177

return types.FunctionType(func.__code__,

178

func.__globals__,

179

func.__name__,

180

func.__defaults__,

181

func.__closure__)

182

183

184

128

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

185

129

"""init logger and add loglevel"""

186

130

187

131

global syslogger

188

132

syslogger = (logging.handlers.SysLogHandler(

189

facility=logging.handlers.SysLogHandler.LOG_DAEMON,

190

address="/dev/log"))

133

facility = logging.handlers.SysLogHandler.LOG_DAEMON,

134

address = "/dev/log"))

191

135

syslogger.setFormatter(logging.Formatter

192

136

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

193

137

' %(message)s'))

194

138

logger.addHandler(syslogger)

195

139

196

140

if debug:

197

141

console = logging.StreamHandler()

198

142

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

208

152

pass

209

153

210

154

211

class PGPEngine:

155

class PGPEngine(object):

212

156

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

213

157

214

158

def __init__(self):

215

159

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

216

self.gpg = "gpg"

217

try:

218

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

219

for line in output.splitlines():

220

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

221

if name == b"gpg":

222

self.gpg = path

223

break

224

except OSError as e:

225

if e.errno != errno.ENOENT:

226

raise

227

160

self.gnupgargs = ['--batch',

228

'--homedir', self.tempdir,

161

'--home', self.tempdir,

229

162

'--force-mdc',

230

'--quiet']

231

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

232

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

233

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

234

163

'--quiet',

164

'--no-use-agent']

165

235

166

def __enter__(self):

236

167

return self

237

168

238

169

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

239

170

self._cleanup()

240

171

return False

241

172

242

173

def __del__(self):

243

174

self._cleanup()

244

175

245

176

def _cleanup(self):

246

177

if self.tempdir is not None:

247

178

# Delete contents of tempdir

248

179

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

249

topdown=False):

180

topdown = False):

250

181

for filename in files:

251

182

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

252

183

for dirname in dirs:

254

185

# Remove tempdir

255

186

os.rmdir(self.tempdir)

256

187

self.tempdir = None

257

188

258

189

def password_encode(self, password):

259

190

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

260

191

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

265

196

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

266

197

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

267

198

return encoded

268

199

269

200

def encrypt(self, data, password):

270

201

passphrase = self.password_encode(password)

271

202

with tempfile.NamedTemporaryFile(

272

203

dir=self.tempdir) as passfile:

273

204

passfile.write(passphrase)

274

205

passfile.flush()

275

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

206

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

276

207

'--passphrase-file',

277

208

passfile.name]

278

209

+ self.gnupgargs,

279

stdin=subprocess.PIPE,

280

stdout=subprocess.PIPE,

281

stderr=subprocess.PIPE)

282

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

210

stdin = subprocess.PIPE,

211

stdout = subprocess.PIPE,

212

stderr = subprocess.PIPE)

213

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

283

214

if proc.returncode != 0:

284

215

raise PGPError(err)

285

216

return ciphertext

286

217

287

218

def decrypt(self, data, password):

288

219

passphrase = self.password_encode(password)

289

220

with tempfile.NamedTemporaryFile(

290

dir=self.tempdir) as passfile:

221

dir = self.tempdir) as passfile:

291

222

passfile.write(passphrase)

292

223

passfile.flush()

293

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

224

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

294

225

'--passphrase-file',

295

226

passfile.name]

296

227

+ self.gnupgargs,

297

stdin=subprocess.PIPE,

298

stdout=subprocess.PIPE,

299

stderr=subprocess.PIPE)

300

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

228

stdin = subprocess.PIPE,

229

stdout = subprocess.PIPE,

230

stderr = subprocess.PIPE)

231

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

301

232

if proc.returncode != 0:

302

233

raise PGPError(err)

303

234

return decrypted_plaintext

304

235

305

236

306

# Pretend that we have an Avahi module

307

class avahi:

308

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

309

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

310

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

311

PROTO_INET = 0 # avahi-common/address.h

312

PROTO_INET6 = 1 # avahi-common/address.h

313

DBUS_NAME = "org.freedesktop.Avahi"

314

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

315

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

316

DBUS_PATH_SERVER = "/"

317

318

@staticmethod

319

def string_array_to_txt_array(t):

320

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

321

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

322

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

323

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

324

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

325

SERVER_INVALID = 0 # avahi-common/defs.h

326

SERVER_REGISTERING = 1 # avahi-common/defs.h

327

SERVER_RUNNING = 2 # avahi-common/defs.h

328

SERVER_COLLISION = 3 # avahi-common/defs.h

329

SERVER_FAILURE = 4 # avahi-common/defs.h

330

331

332

237

class AvahiError(Exception):

333

238

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

334

239

self.value = value

344

249

pass

345

250

346

251

347

class AvahiService:

252

class AvahiService(object):

348

253

"""An Avahi (Zeroconf) service.

349

254

350

255

Attributes:

351

256

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

352

257

Used to optionally bind to the specified interface.

364

269

server: D-Bus Server

365

270

bus: dbus.SystemBus()

366

271

"""

367

272

368

273

def __init__(self,

369

interface=avahi.IF_UNSPEC,

370

name=None,

371

servicetype=None,

372

port=None,

373

TXT=None,

374

domain="",

375

host="",

376

max_renames=32768,

377

protocol=avahi.PROTO_UNSPEC,

378

bus=None):

274

interface = avahi.IF_UNSPEC,

275

name = None,

276

servicetype = None,

277

port = None,

278

TXT = None,

279

domain = "",

280

host = "",

281

max_renames = 32768,

282

protocol = avahi.PROTO_UNSPEC,

283

bus = None):

379

284

self.interface = interface

380

285

self.name = name

381

286

self.type = servicetype

390

295

self.server = None

391

296

self.bus = bus

392

297

self.entry_group_state_changed_match = None

393

298

394

299

def rename(self, remove=True):

395

300

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

396

301

if self.rename_count >= self.max_renames:

416

321

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

417

322

self.cleanup()

418

323

os._exit(1)

419

324

420

325

def remove(self):

421

326

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

422

327

if self.entry_group_state_changed_match is not None:

424

329

self.entry_group_state_changed_match = None

425

330

if self.group is not None:

426

331

self.group.Reset()

427

332

428

333

def add(self):

429

334

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

430

335

self.remove()

447

352

dbus.UInt16(self.port),

448

353

avahi.string_array_to_txt_array(self.TXT))

449

354

self.group.Commit()

450

355

451

356

def entry_group_state_changed(self, state, error):

452

357

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

453

358

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

454

359

455

360

if state == avahi.ENTRY_GROUP_ESTABLISHED:

456

361

logger.debug("Zeroconf service established.")

457

362

elif state == avahi.ENTRY_GROUP_COLLISION:

461

366

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

462

367

str(error))

463

368

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

464

369

465

370

def cleanup(self):

466

371

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

467

372

if self.group is not None:

472

377

pass

473

378

self.group = None

474

379

self.remove()

475

380

476

381

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

477

382

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

478

383

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

507

412

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

508

413

else:

509

414

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

510

415

511

416

def activate(self):

512

417

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

513

418

if self.server is None:

524

429

class AvahiServiceToSyslog(AvahiService):

525

430

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

526

431

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

527

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

432

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

528

433

syslogger.setFormatter(logging.Formatter(

529

434

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

530

435

.format(self.name)))

531

436

return ret

532

437

533

534

# Pretend that we have a GnuTLS module

535

class gnutls:

536

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

537

538

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

539

if library is None:

540

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

541

_library = ctypes.cdll.LoadLibrary(library)

542

del library

543

544

# Unless otherwise indicated, the constants and types below are

545

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

546

547

# Constants

548

E_SUCCESS = 0

549

E_INTERRUPTED = -52

550

E_AGAIN = -28

551

CRT_OPENPGP = 2

552

CRT_RAWPK = 3

553

CLIENT = 2

554

SHUT_RDWR = 0

555

CRD_CERTIFICATE = 1

556

E_NO_CERTIFICATE_FOUND = -49

557

X509_FMT_DER = 0

558

NO_TICKETS = 1<<10

559

ENABLE_RAWPK = 1<<18

560

CTYPE_PEERS = 3

561

KEYID_USE_SHA256 = 1 # gnutls/x509.h

562

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

563

564

# Types

565

class session_int(ctypes.Structure):

566

_fields_ = []

567

session_t = ctypes.POINTER(session_int)

568

569

class certificate_credentials_st(ctypes.Structure):

570

_fields_ = []

571

certificate_credentials_t = ctypes.POINTER(

572

certificate_credentials_st)

573

certificate_type_t = ctypes.c_int

574

575

class datum_t(ctypes.Structure):

576

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

577

('size', ctypes.c_uint)]

578

579

class openpgp_crt_int(ctypes.Structure):

580

_fields_ = []

581

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

582

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

583

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

584

credentials_type_t = ctypes.c_int

585

transport_ptr_t = ctypes.c_void_p

586

close_request_t = ctypes.c_int

587

588

# Exceptions

589

class Error(Exception):

590

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

591

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

592

# code is passed, convert it to a string with

593

# gnutls.strerror()

594

self.code = code

595

if message is None and code is not None:

596

message = gnutls.strerror(code)

597

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

598

message, *args)

599

600

class CertificateSecurityError(Error):

601

pass

602

603

# Classes

604

class Credentials:

605

def __init__(self):

606

self._c_object = gnutls.certificate_credentials_t()

607

gnutls.certificate_allocate_credentials(

608

ctypes.byref(self._c_object))

609

self.type = gnutls.CRD_CERTIFICATE

610

611

def __del__(self):

612

gnutls.certificate_free_credentials(self._c_object)

613

614

class ClientSession:

615

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

616

self._c_object = gnutls.session_t()

617

gnutls_flags = gnutls.CLIENT

618

if gnutls.check_version(b"3.5.6"):

619

gnutls_flags |= gnutls.NO_TICKETS

620

if gnutls.has_rawpk:

621

gnutls_flags |= gnutls.ENABLE_RAWPK

622

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

623

del gnutls_flags

624

gnutls.set_default_priority(self._c_object)

625

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

626

gnutls.handshake_set_private_extensions(self._c_object,

627

True)

628

self.socket = socket

629

if credentials is None:

630

credentials = gnutls.Credentials()

631

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

632

ctypes.cast(credentials._c_object,

633

ctypes.c_void_p))

634

self.credentials = credentials

635

636

def __del__(self):

637

gnutls.deinit(self._c_object)

638

639

def handshake(self):

640

return gnutls.handshake(self._c_object)

641

642

def send(self, data):

643

data = bytes(data)

644

data_len = len(data)

645

while data_len > 0:

646

data_len -= gnutls.record_send(self._c_object,

647

data[-data_len:],

648

data_len)

649

650

def bye(self):

651

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

652

653

# Error handling functions

654

def _error_code(result):

655

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

656

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

657

if result >= 0:

658

return result

659

if result == gnutls.E_NO_CERTIFICATE_FOUND:

660

raise gnutls.CertificateSecurityError(code=result)

661

raise gnutls.Error(code=result)

662

663

def _retry_on_error(result, func, arguments):

664

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

665

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

666

while result < 0:

667

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

668

return _error_code(result)

669

result = func(*arguments)

670

return result

671

672

# Unless otherwise indicated, the function declarations below are

673

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

674

675

# Functions

676

priority_set_direct = _library.gnutls_priority_set_direct

677

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

678

ctypes.POINTER(ctypes.c_char_p)]

679

priority_set_direct.restype = _error_code

680

681

init = _library.gnutls_init

682

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

683

init.restype = _error_code

684

685

set_default_priority = _library.gnutls_set_default_priority

686

set_default_priority.argtypes = [session_t]

687

set_default_priority.restype = _error_code

688

689

record_send = _library.gnutls_record_send

690

record_send.argtypes = [session_t, ctypes.c_void_p,

691

ctypes.c_size_t]

692

record_send.restype = ctypes.c_ssize_t

693

record_send.errcheck = _retry_on_error

694

695

certificate_allocate_credentials = (

696

_library.gnutls_certificate_allocate_credentials)

697

certificate_allocate_credentials.argtypes = [

698

ctypes.POINTER(certificate_credentials_t)]

699

certificate_allocate_credentials.restype = _error_code

700

701

certificate_free_credentials = (

702

_library.gnutls_certificate_free_credentials)

703

certificate_free_credentials.argtypes = [

704

certificate_credentials_t]

705

certificate_free_credentials.restype = None

706

707

handshake_set_private_extensions = (

708

_library.gnutls_handshake_set_private_extensions)

709

handshake_set_private_extensions.argtypes = [session_t,

710

ctypes.c_int]

711

handshake_set_private_extensions.restype = None

712

713

credentials_set = _library.gnutls_credentials_set

714

credentials_set.argtypes = [session_t, credentials_type_t,

715

ctypes.c_void_p]

716

credentials_set.restype = _error_code

717

718

strerror = _library.gnutls_strerror

719

strerror.argtypes = [ctypes.c_int]

720

strerror.restype = ctypes.c_char_p

721

722

certificate_type_get = _library.gnutls_certificate_type_get

723

certificate_type_get.argtypes = [session_t]

724

certificate_type_get.restype = _error_code

725

726

certificate_get_peers = _library.gnutls_certificate_get_peers

727

certificate_get_peers.argtypes = [session_t,

728

ctypes.POINTER(ctypes.c_uint)]

729

certificate_get_peers.restype = ctypes.POINTER(datum_t)

730

731

global_set_log_level = _library.gnutls_global_set_log_level

732

global_set_log_level.argtypes = [ctypes.c_int]

733

global_set_log_level.restype = None

734

735

global_set_log_function = _library.gnutls_global_set_log_function

736

global_set_log_function.argtypes = [log_func]

737

global_set_log_function.restype = None

738

739

deinit = _library.gnutls_deinit

740

deinit.argtypes = [session_t]

741

deinit.restype = None

742

743

handshake = _library.gnutls_handshake

744

handshake.argtypes = [session_t]

745

handshake.restype = _error_code

746

handshake.errcheck = _retry_on_error

747

748

transport_set_ptr = _library.gnutls_transport_set_ptr

749

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

750

transport_set_ptr.restype = None

751

752

bye = _library.gnutls_bye

753

bye.argtypes = [session_t, close_request_t]

754

bye.restype = _error_code

755

bye.errcheck = _retry_on_error

756

757

check_version = _library.gnutls_check_version

758

check_version.argtypes = [ctypes.c_char_p]

759

check_version.restype = ctypes.c_char_p

760

761

_need_version = b"3.3.0"

762

if check_version(_need_version) is None:

763

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

764

.format(_need_version))

765

766

_tls_rawpk_version = b"3.6.6"

767

has_rawpk = bool(check_version(_tls_rawpk_version))

768

769

if has_rawpk:

770

# Types

771

class pubkey_st(ctypes.Structure):

772

_fields = []

773

pubkey_t = ctypes.POINTER(pubkey_st)

774

775

x509_crt_fmt_t = ctypes.c_int

776

777

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

778

pubkey_init = _library.gnutls_pubkey_init

779

pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]

780

pubkey_init.restype = _error_code

781

782

pubkey_import = _library.gnutls_pubkey_import

783

pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),

784

x509_crt_fmt_t]

785

pubkey_import.restype = _error_code

786

787

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

788

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

789

ctypes.POINTER(ctypes.c_ubyte),

790

ctypes.POINTER(ctypes.c_size_t)]

791

pubkey_get_key_id.restype = _error_code

792

793

pubkey_deinit = _library.gnutls_pubkey_deinit

794

pubkey_deinit.argtypes = [pubkey_t]

795

pubkey_deinit.restype = None

796

else:

797

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

798

799

openpgp_crt_init = _library.gnutls_openpgp_crt_init

800

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

801

openpgp_crt_init.restype = _error_code

802

803

openpgp_crt_import = _library.gnutls_openpgp_crt_import

804

openpgp_crt_import.argtypes = [openpgp_crt_t,

805

ctypes.POINTER(datum_t),

806

openpgp_crt_fmt_t]

807

openpgp_crt_import.restype = _error_code

808

809

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

810

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

811

ctypes.POINTER(ctypes.c_uint)]

812

openpgp_crt_verify_self.restype = _error_code

813

814

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

815

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

816

openpgp_crt_deinit.restype = None

817

818

openpgp_crt_get_fingerprint = (

819

_library.gnutls_openpgp_crt_get_fingerprint)

820

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

821

ctypes.c_void_p,

822

ctypes.POINTER(

823

ctypes.c_size_t)]

824

openpgp_crt_get_fingerprint.restype = _error_code

825

826

if check_version(b"3.6.4"):

827

certificate_type_get2 = _library.gnutls_certificate_type_get2

828

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

829

certificate_type_get2.restype = _error_code

830

831

# Remove non-public functions

832

del _error_code, _retry_on_error

833

834

835

438

def call_pipe(connection, # : multiprocessing.Connection

836

439

func, *args, **kwargs):

837

440

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

838

441

839

442

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

840

443

return value on the provided multiprocessing.Connection.

841

444

"""

842

445

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

843

446

connection.close()

844

447

845

846

class Client:

448

class Client(object):

847

449

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

848

450

849

451

Attributes:

850

452

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

851

453

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

852

454

approval_duration: datetime.timedelta(); Duration of one approval

853

checker: multiprocessing.Process(); a running checker process used

854

to see if the client lives. 'None' if no process is

855

running.

856

checker_callback_tag: a GLib event source tag, or None

455

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

456

to see if the client lives.

457

'None' if no process is running.

458

checker_callback_tag: a gobject event source tag, or None

857

459

checker_command: string; External command which is run to check

858

460

if client lives. %() expansions are done at

859

461

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

860

462

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

861

checker_initiator_tag: a GLib event source tag, or None

463

checker_initiator_tag: a gobject event source tag, or None

862

464

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

863

465

client_structure: Object describing what attributes a client has

864

466

and is used for storing the client at exit

865

467

current_checker_command: string; current running checker_command

866

disable_initiator_tag: a GLib event source tag, or None

468

disable_initiator_tag: a gobject event source tag, or None

867

469

enabled: bool()

868

470

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

869

uniquely identify an OpenPGP client

870

key_id: string (64 hexadecimal digits); used to uniquely identify

871

a client using raw public keys

471

uniquely identify the client

872

472

host: string; available for use by the checker command

873

473

interval: datetime.timedelta(); How often to start a new checker

874

474

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

890

490

disabled, or None

891

491

server_settings: The server_settings dict from main()

892

492

"""

893

493

894

494

runtime_expansions = ("approval_delay", "approval_duration",

895

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

495

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

896

496

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

897

497

"last_approval_request", "last_checked_ok",

898

498

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

907

507

"approved_by_default": "True",

908

508

"enabled": "True",

909

509

}

910

510

911

511

@staticmethod

912

512

def config_parser(config):

913

513

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

920

520

for client_name in config.sections():

921

521

section = dict(config.items(client_name))

922

522

client = settings[client_name] = {}

923

523

924

524

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

925

525

# Reformat values from string types to Python types

926

526

client["approved_by_default"] = config.getboolean(

927

527

client_name, "approved_by_default")

928

528

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

929

529

"enabled")

930

931

# Uppercase and remove spaces from key_id and fingerprint

932

# for later comparison purposes with return value from the

933

# key_id() and fingerprint() functions

934

client["key_id"] = (section.get("key_id", "").upper()

935

.replace(" ", ""))

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

936

534

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

937

535

.replace(" ", ""))

938

536

if "secret" in section:

939

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

940

.encode("utf-8"),

941

"base64")

537

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

942

538

elif "secfile" in section:

943

539

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

944

540

(section["secfile"])),

959

555

client["last_approval_request"] = None

960

556

client["last_checked_ok"] = None

961

557

client["last_checker_status"] = -2

962

558

963

559

return settings

964

965

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

560

561

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

966

562

self.name = name

967

563

if server_settings is None:

968

564

server_settings = {}

970

566

# adding all client settings

971

567

for setting, value in settings.items():

972

568

setattr(self, setting, value)

973

569

974

570

if self.enabled:

975

571

if not hasattr(self, "last_enabled"):

976

572

self.last_enabled = datetime.datetime.utcnow()

980

576

else:

981

577

self.last_enabled = None

982

578

self.expires = None

983

579

984

580

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

985

logger.debug(" Key ID: %s", self.key_id)

986

581

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

987

582

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

988

583

datetime.datetime.utcnow())

989

584

990

585

# attributes specific for this server instance

991

586

self.checker = None

992

587

self.checker_initiator_tag = None

998

593

self.changedstate = multiprocessing_manager.Condition(

999

594

multiprocessing_manager.Lock())

1000

595

self.client_structure = [attr

1001

for attr in self.__dict__.keys()

596

for attr in self.__dict__.iterkeys()

1002

597

if not attr.startswith("_")]

1003

598

self.client_structure.append("client_structure")

1004

599

1005

600

for name, t in inspect.getmembers(

1006

601

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

1007

602

if not name.startswith("_"):

1008

603

self.client_structure.append(name)

1009

604

1010

605

# Send notice to process children that client state has changed

1011

606

def send_changedstate(self):

1012

607

with self.changedstate:

1013

608

self.changedstate.notify_all()

1014

609

1015

610

def enable(self):

1016

611

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

1017

612

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

1022

617

self.last_enabled = datetime.datetime.utcnow()

1023

618

self.init_checker()

1024

619

self.send_changedstate()

1025

620

1026

621

def disable(self, quiet=True):

1027

622

"""Disable this client."""

1028

623

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

1030

625

if not quiet:

1031

626

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

1032

627

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

1033

GLib.source_remove(self.disable_initiator_tag)

628

gobject.source_remove(self.disable_initiator_tag)

1034

629

self.disable_initiator_tag = None

1035

630

self.expires = None

1036

631

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

1037

GLib.source_remove(self.checker_initiator_tag)

632

gobject.source_remove(self.checker_initiator_tag)

1038

633

self.checker_initiator_tag = None

1039

634

self.stop_checker()

1040

635

self.enabled = False

1041

636

if not quiet:

1042

637

self.send_changedstate()

1043

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

638

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

1044

639

return False

1045

640

1046

641

def __del__(self):

1047

642

self.disable()

1048

643

1049

644

def init_checker(self):

1050

645

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

1051

646

# and every interval from then on.

1052

647

if self.checker_initiator_tag is not None:

1053

GLib.source_remove(self.checker_initiator_tag)

1054

self.checker_initiator_tag = GLib.timeout_add(

1055

random.randrange(int(self.interval.total_seconds() * 1000

1056

+ 1)),

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

650

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

1057

651

self.start_checker)

1058

652

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

1059

653

if self.disable_initiator_tag is not None:

1060

GLib.source_remove(self.disable_initiator_tag)

1061

self.disable_initiator_tag = GLib.timeout_add(

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

1062

656

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

1063

657

# Also start a new checker *right now*.

1064

658

self.start_checker()

1065

659

1066

660

def checker_callback(self, source, condition, connection,

1067

661

command):

1068

662

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

663

self.checker_callback_tag = None

664

self.checker = None

1069

665

# Read return code from connection (see call_pipe)

1070

666

returncode = connection.recv()

1071

667

connection.close()

1072

if self.checker is not None:

1073

self.checker.join()

1074

self.checker_callback_tag = None

1075

self.checker = None

1076

668

1077

669

if returncode >= 0:

1078

670

self.last_checker_status = returncode

1079

671

self.last_checker_signal = None

1089

681

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

1090

682

vars(self))

1091

683

return False

1092

684

1093

685

def checked_ok(self):

1094

686

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

1095

687

self.last_checked_ok = datetime.datetime.utcnow()

1096

688

self.last_checker_status = 0

1097

689

self.last_checker_signal = None

1098

690

self.bump_timeout()

1099

691

1100

692

def bump_timeout(self, timeout=None):

1101

693

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

1102

694

if timeout is None:

1103

695

timeout = self.timeout

1104

696

if self.disable_initiator_tag is not None:

1105

GLib.source_remove(self.disable_initiator_tag)

697

gobject.source_remove(self.disable_initiator_tag)

1106

698

self.disable_initiator_tag = None

1107

699

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

1108

self.disable_initiator_tag = GLib.timeout_add(

700

self.disable_initiator_tag = gobject.timeout_add(

1109

701

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

1110

702

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

1111

703

1112

704

def need_approval(self):

1113

705

self.last_approval_request = datetime.datetime.utcnow()

1114

706

1115

707

def start_checker(self):

1116

708

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

1117

709

1118

710

If a checker already exists, leave it running and do

1119

711

nothing."""

1120

712

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

1125

717

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

1126

718

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

1127

719

# should be.

1128

720

1129

721

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

1130

722

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

1131

723

self.checker.join()

1134

726

if self.checker is None:

1135

727

# Escape attributes for the shell

1136

728

escaped_attrs = {

1137

attr: shlex.quote(str(getattr(self, attr)))

1138

for attr in self.runtime_expansions}

729

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

730

for attr in self.runtime_expansions }

1139

731

try:

1140

732

command = self.checker_command % escaped_attrs

1141

733

except TypeError as error:

1153

745

# The exception is when not debugging but nevertheless

1154

746

# running in the foreground; use the previously

1155

747

# created wnull.

1156

popen_args = {"close_fds": True,

1157

"shell": True,

1158

"cwd": "/"}

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

1159

751

if (not self.server_settings["debug"]

1160

752

and self.server_settings["foreground"]):

1161

753

popen_args.update({"stdout": wnull,

1162

"stderr": wnull})

1163

pipe = multiprocessing.Pipe(duplex=False)

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

1164

756

self.checker = multiprocessing.Process(

1165

target=call_pipe,

1166

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

1167

kwargs=popen_args)

757

target = call_pipe,

758

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

759

kwargs = popen_args)

1168

760

self.checker.start()

1169

self.checker_callback_tag = GLib.io_add_watch(

1170

GLib.IOChannel.unix_new(pipe[0].fileno()),

1171

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

1172

763

self.checker_callback, pipe[0], command)

1173

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

764

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

1174

765

return True

1175

766

1176

767

def stop_checker(self):

1177

768

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

1178

769

if self.checker_callback_tag:

1179

GLib.source_remove(self.checker_callback_tag)

770

gobject.source_remove(self.checker_callback_tag)

1180

771

self.checker_callback_tag = None

1181

772

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

1182

773

return

1191

782

byte_arrays=False):

1192

783

"""Decorators for marking methods of a DBusObjectWithProperties to

1193

784

become properties on the D-Bus.

1194

785

1195

786

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

1196

787

and with one argument by "Set".

1197

788

1198

789

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

1199

790

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

1200

791

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

1204

795

if byte_arrays and signature != "ay":

1205

796

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

1206

797

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

1207

798

1208

799

def decorator(func):

1209

800

func._dbus_is_property = True

1210

801

func._dbus_interface = dbus_interface

1213

804

func._dbus_name = func.__name__

1214

805

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

1215

806

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

1216

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1217

808

return func

1218

809

1219

810

return decorator

1220

811

1221

812

1222

813

def dbus_interface_annotations(dbus_interface):

1223

814

"""Decorator for marking functions returning interface annotations

1224

815

1225

816

Usage:

1226

817

1227

818

@dbus_interface_annotations("org.example.Interface")

1228

819

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

1229

820

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

1230

821

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

1231

822

"false"}

1232

823

"""

1233

824

1234

825

def decorator(func):

1235

826

func._dbus_is_interface = True

1236

827

func._dbus_interface = dbus_interface

1237

828

func._dbus_name = dbus_interface

1238

829

return func

1239

830

1240

831

return decorator

1241

832

1242

833

1243

834

def dbus_annotations(annotations):

1244

835

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

1245

836

Usage:

1246

837

1247

838

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

1248

839

"org.freedesktop.DBus.Property."

1249

840

"EmitsChangedSignal": "false"})

1251

842

access="r")

1252

843

def Property_dbus_property(self):

1253

844

return dbus.Boolean(False)

1254

1255

See also the DBusObjectWithAnnotations class.

1256

845

"""

1257

846

1258

847

def decorator(func):

1259

848

func._dbus_annotations = annotations

1260

849

return func

1261

850

1262

851

return decorator

1263

852

1264

853

1280

869

pass

1281

870

1282

871

1283

class DBusObjectWithAnnotations(dbus.service.Object):

1284

"""A D-Bus object with annotations.

1285

1286

Classes inheriting from this can use the dbus_annotations

1287

decorator to add annotations to methods or signals.

872

class DBusObjectWithProperties(dbus.service.Object):

873

"""A D-Bus object with properties.

874

875

Classes inheriting from this can use the dbus_service_property

876

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

877

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

1288

878

"""

1289

879

1290

880

@staticmethod

1291

881

def _is_dbus_thing(thing):

1292

882

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

1293

883

1294

884

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

1295

885

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

1296

886

"""

1297

887

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

1298

888

False)

1299

889

1300

890

def _get_all_dbus_things(self, thing):

1301

891

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

1302

892

"""

1305

895

for cls in self.__class__.__mro__

1306

896

for name, athing in

1307

897

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

1308

1309

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1310

out_signature="s",

1311

path_keyword='object_path',

1312

connection_keyword='connection')

1313

def Introspect(self, object_path, connection):

1314

"""Overloading of standard D-Bus method.

1315

1316

Inserts annotation tags on methods and signals.

1317

"""

1318

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

1319

connection)

1320

try:

1321

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

1322

1323

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

1324

# Add annotation tags

1325

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

1326

for tag in if_tag.getElementsByTagName(typ):

1327

annots = dict()

1328

for name, prop in (self.

1329

_get_all_dbus_things(typ)):

1330

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

1331

and prop._dbus_interface

1332

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

1333

annots.update(getattr(

1334

prop, "_dbus_annotations", {}))

1335

for name, value in annots.items():

1336

ann_tag = document.createElement(

1337

"annotation")

1338

ann_tag.setAttribute("name", name)

1339

ann_tag.setAttribute("value", value)

1340

tag.appendChild(ann_tag)

1341

# Add interface annotation tags

1342

for annotation, value in dict(

1343

itertools.chain.from_iterable(

1344

annotations().items()

1345

for name, annotations

1346

in self._get_all_dbus_things("interface")

1347

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

1348

)).items():

1349

ann_tag = document.createElement("annotation")

1350

ann_tag.setAttribute("name", annotation)

1351

ann_tag.setAttribute("value", value)

1352

if_tag.appendChild(ann_tag)

1353

# Fix argument name for the Introspect method itself

1354

if (if_tag.getAttribute("name")

1355

== dbus.INTROSPECTABLE_IFACE):

1356

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

1357

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

1358

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

1359

if (arg.getAttribute("direction")

1360

== "out"):

1361

arg.setAttribute("name",

1362

"xml_data")

1363

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

1364

document.unlink()

1365

except (AttributeError, xml.dom.DOMException,

1366

xml.parsers.expat.ExpatError) as error:

1367

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

1368

exc_info=error)

1369

return xmlstring

1370

1371

1372

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1373

"""A D-Bus object with properties.

1374

1375

Classes inheriting from this can use the dbus_service_property

1376

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

1377

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

1378

"""

1379

898

1380

899

def _get_dbus_property(self, interface_name, property_name):

1381

900

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

1382

901

property with the specified name and interface.

1387

906

if (value._dbus_name == property_name

1388

907

and value._dbus_interface == interface_name):

1389

908

return value.__get__(self)

1390

909

1391

910

# No such property

1392

911

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

1393

912

self.dbus_object_path, interface_name, property_name))

1394

1395

@classmethod

1396

def _get_all_interface_names(cls):

1397

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

1398

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

1399

"_dbus_interface", None)

1400

for x in (inspect.getmro(cls))

1401

for attr in dir(x))

1402

if name is not None)

1403

913

1404

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

1405

915

in_signature="ss",

1406

916

out_signature="v")

1414

924

if not hasattr(value, "variant_level"):

1415

925

return value

1416

926

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

1417

927

1418

928

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

1419

929

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

1420

930

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

1429

939

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

1430

940

"'ay' signature {!r}"

1431

941

.format(prop._dbus_signature))

1432

value = dbus.ByteArray(bytes(value))

942

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

943

for byte in value))

1433

944

prop(value)

1434

945

1435

946

@dbus.service.method(dbus.PROPERTIES_IFACE,

1436

947

in_signature="s",

1437

948

out_signature="a{sv}")

1438

949

def GetAll(self, interface_name):

1439

950

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

1440

951

standard.

1441

952

1442

953

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

1443

954

"""

1444

955

properties = {}

1455

966

properties[name] = value

1456

967

continue

1457

968

properties[name] = type(value)(

1458

value, variant_level=value.variant_level + 1)

969

value, variant_level = value.variant_level + 1)

1459

970

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

1460

971

1461

972

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

1462

973

def PropertiesChanged(self, interface_name, changed_properties,

1463

974

invalidated_properties):

1465

976

standard.

1466

977

"""

1467

978

pass

1468

979

1469

980

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1470

981

out_signature="s",

1471

982

path_keyword='object_path',

1472

983

connection_keyword='connection')

1473

984

def Introspect(self, object_path, connection):

1474

985

"""Overloading of standard D-Bus method.

1475

986

1476

987

Inserts property tags and interface annotation tags.

1477

988

"""

1478

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1479

object_path,

1480

connection)

989

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

990

connection)

1481

991

try:

1482

992

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

1483

993

1484

994

def make_tag(document, name, prop):

1485

995

e = document.createElement("property")

1486

996

e.setAttribute("name", name)

1487

997

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

1488

998

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

1489

999

return e

1490

1000

1491

1001

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

1492

1002

# Add property tags

1493

1003

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

1496

1006

if prop._dbus_interface

1497

1007

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

1498

1008

if_tag.appendChild(tag)

1499

# Add annotation tags for properties

1500

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

1501

annots = dict()

1502

for name, prop in self._get_all_dbus_things(

1503

"property"):

1504

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

1505

and prop._dbus_interface

1506

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

1507

annots.update(getattr(

1508

prop, "_dbus_annotations", {}))

1509

for name, value in annots.items():

1510

ann_tag = document.createElement(

1511

"annotation")

1512

ann_tag.setAttribute("name", name)

1513

ann_tag.setAttribute("value", value)

1514

tag.appendChild(ann_tag)

1009

# Add annotation tags

1010

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

1011

for tag in if_tag.getElementsByTagName(typ):

1012

annots = dict()

1013

for name, prop in (self.

1014

_get_all_dbus_things(typ)):

1015

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

1016

and prop._dbus_interface

1017

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

1018

annots.update(getattr(

1019

prop, "_dbus_annotations", {}))

1020

for name, value in annots.items():

1021

ann_tag = document.createElement(

1022

"annotation")

1023

ann_tag.setAttribute("name", name)

1024

ann_tag.setAttribute("value", value)

1025

tag.appendChild(ann_tag)

1026

# Add interface annotation tags

1027

for annotation, value in dict(

1028

itertools.chain.from_iterable(

1029

annotations().items()

1030

for name, annotations

1031

in self._get_all_dbus_things("interface")

1032

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

1033

)).items():

1034

ann_tag = document.createElement("annotation")

1035

ann_tag.setAttribute("name", annotation)

1036

ann_tag.setAttribute("value", value)

1037

if_tag.appendChild(ann_tag)

1515

1038

# Add the names to the return values for the

1516

1039

# "org.freedesktop.DBus.Properties" methods

1517

1040

if (if_tag.getAttribute("name")

1536

1059

return xmlstring

1537

1060

1538

1061

1539

try:

1540

dbus.OBJECT_MANAGER_IFACE

1541

except AttributeError:

1542

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

1543

1544

1545

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1546

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

1547

1548

Classes inheriting from this exposes the standard

1549

GetManagedObjects call and the InterfacesAdded and

1550

InterfacesRemoved signals on the standard

1551

"org.freedesktop.DBus.ObjectManager" interface.

1552

1553

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

1554

manually.

1555

"""

1556

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1557

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

1558

def GetManagedObjects(self):

1559

"""This function must be overridden"""

1560

raise NotImplementedError()

1561

1562

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1563

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

1564

def InterfacesAdded(self, object_path, interfaces_and_properties):

1565

pass

1566

1567

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

1568

def InterfacesRemoved(self, object_path, interfaces):

1569

pass

1570

1571

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1572

out_signature="s",

1573

path_keyword='object_path',

1574

connection_keyword='connection')

1575

def Introspect(self, object_path, connection):

1576

"""Overloading of standard D-Bus method.

1577

1578

Override return argument name of GetManagedObjects to be

1579

"objpath_interfaces_and_properties"

1580

"""

1581

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1582

object_path,

1583

connection)

1584

try:

1585

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

1586

1587

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

1588

# Fix argument name for the GetManagedObjects method

1589

if (if_tag.getAttribute("name")

1590

== dbus.OBJECT_MANAGER_IFACE):

1591

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

1592

if (cn.getAttribute("name")

1593

== "GetManagedObjects"):

1594

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

1595

if (arg.getAttribute("direction")

1596

== "out"):

1597

arg.setAttribute(

1598

"name",

1599

"objpath_interfaces"

1600

"_and_properties")

1601

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

1602

document.unlink()

1603

except (AttributeError, xml.dom.DOMException,

1604

xml.parsers.expat.ExpatError) as error:

1605

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

1606

exc_info=error)

1607

return xmlstring

1608

1609

1610

1062

def datetime_to_dbus(dt, variant_level=0):

1611

1063

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

1612

1064

if dt is None:

1613

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

1065

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

1614

1066

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

1615

1067

1616

1068

1619

1071

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

1620

1072

interface names according to the "alt_interface_names" mapping.

1621

1073

Usage:

1622

1074

1623

1075

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

1624

1076

"net.example.AlternateInterface"})

1625

1077

class SampleDBusObject(dbus.service.Object):

1626

1078

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

1627

1079

def SampleDBusMethod():

1628

1080

pass

1629

1081

1630

1082

The above "SampleDBusMethod" on "SampleDBusObject" will be

1631

1083

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

1632

1084

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

1633

1085

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

1634

1086

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

1635

1087

1636

1088

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

1637

1089

(from DBusObjectWithProperties) and interfaces (from the

1638

1090

dbus_interface_annotations decorator).

1639

1091

"""

1640

1092

1641

1093

def wrapper(cls):

1642

1094

for orig_interface_name, alt_interface_name in (

1643

1095

alt_interface_names.items()):

1658

1110

interface_names.add(alt_interface)

1659

1111

# Is this a D-Bus signal?

1660

1112

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

1661

# Extract the original non-method undecorated

1662

# function by black magic

1663

1113

if sys.version_info.major == 2:

1114

# Extract the original non-method undecorated

1115

# function by black magic

1664

1116

nonmethod_func = (dict(

1665

1117

zip(attribute.func_code.co_freevars,

1666

1118

attribute.__closure__))

1667

1119

["func"].cell_contents)

1668

1120

else:

1669

nonmethod_func = (dict(

1670

zip(attribute.__code__.co_freevars,

1671

attribute.__closure__))

1672

["func"].cell_contents)

1121

nonmethod_func = attribute

1673

1122

# Create a new, but exactly alike, function

1674

1123

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

1675

1124

# with the alternate D-Bus interface name

1676

new_function = copy_function(nonmethod_func)

1125

if sys.version_info.major == 2:

1126

new_function = types.FunctionType(

1127

nonmethod_func.func_code,

1128

nonmethod_func.func_globals,

1129

nonmethod_func.func_name,

1130

nonmethod_func.func_defaults,

1131

nonmethod_func.func_closure)

1132

else:

1133

new_function = types.FunctionType(

1134

nonmethod_func.__code__,

1135

nonmethod_func.__globals__,

1136

nonmethod_func.__name__,

1137

nonmethod_func.__defaults__,

1138

nonmethod_func.__closure__)

1677

1139

new_function = (dbus.service.signal(

1678

1140

alt_interface,

1679

1141

attribute._dbus_signature)(new_function))

1683

1145

attribute._dbus_annotations)

1684

1146

except AttributeError:

1685

1147

pass

1686

1687

1148

# Define a creator of a function to call both the

1688

1149

# original and alternate functions, so both the

1689

1150

# original and alternate signals gets sent when

1692

1153

"""This function is a scope container to pass

1693

1154

func1 and func2 to the "call_both" function

1694

1155

outside of its arguments"""

1695

1696

@functools.wraps(func2)

1156

1697

1157

def call_both(*args, **kwargs):

1698

1158

"""This function will emit two D-Bus

1699

1159

signals by calling func1 and func2"""

1700

1160

func1(*args, **kwargs)

1701

1161

func2(*args, **kwargs)

1702

# Make wrapper function look like a D-Bus

1703

# signal

1704

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

1705

if name.startswith("_dbus_"):

1706

setattr(call_both, name, attr)

1707

1162

1708

1163

return call_both

1709

1164

# Create the "call_both" function and add it to

1710

1165

# the class

1720

1175

alt_interface,

1721

1176

attribute._dbus_in_signature,

1722

1177

attribute._dbus_out_signature)

1723

(copy_function(attribute)))

1178

(types.FunctionType(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1724

1183

# Copy annotations, if any

1725

1184

try:

1726

1185

attr[attrname]._dbus_annotations = dict(

1738

1197

attribute._dbus_access,

1739

1198

attribute._dbus_get_args_options

1740

1199

["byte_arrays"])

1741

(copy_function(attribute)))

1200

(types.FunctionType(

1201

attribute.func_code,

1202

attribute.func_globals,

1203

attribute.func_name,

1204

attribute.func_defaults,

1205

attribute.func_closure)))

1742

1206

# Copy annotations, if any

1743

1207

try:

1744

1208

attr[attrname]._dbus_annotations = dict(

1753

1217

# to the class.

1754

1218

attr[attrname] = (

1755

1219

dbus_interface_annotations(alt_interface)

1756

(copy_function(attribute)))

1220

(types.FunctionType(attribute.func_code,

1221

attribute.func_globals,

1222

attribute.func_name,

1223

attribute.func_defaults,

1224

attribute.func_closure)))

1757

1225

if deprecate:

1758

1226

# Deprecate all alternate interfaces

1759

iname = "_AlternateDBusNames_interface_annotation{}"

1227

iname="_AlternateDBusNames_interface_annotation{}"

1760

1228

for interface_name in interface_names:

1761

1229

1762

1230

@dbus_interface_annotations(interface_name)

1763

1231

def func(self):

1764

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

1765

"true"}

1232

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

1233

"true" }

1766

1234

# Find an unused name

1767

1235

for aname in (iname.format(i)

1768

1236

for i in itertools.count()):

1772

1240

if interface_names:

1773

1241

# Replace the class with a new subclass of it with

1774

1242

# methods, signals, etc. as created above.

1775

if sys.version_info.major == 2:

1776

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

1777

(cls, ), attr)

1778

else:

1779

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

1780

(cls, ), attr)

1243

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

1244

(cls, ), attr)

1781

1245

return cls

1782

1246

1783

1247

return wrapper

1784

1248

1785

1249

1787

1251

"se.bsnet.fukt.Mandos"})

1788

1252

class ClientDBus(Client, DBusObjectWithProperties):

1789

1253

"""A Client class using D-Bus

1790

1254

1791

1255

Attributes:

1792

1256

dbus_object_path: dbus.ObjectPath

1793

1257

bus: dbus.SystemBus()

1794

1258

"""

1795

1259

1796

1260

runtime_expansions = (Client.runtime_expansions

1797

1261

+ ("dbus_object_path", ))

1798

1262

1799

1263

_interface = "se.recompile.Mandos.Client"

1800

1264

1801

1265

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

1802

1803

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

1266

1267

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

1804

1268

self.bus = bus

1805

1269

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

1806

1270

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

1812

1276

"/clients/" + client_object_name)

1813

1277

DBusObjectWithProperties.__init__(self, self.bus,

1814

1278

self.dbus_object_path)

1815

1279

1816

1280

def notifychangeproperty(transform_func, dbus_name,

1817

1281

type_func=lambda x: x,

1818

1282

variant_level=1,

1820

1284

_interface=_interface):

1821

1285

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

1822

1286

its changes to DBus.

1823

1287

1824

1288

transform_fun: Function that takes a value and a variant_level

1825

1289

and transforms it to a D-Bus type.

1826

1290

dbus_name: D-Bus name of the variable

1829

1293

variant_level: D-Bus variant level. Default: 1

1830

1294

"""

1831

1295

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

1832

1296

1833

1297

def setter(self, value):

1834

1298

if hasattr(self, "dbus_object_path"):

1835

1299

if (not hasattr(self, attrname) or

1842

1306

else:

1843

1307

dbus_value = transform_func(

1844

1308

type_func(value),

1845

variant_level=variant_level)

1309

variant_level = variant_level)

1846

1310

self.PropertyChanged(dbus.String(dbus_name),

1847

1311

dbus_value)

1848

1312

self.PropertiesChanged(

1849

1313

_interface,

1850

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

1851

dbus_value}),

1314

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

1315

dbus_value }),

1852

1316

dbus.Array())

1853

1317

setattr(self, attrname, value)

1854

1318

1855

1319

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

1856

1320

1857

1321

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1858

1322

approvals_pending = notifychangeproperty(dbus.Boolean,

1859

1323

"ApprovalPending",

1860

type_func=bool)

1324

type_func = bool)

1861

1325

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

1862

1326

last_enabled = notifychangeproperty(datetime_to_dbus,

1863

1327

"LastEnabled")

1864

1328

checker = notifychangeproperty(

1865

1329

dbus.Boolean, "CheckerRunning",

1866

type_func=lambda checker: checker is not None)

1330

type_func = lambda checker: checker is not None)

1867

1331

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1868

1332

"LastCheckedOK")

1869

1333

last_checker_status = notifychangeproperty(dbus.Int16,

1874

1338

"ApprovedByDefault")

1875

1339

approval_delay = notifychangeproperty(

1876

1340

dbus.UInt64, "ApprovalDelay",

1877

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

1341

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

1878

1342

approval_duration = notifychangeproperty(

1879

1343

dbus.UInt64, "ApprovalDuration",

1880

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

1344

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

1881

1345

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

1882

1346

timeout = notifychangeproperty(

1883

1347

dbus.UInt64, "Timeout",

1884

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

1348

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

1885

1349

extended_timeout = notifychangeproperty(

1886

1350

dbus.UInt64, "ExtendedTimeout",

1887

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

1351

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

1888

1352

interval = notifychangeproperty(

1889

1353

dbus.UInt64, "Interval",

1890

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

1354

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

1891

1355

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

1892

1356

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

1893

1357

invalidate_only=True)

1894

1358

1895

1359

del notifychangeproperty

1896

1360

1897

1361

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

1898

1362

try:

1899

1363

self.remove_from_connection()

1902

1366

if hasattr(DBusObjectWithProperties, "__del__"):

1903

1367

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

1904

1368

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

1905

1369

1906

1370

def checker_callback(self, source, condition,

1907

1371

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

1908

1372

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

1912

1376

if exitstatus >= 0:

1913

1377

# Emit D-Bus signal

1914

1378

self.CheckerCompleted(dbus.Int16(exitstatus),

1915

# This is specific to GNU libC

1916

dbus.Int64(exitstatus << 8),

1379

dbus.Int64(0),

1917

1380

dbus.String(command))

1918

1381

else:

1919

1382

# Emit D-Bus signal

1920

1383

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

1921

1384

dbus.Int64(

1922

# This is specific to GNU libC

1923

(exitstatus << 8)

1924

| self.last_checker_signal),

1385

self.last_checker_signal),

1925

1386

dbus.String(command))

1926

1387

return ret

1927

1388

1928

1389

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

1929

1390

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

1930

1391

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

1934

1395

# Emit D-Bus signal

1935

1396

self.CheckerStarted(self.current_checker_command)

1936

1397

return r

1937

1398

1938

1399

def _reset_approved(self):

1939

1400

self.approved = None

1940

1401

return False

1941

1402

1942

1403

def approve(self, value=True):

1943

1404

self.approved = value

1944

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

1945

* 1000), self._reset_approved)

1405

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

1406

* 1000), self._reset_approved)

1946

1407

self.send_changedstate()

1947

1948

# D-Bus methods, signals & properties

1949

1950

# Interfaces

1951

1952

# Signals

1953

1408

1409

## D-Bus methods, signals & properties

1410

1411

## Interfaces

1412

1413

## Signals

1414

1954

1415

# CheckerCompleted - signal

1955

1416

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

1956

1417

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

1957

1418

"D-Bus signal"

1958

1419

pass

1959

1420

1960

1421

# CheckerStarted - signal

1961

1422

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

1962

1423

def CheckerStarted(self, command):

1963

1424

"D-Bus signal"

1964

1425

pass

1965

1426

1966

1427

# PropertyChanged - signal

1967

1428

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

1968

1429

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

1969

1430

def PropertyChanged(self, property, value):

1970

1431

"D-Bus signal"

1971

1432

pass

1972

1433

1973

1434

# GotSecret - signal

1974

1435

@dbus.service.signal(_interface)

1975

1436

def GotSecret(self):

1978

1439

server to mandos-client

1979

1440

"""

1980

1441

pass

1981

1442

1982

1443

# Rejected - signal

1983

1444

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

1984

1445

def Rejected(self, reason):

1985

1446

"D-Bus signal"

1986

1447

pass

1987

1448

1988

1449

# NeedApproval - signal

1989

1450

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

1990

1451

def NeedApproval(self, timeout, default):

1991

1452

"D-Bus signal"

1992

1453

return self.need_approval()

1993

1994

# Methods

1995

1454

1455

## Methods

1456

1996

1457

# Approve - method

1997

1458

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

1998

1459

def Approve(self, value):

1999

1460

self.approve(value)

2000

1461

2001

1462

# CheckedOK - method

2002

1463

@dbus.service.method(_interface)

2003

1464

def CheckedOK(self):

2004

1465

self.checked_ok()

2005

1466

2006

1467

# Enable - method

2007

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

2008

1468

@dbus.service.method(_interface)

2009

1469

def Enable(self):

2010

1470

"D-Bus method"

2011

1471

self.enable()

2012

1472

2013

1473

# StartChecker - method

2014

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

2015

1474

@dbus.service.method(_interface)

2016

1475

def StartChecker(self):

2017

1476

"D-Bus method"

2018

1477

self.start_checker()

2019

1478

2020

1479

# Disable - method

2021

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

2022

1480

@dbus.service.method(_interface)

2023

1481

def Disable(self):

2024

1482

"D-Bus method"

2025

1483

self.disable()

2026

1484

2027

1485

# StopChecker - method

2028

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

2029

1486

@dbus.service.method(_interface)

2030

1487

def StopChecker(self):

2031

1488

self.stop_checker()

2032

2033

# Properties

2034

1489

1490

## Properties

1491

2035

1492

# ApprovalPending - property

2036

1493

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

2037

1494

def ApprovalPending_dbus_property(self):

2038

1495

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

2039

1496

2040

1497

# ApprovedByDefault - property

2041

1498

@dbus_service_property(_interface,

2042

1499

signature="b",

2045

1502

if value is None: # get

2046

1503

return dbus.Boolean(self.approved_by_default)

2047

1504

self.approved_by_default = bool(value)

2048

1505

2049

1506

# ApprovalDelay - property

2050

1507

@dbus_service_property(_interface,

2051

1508

signature="t",

2055

1512

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

2056

1513

* 1000)

2057

1514

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

2058

1515

2059

1516

# ApprovalDuration - property

2060

1517

@dbus_service_property(_interface,

2061

1518

signature="t",

2065

1522

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

2066

1523

* 1000)

2067

1524

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

2068

1525

2069

1526

# Name - property

2070

@dbus_annotations(

2071

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

2072

1527

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

2073

1528

def Name_dbus_property(self):

2074

1529

return dbus.String(self.name)

2075

2076

# KeyID - property

2077

@dbus_annotations(

2078

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

2079

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

2080

def KeyID_dbus_property(self):

2081

return dbus.String(self.key_id)

2082

1530

2083

1531

# Fingerprint - property

2084

@dbus_annotations(

2085

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

2086

1532

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

2087

1533

def Fingerprint_dbus_property(self):

2088

1534

return dbus.String(self.fingerprint)

2089

1535

2090

1536

# Host - property

2091

1537

@dbus_service_property(_interface,

2092

1538

signature="s",

2095

1541

if value is None: # get

2096

1542

return dbus.String(self.host)

2097

1543

self.host = str(value)

2098

1544

2099

1545

# Created - property

2100

@dbus_annotations(

2101

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

2102

1546

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

2103

1547

def Created_dbus_property(self):

2104

1548

return datetime_to_dbus(self.created)

2105

1549

2106

1550

# LastEnabled - property

2107

1551

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

2108

1552

def LastEnabled_dbus_property(self):

2109

1553

return datetime_to_dbus(self.last_enabled)

2110

1554

2111

1555

# Enabled - property

2112

1556

@dbus_service_property(_interface,

2113

1557

signature="b",

2119

1563

self.enable()

2120

1564

else:

2121

1565

self.disable()

2122

1566

2123

1567

# LastCheckedOK - property

2124

1568

@dbus_service_property(_interface,

2125

1569

signature="s",

2129

1573

self.checked_ok()

2130

1574

return

2131

1575

return datetime_to_dbus(self.last_checked_ok)

2132

1576

2133

1577

# LastCheckerStatus - property

2134

1578

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

2135

1579

def LastCheckerStatus_dbus_property(self):

2136

1580

return dbus.Int16(self.last_checker_status)

2137

1581

2138

1582

# Expires - property

2139

1583

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

2140

1584

def Expires_dbus_property(self):

2141

1585

return datetime_to_dbus(self.expires)

2142

1586

2143

1587

# LastApprovalRequest - property

2144

1588

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

2145

1589

def LastApprovalRequest_dbus_property(self):

2146

1590

return datetime_to_dbus(self.last_approval_request)

2147

1591

2148

1592

# Timeout - property

2149

1593

@dbus_service_property(_interface,

2150

1594

signature="t",

2165

1609

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

2166

1610

is None):

2167

1611

return

2168

GLib.source_remove(self.disable_initiator_tag)

2169

self.disable_initiator_tag = GLib.timeout_add(

1612

gobject.source_remove(self.disable_initiator_tag)

1613

self.disable_initiator_tag = gobject.timeout_add(

2170

1614

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

2171

1615

self.disable)

2172

1616

2173

1617

# ExtendedTimeout - property

2174

1618

@dbus_service_property(_interface,

2175

1619

signature="t",

2179

1623

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

2180

1624

* 1000)

2181

1625

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

2182

1626

2183

1627

# Interval - property

2184

1628

@dbus_service_property(_interface,

2185

1629

signature="t",

2192

1636

return

2193

1637

if self.enabled:

2194

1638

# Reschedule checker run

2195

GLib.source_remove(self.checker_initiator_tag)

2196

self.checker_initiator_tag = GLib.timeout_add(

1639

gobject.source_remove(self.checker_initiator_tag)

1640

self.checker_initiator_tag = gobject.timeout_add(

2197

1641

value, self.start_checker)

2198

self.start_checker() # Start one now, too

2199

1642

self.start_checker() # Start one now, too

1643

2200

1644

# Checker - property

2201

1645

@dbus_service_property(_interface,

2202

1646

signature="s",

2205

1649

if value is None: # get

2206

1650

return dbus.String(self.checker_command)

2207

1651

self.checker_command = str(value)

2208

1652

2209

1653

# CheckerRunning - property

2210

1654

@dbus_service_property(_interface,

2211

1655

signature="b",

2217

1661

self.start_checker()

2218

1662

else:

2219

1663

self.stop_checker()

2220

1664

2221

1665

# ObjectPath - property

2222

@dbus_annotations(

2223

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

2224

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

2225

1666

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

2226

1667

def ObjectPath_dbus_property(self):

2227

return self.dbus_object_path # is already a dbus.ObjectPath

2228

1668

return self.dbus_object_path # is already a dbus.ObjectPath

1669

2229

1670

# Secret = property

2230

@dbus_annotations(

2231

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

2232

"invalidates"})

2233

1671

@dbus_service_property(_interface,

2234

1672

signature="ay",

2235

1673

access="write",

2236

1674

byte_arrays=True)

2237

1675

def Secret_dbus_property(self, value):

2238

1676

self.secret = bytes(value)

2239

1677

2240

1678

del _interface

2241

1679

2242

1680

2243

class ProxyClient:

2244

def __init__(self, child_pipe, key_id, fpr, address):

1681

class ProxyClient(object):

1682

def __init__(self, child_pipe, fpr, address):

2245

1683

self._pipe = child_pipe

2246

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

1684

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

2247

1685

if not self._pipe.recv():

2248

raise KeyError(key_id or fpr)

2249

1686

raise KeyError(fpr)

1687

2250

1688

def __getattribute__(self, name):

2251

1689

if name == '_pipe':

2252

1690

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

2255

1693

if data[0] == 'data':

2256

1694

return data[1]

2257

1695

if data[0] == 'function':

2258

1696

2259

1697

def func(*args, **kwargs):

2260

1698

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

2261

1699

return self._pipe.recv()[1]

2262

1700

2263

1701

return func

2264

1702

2265

1703

def __setattr__(self, name, value):

2266

1704

if name == '_pipe':

2267

1705

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

2270

1708

2271

1709

class ClientHandler(socketserver.BaseRequestHandler, object):

2272

1710

"""A class to handle client connections.

2273

1711

2274

1712

Instantiated once for each connection to handle it.

2275

1713

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

2276

1714

2277

1715

def handle(self):

2278

1716

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

2279

1717

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

2280

1718

str(self.client_address))

2281

1719

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

2282

1720

self.server.child_pipe.fileno())

2283

2284

session = gnutls.ClientSession(self.request)

2285

2286

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

2287

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

2288

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

2289

# "+DHE-DSS"))

1721

1722

session = gnutls.connection.ClientSession(

1723

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

1724

1725

# Note: gnutls.connection.X509Credentials is really a

1726

# generic GnuTLS certificate credentials object so long as

1727

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

1728

# here despite using OpenPGP certificates.

1729

1730

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

1731

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

1732

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

1733

# "+DHE-DSS"))

2290

1734

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

2291

1735

priority = self.server.gnutls_priority

2292

1736

if priority is None:

2293

1737

priority = "NORMAL"

2294

gnutls.priority_set_direct(session._c_object,

2295

priority.encode("utf-8"),

2296

None)

2297

1738

gnutls.library.functions.gnutls_priority_set_direct(

1739

session._c_object, priority, None)

1740

2298

1741

# Start communication using the Mandos protocol

2299

1742

# Get protocol number

2300

1743

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

2305

1748

except (ValueError, IndexError, RuntimeError) as error:

2306

1749

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

2307

1750

return

2308

1751

2309

1752

# Start GnuTLS connection

2310

1753

try:

2311

1754

session.handshake()

2312

except gnutls.Error as error:

1755

except gnutls.errors.GNUTLSError as error:

2313

1756

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

2314

1757

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

2315

1758

# established. Just abandon the request.

2316

1759

return

2317

1760

logger.debug("Handshake succeeded")

2318

1761

2319

1762

approval_required = False

2320

1763

try:

2321

if gnutls.has_rawpk:

2322

fpr = b""

2323

try:

2324

key_id = self.key_id(

2325

self.peer_certificate(session))

2326

except (TypeError, gnutls.Error) as error:

2327

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

2328

return

2329

logger.debug("Key ID: %s", key_id)

2330

2331

else:

2332

key_id = b""

2333

try:

2334

fpr = self.fingerprint(

2335

self.peer_certificate(session))

2336

except (TypeError, gnutls.Error) as error:

2337

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

2338

return

2339

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

2340

2341

try:

2342

client = ProxyClient(child_pipe, key_id, fpr,

1764

try:

1765

fpr = self.fingerprint(

1766

self.peer_certificate(session))

1767

except (TypeError,

1768

gnutls.errors.GNUTLSError) as error:

1769

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

1770

return

1771

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

1772

1773

try:

1774

client = ProxyClient(child_pipe, fpr,

2343

1775

self.client_address)

2344

1776

except KeyError:

2345

1777

return

2346

1778

2347

1779

if client.approval_delay:

2348

1780

delay = client.approval_delay

2349

1781

client.approvals_pending += 1

2350

1782

approval_required = True

2351

1783

2352

1784

while True:

2353

1785

if not client.enabled:

2354

1786

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

2357

1789

# Emit D-Bus signal

2358

1790

client.Rejected("Disabled")

2359

1791

return

2360

1792

2361

1793

if client.approved or not client.approval_delay:

2362

# We are approved or approval is disabled

1794

#We are approved or approval is disabled

2363

1795

break

2364

1796

elif client.approved is None:

2365

1797

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

2376

1808

# Emit D-Bus signal

2377

1809

client.Rejected("Denied")

2378

1810

return

2379

2380

# wait until timeout or approved

1811

1812

#wait until timeout or approved

2381

1813

time = datetime.datetime.now()

2382

1814

client.changedstate.acquire()

2383

1815

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

2396

1828

break

2397

1829

else:

2398

1830

delay -= time2 - time

2399

2400

try:

2401

session.send(client.secret)

2402

except gnutls.Error as error:

2403

logger.warning("gnutls send failed",

2404

exc_info=error)

2405

return

2406

1831

1832

sent_size = 0

1833

while sent_size < len(client.secret):

1834

try:

1835

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

1836

except gnutls.errors.GNUTLSError as error:

1837

logger.warning("gnutls send failed",

1838

exc_info=error)

1839

return

1840

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

1841

len(client.secret) - (sent_size

1842

+ sent))

1843

sent_size += sent

1844

2407

1845

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

2408

1846

# bump the timeout using extended_timeout

2409

1847

client.bump_timeout(client.extended_timeout)

2410

1848

if self.server.use_dbus:

2411

1849

# Emit D-Bus signal

2412

1850

client.GotSecret()

2413

1851

2414

1852

finally:

2415

1853

if approval_required:

2416

1854

client.approvals_pending -= 1

2417

1855

try:

2418

1856

session.bye()

2419

except gnutls.Error as error:

1857

except gnutls.errors.GNUTLSError as error:

2420

1858

logger.warning("GnuTLS bye failed",

2421

1859

exc_info=error)

2422

1860

2423

1861

@staticmethod

2424

1862

def peer_certificate(session):

2425

"Return the peer's certificate as a bytestring"

2426

try:

2427

cert_type = gnutls.certificate_type_get2(session._c_object,

2428

gnutls.CTYPE_PEERS)

2429

except AttributeError:

2430

cert_type = gnutls.certificate_type_get(session._c_object)

2431

if gnutls.has_rawpk:

2432

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2433

else:

2434

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2435

# If not a valid certificate type...

2436

if cert_type not in valid_cert_types:

2437

logger.info("Cert type %r not in %r", cert_type,

2438

valid_cert_types)

2439

# ...return invalid data

2440

return b""

1863

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

1864

# If not an OpenPGP certificate...

1865

if (gnutls.library.functions.gnutls_certificate_type_get(

1866

session._c_object)

1867

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1868

# ...do the normal thing

1869

return session.peer_certificate

2441

1870

list_size = ctypes.c_uint(1)

2442

cert_list = (gnutls.certificate_get_peers

1871

cert_list = (gnutls.library.functions

1872

.gnutls_certificate_get_peers

2443

1873

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

2444

1874

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

2445

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

1875

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

1876

" certificate")

2446

1877

if list_size.value == 0:

2447

1878

return None

2448

1879

cert = cert_list[0]

2449

1880

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

2450

2451

@staticmethod

2452

def key_id(certificate):

2453

"Convert a certificate bytestring to a hexdigit key ID"

2454

# New GnuTLS "datum" with the public key

2455

datum = gnutls.datum_t(

2456

ctypes.cast(ctypes.c_char_p(certificate),

2457

ctypes.POINTER(ctypes.c_ubyte)),

2458

ctypes.c_uint(len(certificate)))

2459

# XXX all these need to be created in the gnutls "module"

2460

# New empty GnuTLS certificate

2461

pubkey = gnutls.pubkey_t()

2462

gnutls.pubkey_init(ctypes.byref(pubkey))

2463

# Import the raw public key into the certificate

2464

gnutls.pubkey_import(pubkey,

2465

ctypes.byref(datum),

2466

gnutls.X509_FMT_DER)

2467

# New buffer for the key ID

2468

buf = ctypes.create_string_buffer(32)

2469

buf_len = ctypes.c_size_t(len(buf))

2470

# Get the key ID from the raw public key into the buffer

2471

gnutls.pubkey_get_key_id(pubkey,

2472

gnutls.KEYID_USE_SHA256,

2473

ctypes.cast(ctypes.byref(buf),

2474

ctypes.POINTER(ctypes.c_ubyte)),

2475

ctypes.byref(buf_len))

2476

# Deinit the certificate

2477

gnutls.pubkey_deinit(pubkey)

2478

2479

# Convert the buffer to a Python bytestring

2480

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

2481

# Convert the bytestring to hexadecimal notation

2482

hex_key_id = binascii.hexlify(key_id).upper()

2483

return hex_key_id

2484

1881

2485

1882

@staticmethod

2486

1883

def fingerprint(openpgp):

2487

1884

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2488

1885

# New GnuTLS "datum" with the OpenPGP public key

2489

datum = gnutls.datum_t(

1886

datum = gnutls.library.types.gnutls_datum_t(

2490

1887

ctypes.cast(ctypes.c_char_p(openpgp),

2491

1888

ctypes.POINTER(ctypes.c_ubyte)),

2492

1889

ctypes.c_uint(len(openpgp)))

2493

1890

# New empty GnuTLS certificate

2494

crt = gnutls.openpgp_crt_t()

2495

gnutls.openpgp_crt_init(ctypes.byref(crt))

1891

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1892

gnutls.library.functions.gnutls_openpgp_crt_init(

1893

ctypes.byref(crt))

2496

1894

# Import the OpenPGP public key into the certificate

2497

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

2498

gnutls.OPENPGP_FMT_RAW)

1895

gnutls.library.functions.gnutls_openpgp_crt_import(

1896

crt, ctypes.byref(datum),

1897

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2499

1898

# Verify the self signature in the key

2500

1899

crtverify = ctypes.c_uint()

2501

gnutls.openpgp_crt_verify_self(crt, 0,

2502

ctypes.byref(crtverify))

1900

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1901

crt, 0, ctypes.byref(crtverify))

2503

1902

if crtverify.value != 0:

2504

gnutls.openpgp_crt_deinit(crt)

2505

raise gnutls.CertificateSecurityError(code

2506

=crtverify.value)

1903

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1904

raise gnutls.errors.CertificateSecurityError(

1905

"Verify failed")

2507

1906

# New buffer for the fingerprint

2508

1907

buf = ctypes.create_string_buffer(20)

2509

1908

buf_len = ctypes.c_size_t()

2510

1909

# Get the fingerprint from the certificate into the buffer

2511

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

2512

ctypes.byref(buf_len))

1910

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1911

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

2513

1912

# Deinit the certificate

2514

gnutls.openpgp_crt_deinit(crt)

1913

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2515

1914

# Convert the buffer to a Python bytestring

2516

1915

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

2517

1916

# Convert the bytestring to hexadecimal notation

2519

1918

return hex_fpr

2520

1919

2521

1920

2522

class MultiprocessingMixIn:

1921

class MultiprocessingMixIn(object):

2523

1922

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

2524

1923

2525

1924

def sub_process_main(self, request, address):

2526

1925

try:

2527

1926

self.finish_request(request, address)

2528

1927

except Exception:

2529

1928

self.handle_error(request, address)

2530

1929

self.close_request(request)

2531

1930

2532

1931

def process_request(self, request, address):

2533

1932

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

2534

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

2535

args=(request, address))

1933

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

1934

args = (request, address))

2536

1935

proc.start()

2537

1936

return proc

2538

1937

2539

1938

2540

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1939

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2541

1940

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

2542

1941

2543

1942

def process_request(self, request, client_address):

2544

1943

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

2545

1944

2546

1945

This function creates a new pipe in self.pipe

2547

1946

"""

2548

1947

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2549

1948

2550

1949

proc = MultiprocessingMixIn.process_request(self, request,

2551

1950

client_address)

2552

1951

self.child_pipe.close()

2553

1952

self.add_pipe(parent_pipe, proc)

2554

1953

2555

1954

def add_pipe(self, parent_pipe, proc):

2556

1955

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

2557

1956

raise NotImplementedError()

2558

1957

2559

1958

2560

1959

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2561

socketserver.TCPServer):

1960

socketserver.TCPServer, object):

2562

1961

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

2563

1962

2564

1963

Attributes:

2565

1964

enabled: Boolean; whether this server is activated yet

2566

1965

interface: None or a network interface name (string)

2567

1966

use_ipv6: Boolean; to use IPv6 or not

2568

1967

"""

2569

1968

2570

1969

def __init__(self, server_address, RequestHandlerClass,

2571

1970

interface=None,

2572

1971

use_ipv6=True,

2582

1981

self.socketfd = socketfd

2583

1982

# Save the original socket.socket() function

2584

1983

self.socket_socket = socket.socket

2585

2586

1984

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

2587

#

1985

#

2588

1986

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

2589

1987

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

2590

1988

# patching socket.socket.)

2591

#

1989

#

2592

1990

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

2593

1991

@functools.wraps(socket.socket)

2594

1992

def socket_wrapper(*args, **kwargs):

2606

2004

# socket_wrapper(), if socketfd was set.

2607

2005

socketserver.TCPServer.__init__(self, server_address,

2608

2006

RequestHandlerClass)

2609

2007

2610

2008

def server_bind(self):

2611

2009

"""This overrides the normal server_bind() function

2612

2010

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

2613

2011

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

2614

global SO_BINDTODEVICE

2615

2012

if self.interface is not None:

2616

2013

if SO_BINDTODEVICE is None:

2617

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

2618

# common enough.

2619

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

2620

SO_BINDTODEVICE = 25

2621

try:

2622

self.socket.setsockopt(

2623

socket.SOL_SOCKET, SO_BINDTODEVICE,

2624

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

2625

except socket.error as error:

2626

if error.errno == errno.EPERM:

2627

logger.error("No permission to bind to"

2628

" interface %s", self.interface)

2629

elif error.errno == errno.ENOPROTOOPT:

2630

logger.error("SO_BINDTODEVICE not available;"

2631

" cannot bind to interface %s",

2632

self.interface)

2633

elif error.errno == errno.ENODEV:

2634

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

2635

" cannot bind", self.interface)

2636

else:

2637

raise

2014

logger.error("SO_BINDTODEVICE does not exist;"

2015

" cannot bind to interface %s",

2016

self.interface)

2017

else:

2018

try:

2019

self.socket.setsockopt(

2020

socket.SOL_SOCKET, SO_BINDTODEVICE,

2021

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

2022

except socket.error as error:

2023

if error.errno == errno.EPERM:

2024

logger.error("No permission to bind to"

2025

" interface %s", self.interface)

2026

elif error.errno == errno.ENOPROTOOPT:

2027

logger.error("SO_BINDTODEVICE not available;"

2028

" cannot bind to interface %s",

2029

self.interface)

2030

elif error.errno == errno.ENODEV:

2031

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

2032

" cannot bind", self.interface)

2033

else:

2034

raise

2638

2035

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

2639

2036

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

2640

if self.server_address[1]:

2641

self.allow_reuse_address = True

2642

2037

if not self.server_address[0]:

2643

2038

if self.address_family == socket.AF_INET6:

2644

any_address = "::" # in6addr_any

2039

any_address = "::" # in6addr_any

2645

2040

else:

2646

any_address = "0.0.0.0" # INADDR_ANY

2041

any_address = "0.0.0.0" # INADDR_ANY

2647

2042

self.server_address = (any_address,

2648

2043

self.server_address[1])

2649

2044

elif not self.server_address[1]:

2659

2054

2660

2055

class MandosServer(IPv6_TCPServer):

2661

2056

"""Mandos server.

2662

2057

2663

2058

Attributes:

2664

2059

clients: set of Client objects

2665

2060

gnutls_priority GnuTLS priority string

2666

2061

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

2667

2668

Assumes a GLib.MainLoop event loop.

2062

2063

Assumes a gobject.MainLoop event loop.

2669

2064

"""

2670

2065

2671

2066

def __init__(self, server_address, RequestHandlerClass,

2672

2067

interface=None,

2673

2068

use_ipv6=True,

2683

2078

self.gnutls_priority = gnutls_priority

2684

2079

IPv6_TCPServer.__init__(self, server_address,

2685

2080

RequestHandlerClass,

2686

interface=interface,

2687

use_ipv6=use_ipv6,

2688

socketfd=socketfd)

2689

2081

interface = interface,

2082

use_ipv6 = use_ipv6,

2083

socketfd = socketfd)

2084

2690

2085

def server_activate(self):

2691

2086

if self.enabled:

2692

2087

return socketserver.TCPServer.server_activate(self)

2693

2088

2694

2089

def enable(self):

2695

2090

self.enabled = True

2696

2091

2697

2092

def add_pipe(self, parent_pipe, proc):

2698

2093

# Call "handle_ipc" for both data and EOF events

2699

GLib.io_add_watch(

2700

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2701

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2094

gobject.io_add_watch(

2095

parent_pipe.fileno(),

2096

gobject.IO_IN | gobject.IO_HUP,

2702

2097

functools.partial(self.handle_ipc,

2703

parent_pipe=parent_pipe,

2704

proc=proc))

2705

2098

parent_pipe = parent_pipe,

2099

proc = proc))

2100

2706

2101

def handle_ipc(self, source, condition,

2707

2102

parent_pipe=None,

2708

proc=None,

2103

proc = None,

2709

2104

client_object=None):

2710

2105

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

2711

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

2106

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

2712

2107

# Wait for other process to exit

2713

2108

proc.join()

2714

2109

return False

2715

2110

2716

2111

# Read a request from the child

2717

2112

request = parent_pipe.recv()

2718

2113

command = request[0]

2719

2114

2720

2115

if command == 'init':

2721

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

2722

fpr = request[2].decode("ascii")

2723

address = request[3]

2724

2725

for c in self.clients.values():

2726

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2727

continue

2728

if key_id and c.key_id == key_id:

2729

client = c

2730

break

2731

if fpr and c.fingerprint == fpr:

2116

fpr = request[1]

2117

address = request[2]

2118

2119

for c in self.clients.itervalues():

2120

if c.fingerprint == fpr:

2732

2121

client = c

2733

2122

break

2734

2123

else:

2735

logger.info("Client not found for key ID: %s, address"

2736

": %s", key_id or fpr, address)

2124

logger.info("Client not found for fingerprint: %s, ad"

2125

"dress: %s", fpr, address)

2737

2126

if self.use_dbus:

2738

2127

# Emit D-Bus signal

2739

mandos_dbus_service.ClientNotFound(key_id or fpr,

2128

mandos_dbus_service.ClientNotFound(fpr,

2740

2129

address[0])

2741

2130

parent_pipe.send(False)

2742

2131

return False

2743

2744

GLib.io_add_watch(

2745

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2746

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2132

2133

gobject.io_add_watch(

2134

parent_pipe.fileno(),

2135

gobject.IO_IN | gobject.IO_HUP,

2747

2136

functools.partial(self.handle_ipc,

2748

parent_pipe=parent_pipe,

2749

proc=proc,

2750

client_object=client))

2137

parent_pipe = parent_pipe,

2138

proc = proc,

2139

client_object = client))

2751

2140

parent_pipe.send(True)

2752

2141

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

2753

2142

# same fileno

2756

2145

funcname = request[1]

2757

2146

args = request[2]

2758

2147

kwargs = request[3]

2759

2148

2760

2149

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

2761

2150

funcname)(*args,

2762

2151

**kwargs)))

2763

2152

2764

2153

if command == 'getattr':

2765

2154

attrname = request[1]

2766

2155

if isinstance(client_object.__getattribute__(attrname),

2767

collections.abc.Callable):

2156

collections.Callable):

2768

2157

parent_pipe.send(('function', ))

2769

2158

else:

2770

2159

parent_pipe.send((

2771

2160

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

2772

2161

2773

2162

if command == 'setattr':

2774

2163

attrname = request[1]

2775

2164

value = request[2]

2776

2165

setattr(client_object, attrname, value)

2777

2166

2778

2167

return True

2779

2168

2780

2169

2781

2170

def rfc3339_duration_to_delta(duration):

2782

2171

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

2783

2784

>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)

2785

True

2786

>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)

2787

True

2788

>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)

2789

True

2790

>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)

2791

True

2792

>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)

2793

True

2794

>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)

2795

True

2796

>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)

2797

True

2172

2173

>>> rfc3339_duration_to_delta("P7D")

2174

datetime.timedelta(7)

2175

>>> rfc3339_duration_to_delta("PT60S")

2176

datetime.timedelta(0, 60)

2177

>>> rfc3339_duration_to_delta("PT60M")

2178

datetime.timedelta(0, 3600)

2179

>>> rfc3339_duration_to_delta("PT24H")

2180

datetime.timedelta(1)

2181

>>> rfc3339_duration_to_delta("P1W")

2182

datetime.timedelta(7)

2183

>>> rfc3339_duration_to_delta("PT5M30S")

2184

datetime.timedelta(0, 330)

2185

>>> rfc3339_duration_to_delta("P1DT3M20S")

2186

datetime.timedelta(1, 200)

2798

2187

"""

2799

2188

2800

2189

# Parsing an RFC 3339 duration with regular expressions is not

2801

2190

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

2802

2191

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

2803

2192

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

2804

2193

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

2805

2194

# avoid excessive use of external libraries.

2806

2195

2807

2196

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

2808

2197

Token = collections.namedtuple("Token", (

2809

2198

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

2842

2231

frozenset((token_year, token_month,

2843

2232

token_day, token_time,

2844

2233

token_week)))

2845

# Define starting values:

2846

# Value so far

2847

value = datetime.timedelta()

2234

# Define starting values

2235

value = datetime.timedelta() # Value so far

2848

2236

found_token = None

2849

# Following valid tokens

2850

followers = frozenset((token_duration, ))

2851

# String left to parse

2852

s = duration

2237

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

2238

s = duration # String left to parse

2853

2239

# Loop until end token is found

2854

2240

while found_token is not token_end:

2855

2241

# Search for any currently valid tokens

2879

2265

2880

2266

def string_to_delta(interval):

2881

2267

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

2882

2883

>>> string_to_delta('7d') == datetime.timedelta(7)

2884

True

2885

>>> string_to_delta('60s') == datetime.timedelta(0, 60)

2886

True

2887

>>> string_to_delta('60m') == datetime.timedelta(0, 3600)

2888

True

2889

>>> string_to_delta('24h') == datetime.timedelta(1)

2890

True

2891

>>> string_to_delta('1w') == datetime.timedelta(7)

2892

True

2893

>>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)

2894

True

2268

2269

>>> string_to_delta('7d')

2270

datetime.timedelta(7)

2271

>>> string_to_delta('60s')

2272

datetime.timedelta(0, 60)

2273

>>> string_to_delta('60m')

2274

datetime.timedelta(0, 3600)

2275

>>> string_to_delta('24h')

2276

datetime.timedelta(1)

2277

>>> string_to_delta('1w')

2278

datetime.timedelta(7)

2279

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

2280

datetime.timedelta(0, 330)

2895

2281

"""

2896

2282

2897

2283

try:

2898

2284

return rfc3339_duration_to_delta(interval)

2899

2285

except ValueError:

2900

2286

pass

2901

2287

2902

2288

timevalue = datetime.timedelta(0)

2903

2289

for s in interval.split():

2904

2290

try:

2922

2308

return timevalue

2923

2309

2924

2310

2925

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

2311

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

2926

2312

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

2927

2313

2928

2314

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

2929

2315

if os.fork():

2930

2316

sys.exit()

2948

2334

2949

2335

2950

2336

def main():

2951

2337

2952

2338

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

2953

2339

# Parsing of options, both command line and config file

2954

2340

2955

2341

parser = argparse.ArgumentParser()

2956

2342

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

2957

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

2343

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

2958

2344

help="show version number and exit")

2959

2345

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

2960

2346

help="Bind to interface IF")

2996

2382

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

2997

2383

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

2998

2384

default=None)

2999

2385

3000

2386

options = parser.parse_args()

3001

2387

2388

if options.check:

2389

import doctest

2390

fail_count, test_count = doctest.testmod()

2391

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

2392

3002

2393

# Default values for config file for server-global settings

3003

if gnutls.has_rawpk:

3004

priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"

3005

":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")

3006

else:

3007

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

3008

":+SIGN-DSA-SHA256")

3009

server_defaults = {"interface": "",

3010

"address": "",

3011

"port": "",

3012

"debug": "False",

3013

"priority": priority,

3014

"servicename": "Mandos",

3015

"use_dbus": "True",

3016

"use_ipv6": "True",

3017

"debuglevel": "",

3018

"restore": "True",

3019

"socket": "",

3020

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

3021

"foreground": "False",

3022

"zeroconf": "True",

3023

}

3024

del priority

3025

2394

server_defaults = { "interface": "",

2395

"address": "",

2396

"port": "",

2397

"debug": "False",

2398

"priority":

2399

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

2400

":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2401

"servicename": "Mandos",

2402

"use_dbus": "True",

2403

"use_ipv6": "True",

2404

"debuglevel": "",

2405

"restore": "True",

2406

"socket": "",

2407

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

2408

"foreground": "False",

2409

"zeroconf": "True",

2410

}

2411

3026

2412

# Parse config file for server-global settings

3027

server_config = configparser.ConfigParser(server_defaults)

2413

server_config = configparser.SafeConfigParser(server_defaults)

3028

2414

del server_defaults

3029

2415

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

3030

# Convert the ConfigParser object to a dict

2416

# Convert the SafeConfigParser object to a dict

3031

2417

server_settings = server_config.defaults()

3032

2418

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

3033

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

3034

"foreground", "zeroconf"):

2419

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

3035

2420

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

3036

2421

option)

3037

2422

if server_settings["port"]:

3047

2432

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

3048

2433

["socket"])

3049

2434

del server_config

3050

2435

3051

2436

# Override the settings from the config file with command line

3052

2437

# options, if set.

3053

2438

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

3071

2456

if server_settings["debug"]:

3072

2457

server_settings["foreground"] = True

3073

2458

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

3074

2459

3075

2460

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

3076

2461

3077

2462

if (not server_settings["zeroconf"]

3078

2463

and not (server_settings["port"]

3079

2464

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

3080

2465

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

3081

2466

3082

2467

# For convenience

3083

2468

debug = server_settings["debug"]

3084

2469

debuglevel = server_settings["debuglevel"]

3088

2473

stored_state_file)

3089

2474

foreground = server_settings["foreground"]

3090

2475

zeroconf = server_settings["zeroconf"]

3091

2476

3092

2477

if debug:

3093

2478

initlogger(debug, logging.DEBUG)

3094

2479

else:

3097

2482

else:

3098

2483

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

3099

2484

initlogger(debug, level)

3100

2485

3101

2486

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

3102

2487

syslogger.setFormatter(

3103

2488

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

3104

2489

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

3105

2490

server_settings["servicename"])))

3106

2491

3107

2492

# Parse config file with clients

3108

client_config = configparser.ConfigParser(Client.client_defaults)

2493

client_config = configparser.SafeConfigParser(Client

2494

.client_defaults)

3109

2495

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

3110

2496

"clients.conf"))

3111

2497

3112

2498

global mandos_dbus_service

3113

2499

mandos_dbus_service = None

3114

2500

3115

2501

socketfd = None

3116

2502

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

3117

2503

socketfd = server_settings["socket"]

3133

2519

except IOError as e:

3134

2520

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

3135

2521

exc_info=e)

3136

3137

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

3138

("mandos", "mandos"),

3139

("nobody", "nogroup")):

2522

2523

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

3140

2524

try:

3141

2525

uid = pwd.getpwnam(name).pw_uid

3142

gid = pwd.getpwnam(group).pw_gid

2526

gid = pwd.getpwnam(name).pw_gid

3143

2527

break

3144

2528

except KeyError:

3145

2529

continue

3149

2533

try:

3150

2534

os.setgid(gid)

3151

2535

os.setuid(uid)

3152

if debug:

3153

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

3154

gid))

3155

2536

except OSError as error:

3156

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

3157

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

3158

2537

if error.errno != errno.EPERM:

3159

2538

raise

3160

2539

3161

2540

if debug:

3162

2541

# Enable all possible GnuTLS debugging

3163

2542

3164

2543

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

3165

2544

# - GnuTLS manual

3166

gnutls.global_set_log_level(11)

3167

3168

@gnutls.log_func

2545

gnutls.library.functions.gnutls_global_set_log_level(11)

2546

2547

@gnutls.library.types.gnutls_log_func

3169

2548

def debug_gnutls(level, string):

3170

2549

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

3171

3172

gnutls.global_set_log_function(debug_gnutls)

3173

2550

2551

gnutls.library.functions.gnutls_global_set_log_function(

2552

debug_gnutls)

2553

3174

2554

# Redirect stdin so all checkers get /dev/null

3175

2555

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

3176

2556

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

3177

2557

if null > 2:

3178

2558

os.close(null)

3179

2559

3180

2560

# Need to fork before connecting to D-Bus

3181

2561

if not foreground:

3182

2562

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

3183

2563

daemon()

3184

3185

if gi.version_info < (3, 10, 2):

3186

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

3187

# need to inform GLib that threads will be used.

3188

GLib.threads_init()

3189

2564

2565

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

2566

# need to inform gobject that threads will be used.

2567

gobject.threads_init()

2568

3190

2569

global main_loop

3191

2570

# From the Avahi example code

3192

2571

DBusGMainLoop(set_as_default=True)

3193

main_loop = GLib.MainLoop()

2572

main_loop = gobject.MainLoop()

3194

2573

bus = dbus.SystemBus()

3195

2574

# End of Avahi example code

3196

2575

if use_dbus:

3209

2588

if zeroconf:

3210

2589

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3211

2590

service = AvahiServiceToSyslog(

3212

name=server_settings["servicename"],

3213

servicetype="_mandos._tcp",

3214

protocol=protocol,

3215

bus=bus)

2591

name = server_settings["servicename"],

2592

servicetype = "_mandos._tcp",

2593

protocol = protocol,

2594

bus = bus)

3216

2595

if server_settings["interface"]:

3217

2596

service.interface = if_nametoindex(

3218

2597

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

3219

2598

3220

2599

global multiprocessing_manager

3221

2600

multiprocessing_manager = multiprocessing.Manager()

3222

2601

3223

2602

client_class = Client

3224

2603

if use_dbus:

3225

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

3226

2604

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

2605

3227

2606

client_settings = Client.config_parser(client_config)

3228

2607

old_client_settings = {}

3229

2608

clients_data = {}

3230

2609

3231

2610

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

3232

2611

global wnull

3233

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

2612

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

3234

2613

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

3235

2614

# mode

3236

2615

if debug or not foreground:

3237

2616

wnull.close()

3238

2617

3239

2618

# Get client data and settings from last running state.

3240

2619

if server_settings["restore"]:

3241

2620

try:

3242

2621

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

3243

if sys.version_info.major == 2:

3244

clients_data, old_client_settings = pickle.load(

3245

stored_state)

3246

else:

3247

bytes_clients_data, bytes_old_client_settings = (

3248

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

3249

# Fix bytes to strings

3250

# clients_data

3251

# .keys()

3252

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

3253

if isinstance(key, bytes)

3254

else key): value

3255

for key, value in

3256

bytes_clients_data.items()}

3257

del bytes_clients_data

3258

for key in clients_data:

3259

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

3260

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

3261

for k, v in

3262

clients_data[key].items()}

3263

clients_data[key] = value

3264

# .client_structure

3265

value["client_structure"] = [

3266

(s.decode("utf-8")

3267

if isinstance(s, bytes)

3268

else s) for s in

3269

value["client_structure"]]

3270

# .name, .host, and .checker_command

3271

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

3272

if isinstance(value[k], bytes):

3273

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

3274

if "key_id" not in value:

3275

value["key_id"] = ""

3276

elif "fingerprint" not in value:

3277

value["fingerprint"] = ""

3278

# old_client_settings

3279

# .keys()

3280

old_client_settings = {

3281

(key.decode("utf-8")

3282

if isinstance(key, bytes)

3283

else key): value

3284

for key, value in

3285

bytes_old_client_settings.items()}

3286

del bytes_old_client_settings

3287

# .host and .checker_command

3288

for value in old_client_settings.values():

3289

for attribute in ("host", "checker_command"):

3290

if isinstance(value[attribute], bytes):

3291

value[attribute] = (value[attribute]

3292

.decode("utf-8"))

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

3293

2624

os.remove(stored_state_path)

3294

2625

except IOError as e:

3295

2626

if e.errno == errno.ENOENT:

3303

2634

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

3304

2635

"EOFError:",

3305

2636

exc_info=e)

3306

2637

3307

2638

with PGPEngine() as pgp:

3308

2639

for client_name, client in clients_data.items():

3309

2640

# Skip removed clients

3310

2641

if client_name not in client_settings:

3311

2642

continue

3312

2643

3313

2644

# Decide which value to use after restoring saved state.

3314

2645

# We have three different values: Old config file,

3315

2646

# new config file, and saved state.

3326

2657

client[name] = value

3327

2658

except KeyError:

3328

2659

pass

3329

2660

3330

2661

# Clients who has passed its expire date can still be

3331

2662

# enabled if its last checker was successful. A Client

3332

2663

# whose checker succeeded before we stored its state is

3365

2696

client_name))

3366

2697

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

3367

2698

["secret"])

3368

2699

3369

2700

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

3370

2701

for client_name in (set(old_client_settings)

3371

2702

- set(client_settings)):

3373

2704

for client_name in (set(client_settings)

3374

2705

- set(old_client_settings)):

3375

2706

clients_data[client_name] = client_settings[client_name]

3376

2707

3377

2708

# Create all client objects

3378

2709

for client_name, client in clients_data.items():

3379

2710

tcp_server.clients[client_name] = client_class(

3380

name=client_name,

3381

settings=client,

3382

server_settings=server_settings)

3383

2711

name = client_name,

2712

settings = client,

2713

server_settings = server_settings)

2714

3384

2715

if not tcp_server.clients:

3385

2716

logger.warning("No clients defined")

3386

2717

3387

2718

if not foreground:

3388

2719

if pidfile is not None:

3389

2720

pid = os.getpid()

3395

2726

pidfilename, pid)

3396

2727

del pidfile

3397

2728

del pidfilename

3398

3399

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

3400

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3401

lambda: main_loop.quit() and False)

3402

2729

2730

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

2731

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

2732

3403

2733

if use_dbus:

3404

2734

3405

2735

@alternate_dbus_interfaces(

3406

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

3407

class MandosDBusService(DBusObjectWithObjectManager):

2736

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

2737

class MandosDBusService(DBusObjectWithProperties):

3408

2738

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

3409

2739

3410

2740

def __init__(self):

3411

2741

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

3412

2742

3413

2743

_interface = "se.recompile.Mandos"

3414

2744

2745

@dbus_interface_annotations(_interface)

2746

def _foo(self):

2747

return {

2748

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

2749

"false" }

2750

3415

2751

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

3416

2752

def ClientAdded(self, objpath):

3417

2753

"D-Bus signal"

3418

2754

pass

3419

2755

3420

2756

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

3421

def ClientNotFound(self, key_id, address):

2757

def ClientNotFound(self, fingerprint, address):

3422

2758

"D-Bus signal"

3423

2759

pass

3424

3425

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

3426

"true"})

2760

3427

2761

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

3428

2762

def ClientRemoved(self, objpath, name):

3429

2763

"D-Bus signal"

3430

2764

pass

3431

3432

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

3433

"true"})

2765

3434

2766

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

3435

2767

def GetAllClients(self):

3436

2768

"D-Bus method"

3437

2769

return dbus.Array(c.dbus_object_path for c in

3438

tcp_server.clients.values())

3439

3440

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

3441

"true"})

2770

tcp_server.clients.itervalues())

2771

3442

2772

@dbus.service.method(_interface,

3443

2773

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

3444

2774

def GetAllClientsWithProperties(self):

3445

2775

"D-Bus method"

3446

2776

return dbus.Dictionary(

3447

{c.dbus_object_path: c.GetAll(

3448

"se.recompile.Mandos.Client")

3449

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

2777

{ c.dbus_object_path: c.GetAll("")

2778

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

3450

2779

signature="oa{sv}")

3451

2780

3452

2781

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

3453

2782

def RemoveClient(self, object_path):

3454

2783

"D-Bus method"

3455

for c in tcp_server.clients.values():

2784

for c in tcp_server.clients.itervalues():

3456

2785

if c.dbus_object_path == object_path:

3457

2786

del tcp_server.clients[c.name]

3458

2787

c.remove_from_connection()

3459

# Don't signal the disabling

2788

# Don't signal anything except ClientRemoved

3460

2789

c.disable(quiet=True)

3461

# Emit D-Bus signal for removal

3462

self.client_removed_signal(c)

2790

# Emit D-Bus signal

2791

self.ClientRemoved(object_path, c.name)

3463

2792

return

3464

2793

raise KeyError(object_path)

3465

2794

3466

2795

del _interface

3467

3468

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3469

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

3470

def GetManagedObjects(self):

3471

"""D-Bus method"""

3472

return dbus.Dictionary(

3473

{client.dbus_object_path:

3474

dbus.Dictionary(

3475

{interface: client.GetAll(interface)

3476

for interface in

3477

client._get_all_interface_names()})

3478

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

3479

3480

def client_added_signal(self, client):

3481

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

3482

if use_dbus:

3483

# New standard signal

3484

self.InterfacesAdded(

3485

client.dbus_object_path,

3486

dbus.Dictionary(

3487

{interface: client.GetAll(interface)

3488

for interface in

3489

client._get_all_interface_names()}))

3490

# Old signal

3491

self.ClientAdded(client.dbus_object_path)

3492

3493

def client_removed_signal(self, client):

3494

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

3495

if use_dbus:

3496

# New standard signal

3497

self.InterfacesRemoved(

3498

client.dbus_object_path,

3499

client._get_all_interface_names())

3500

# Old signal

3501

self.ClientRemoved(client.dbus_object_path,

3502

client.name)

3503

2796

3504

2797

mandos_dbus_service = MandosDBusService()

3505

3506

# Save modules to variables to exempt the modules from being

3507

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

3508

mp = multiprocessing

3509

wn = wnull

3510

2798

3511

2799

def cleanup():

3512

2800

"Cleanup function; run on exit"

3513

2801

if zeroconf:

3514

2802

service.cleanup()

3515

3516

mp.active_children()

3517

wn.close()

2803

2804

multiprocessing.active_children()

2805

wnull.close()

3518

2806

if not (tcp_server.clients or client_settings):

3519

2807

return

3520

2808

3521

2809

# Store client before exiting. Secrets are encrypted with key

3522

2810

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

3523

2811

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

3524

2812

clients = {}

3525

2813

with PGPEngine() as pgp:

3526

for client in tcp_server.clients.values():

2814

for client in tcp_server.clients.itervalues():

3527

2815

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

3528

2816

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

3529

2817

key)

3530

2818

client_dict = {}

3531

2819

3532

2820

# A list of attributes that can not be pickled

3533

2821

# + secret.

3534

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

3535

"checker", "server_settings"}

2822

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

2823

"checker", "server_settings" }

3536

2824

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

3537

2825

.Object):

3538

2826

exclude.add(name)

3539

2827

3540

2828

client_dict["encrypted_secret"] = (client

3541

2829

.encrypted_secret)

3542

2830

for attr in client.client_structure:

3543

2831

if attr not in exclude:

3544

2832

client_dict[attr] = getattr(client, attr)

3545

2833

3546

2834

clients[client.name] = client_dict

3547

2835

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

3548

2836

3549

2837

try:

3550

2838

with tempfile.NamedTemporaryFile(

3551

2839

mode='wb',

3553

2841

prefix='clients-',

3554

2842

dir=os.path.dirname(stored_state_path),

3555

2843

delete=False) as stored_state:

3556

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

3557

protocol=2)

2844

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

3558

2845

tempname = stored_state.name

3559

2846

os.rename(tempname, stored_state_path)

3560

2847

except (IOError, OSError) as e:

3570

2857

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

3571

2858

exc_info=e)

3572

2859

raise

3573

2860

3574

2861

# Delete all clients, and settings from config

3575

2862

while tcp_server.clients:

3576

2863

name, client = tcp_server.clients.popitem()

3577

2864

if use_dbus:

3578

2865

client.remove_from_connection()

3579

# Don't signal the disabling

2866

# Don't signal anything except ClientRemoved

3580

2867

client.disable(quiet=True)

3581

# Emit D-Bus signal for removal

3582

2868

if use_dbus:

3583

mandos_dbus_service.client_removed_signal(client)

2869

# Emit D-Bus signal

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

3584

2872

client_settings.clear()

3585

2873

3586

2874

atexit.register(cleanup)

3587

3588

for client in tcp_server.clients.values():

2875

2876

for client in tcp_server.clients.itervalues():

3589

2877

if use_dbus:

3590

# Emit D-Bus signal for adding

3591

mandos_dbus_service.client_added_signal(client)

2878

# Emit D-Bus signal

2879

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3592

2880

# Need to initiate checking of clients

3593

2881

if client.enabled:

3594

2882

client.init_checker()

3595

2883

3596

2884

tcp_server.enable()

3597

2885

tcp_server.server_activate()

3598

2886

3599

2887

# Find out what port we got

3600

2888

if zeroconf:

3601

2889

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

3606

2894

else: # IPv4

3607

2895

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

3608

2896

*tcp_server.socket.getsockname())

3609

3610

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

3611

2897

2898

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

2899

3612

2900

try:

3613

2901

if zeroconf:

3614

2902

# From the Avahi example code

3619

2907

cleanup()

3620

2908

sys.exit(1)

3621

2909

# End of Avahi example code

3622

3623

GLib.io_add_watch(

3624

GLib.IOChannel.unix_new(tcp_server.fileno()),

3625

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3626

lambda *args, **kwargs: (tcp_server.handle_request

3627

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

3628

2910

2911

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

2912

lambda *args, **kwargs:

2913

(tcp_server.handle_request

2914

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

2915

3629

2916

logger.debug("Starting main loop")

3630

2917

main_loop.run()

3631

2918

except AvahiError as error:

3640

2927

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

3641

2928

cleanup()

3642

2929

3643

3644

def should_only_run_tests():

3645

parser = argparse.ArgumentParser(add_help=False)

3646

parser.add_argument("--check", action='store_true')

3647

args, unknown_args = parser.parse_known_args()

3648

run_tests = args.check

3649

if run_tests:

3650

# Remove --check argument from sys.argv

3651

sys.argv[1:] = unknown_args

3652

return run_tests

3653

3654

# Add all tests from doctest strings

3655

def load_tests(loader, tests, none):

3656

import doctest

3657

tests.addTests(doctest.DocTestSuite())

3658

return tests

3659

2930

3660

2931

if __name__ == '__main__':

3661

try:

3662

if should_only_run_tests():

3663

# Call using ./mandos --check [--verbose]

3664

unittest.main()

3665

else:

3666

main()

3667

finally:

3668

logging.shutdown()

2932

main()