/mandos/release : revision 237.7.174

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/python

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

try:

44

import SocketServer as socketserver

45

except ImportError:

46

import socketserver

39

import SocketServer as socketserver

47

40

import socket

48

41

import argparse

49

42

import datetime

50

43

import errno

51

try:

52

import ConfigParser as configparser

53

except ImportError:

54

import configparser

44

import gnutls.crypto

45

import gnutls.connection

46

import gnutls.errors

47

import gnutls.library.functions

48

import gnutls.library.constants

49

import gnutls.library.types

50

import ConfigParser as configparser

55

51

import sys

56

52

import re

57

53

import os

66

62

import struct

67

63

import fcntl

68

64

import functools

69

try:

70

import cPickle as pickle

71

except ImportError:

72

import pickle

65

import cPickle as pickle

73

66

import multiprocessing

74

67

import types

75

68

import binascii

76

69

import tempfile

77

70

import itertools

78

71

import collections

79

import codecs

80

import unittest

81

import random

82

72

83

73

import dbus

84

74

import dbus.service

85

import gi

86

from gi.repository import GLib

75

import gobject

76

import avahi

87

77

from dbus.mainloop.glib import DBusGMainLoop

88

78

import ctypes

89

79

import ctypes.util

90

80

import xml.dom.minidom

91

81

import inspect

92

82

93

if sys.version_info.major == 2:

94

__metaclass__ = type

95

str = unicode

96

97

# Show warnings by default

98

if not sys.warnoptions:

99

import warnings

100

warnings.simplefilter("default")

101

102

# Try to find the value of SO_BINDTODEVICE:

103

83

try:

104

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

105

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

106

84

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

107

85

except AttributeError:

108

86

try:

109

# This is where SO_BINDTODEVICE was up to and including Python

110

# 2.6, and also 3.2:

111

87

from IN import SO_BINDTODEVICE

112

88

except ImportError:

113

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

114

# Try running the C preprocessor:

115

try:

116

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

117

"/dev/stdin"],

118

stdin=subprocess.PIPE,

119

stdout=subprocess.PIPE)

120

stdout = cc.communicate(

121

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

122

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

123

except (OSError, ValueError, IndexError):

124

# No value found

125

SO_BINDTODEVICE = None

126

127

if sys.version_info < (3, 2):

128

configparser.Configparser = configparser.SafeConfigParser

129

130

version = "1.8.9"

89

SO_BINDTODEVICE = None

90

91

version = "1.6.1"

131

92

stored_state_file = "clients.pickle"

132

93

133

94

logger = logging.getLogger()

134

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

135

syslogger = None

95

syslogger = (logging.handlers.SysLogHandler

96

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

97

address = str("/dev/log")))

136

98

137

99

try:

138

if_nametoindex = ctypes.cdll.LoadLibrary(

139

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

100

if_nametoindex = (ctypes.cdll.LoadLibrary

101

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

102

.if_nametoindex)

140

103

except (OSError, AttributeError):

141

142

104

def if_nametoindex(interface):

143

105

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

144

106

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

145

107

with contextlib.closing(socket.socket()) as s:

146

108

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

147

struct.pack(b"16s16x", interface))

148

interface_index = struct.unpack("I", ifreq[16:20])[0]

109

struct.pack(str("16s16x"),

110

interface))

111

interface_index = struct.unpack(str("I"),

112

ifreq[16:20])[0]

149

113

return interface_index

150

114

151

115

152

def copy_function(func):

153

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

154

if sys.version_info.major == 2:

155

return types.FunctionType(func.func_code,

156

func.func_globals,

157

func.func_name,

158

func.func_defaults,

159

func.func_closure)

160

else:

161

return types.FunctionType(func.__code__,

162

func.__globals__,

163

func.__name__,

164

func.__defaults__,

165

func.__closure__)

166

167

168

116

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

169

117

"""init logger and add loglevel"""

170

171

global syslogger

172

syslogger = (logging.handlers.SysLogHandler(

173

facility=logging.handlers.SysLogHandler.LOG_DAEMON,

174

address="/dev/log"))

118

175

119

syslogger.setFormatter(logging.Formatter

176

120

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

177

121

' %(message)s'))

178

122

logger.addHandler(syslogger)

179

123

180

124

if debug:

181

125

console = logging.StreamHandler()

182

126

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

192

136

pass

193

137

194

138

195

class PGPEngine:

139

class PGPEngine(object):

196

140

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

197

198

141

def __init__(self):

199

142

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

200

self.gpg = "gpg"

201

try:

202

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

203

for line in output.splitlines():

204

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

205

if name == b"gpg":

206

self.gpg = path

207

break

208

except OSError as e:

209

if e.errno != errno.ENOENT:

210

raise

211

143

self.gnupgargs = ['--batch',

212

'--homedir', self.tempdir,

144

'--home', self.tempdir,

213

145

'--force-mdc',

214

'--quiet']

215

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

216

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

217

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

218

146

'--quiet',

147

'--no-use-agent']

148

219

149

def __enter__(self):

220

150

return self

221

151

222

152

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

223

153

self._cleanup()

224

154

return False

225

155

226

156

def __del__(self):

227

157

self._cleanup()

228

158

229

159

def _cleanup(self):

230

160

if self.tempdir is not None:

231

161

# Delete contents of tempdir

232

162

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

233

topdown=False):

163

topdown = False):

234

164

for filename in files:

235

165

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

236

166

for dirname in dirs:

238

168

# Remove tempdir

239

169

os.rmdir(self.tempdir)

240

170

self.tempdir = None

241

171

242

172

def password_encode(self, password):

243

173

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

244

174

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

245

encoded = b"mandos" + binascii.hexlify(password)

246

if len(encoded) > 2048:

247

# GnuPG can't handle long passwords, so encode differently

248

encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

249

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

250

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

251

return encoded

252

175

return b"mandos" + binascii.hexlify(password)

176

253

177

def encrypt(self, data, password):

254

178

passphrase = self.password_encode(password)

255

with tempfile.NamedTemporaryFile(

256

dir=self.tempdir) as passfile:

179

with tempfile.NamedTemporaryFile(dir=self.tempdir

180

) as passfile:

257

181

passfile.write(passphrase)

258

182

passfile.flush()

259

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

183

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

260

184

'--passphrase-file',

261

185

passfile.name]

262

186

+ self.gnupgargs,

263

stdin=subprocess.PIPE,

264

stdout=subprocess.PIPE,

265

stderr=subprocess.PIPE)

266

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

187

stdin = subprocess.PIPE,

188

stdout = subprocess.PIPE,

189

stderr = subprocess.PIPE)

190

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

267

191

if proc.returncode != 0:

268

192

raise PGPError(err)

269

193

return ciphertext

270

194

271

195

def decrypt(self, data, password):

272

196

passphrase = self.password_encode(password)

273

with tempfile.NamedTemporaryFile(

274

dir=self.tempdir) as passfile:

197

with tempfile.NamedTemporaryFile(dir = self.tempdir

198

) as passfile:

275

199

passfile.write(passphrase)

276

200

passfile.flush()

277

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

201

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

278

202

'--passphrase-file',

279

203

passfile.name]

280

204

+ self.gnupgargs,

281

stdin=subprocess.PIPE,

282

stdout=subprocess.PIPE,

283

stderr=subprocess.PIPE)

284

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

205

stdin = subprocess.PIPE,

206

stdout = subprocess.PIPE,

207

stderr = subprocess.PIPE)

208

decrypted_plaintext, err = proc.communicate(input

209

= data)

285

210

if proc.returncode != 0:

286

211

raise PGPError(err)

287

212

return decrypted_plaintext

288

213

289

214

290

# Pretend that we have an Avahi module

291

class avahi:

292

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

293

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

294

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

295

PROTO_INET = 0 # avahi-common/address.h

296

PROTO_INET6 = 1 # avahi-common/address.h

297

DBUS_NAME = "org.freedesktop.Avahi"

298

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

299

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

300

DBUS_PATH_SERVER = "/"

301

302

@staticmethod

303

def string_array_to_txt_array(t):

304

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

305

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

306

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

307

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

308

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

309

SERVER_INVALID = 0 # avahi-common/defs.h

310

SERVER_REGISTERING = 1 # avahi-common/defs.h

311

SERVER_RUNNING = 2 # avahi-common/defs.h

312

SERVER_COLLISION = 3 # avahi-common/defs.h

313

SERVER_FAILURE = 4 # avahi-common/defs.h

314

315

316

215

class AvahiError(Exception):

317

216

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

318

217

self.value = value

319

return super(AvahiError, self).__init__(value, *args,

320

**kwargs)

321

218

super(AvahiError, self).__init__(value, *args, **kwargs)

219

def __unicode__(self):

220

return unicode(repr(self.value))

322

221

323

222

class AvahiServiceError(AvahiError):

324

223

pass

325

224

326

327

225

class AvahiGroupError(AvahiError):

328

226

pass

329

227

330

228

331

class AvahiService:

229

class AvahiService(object):

332

230

"""An Avahi (Zeroconf) service.

333

231

334

232

Attributes:

335

233

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

336

234

Used to optionally bind to the specified interface.

348

246

server: D-Bus Server

349

247

bus: dbus.SystemBus()

350

248

"""

351

352

def __init__(self,

353

interface=avahi.IF_UNSPEC,

354

name=None,

355

servicetype=None,

356

port=None,

357

TXT=None,

358

domain="",

359

host="",

360

max_renames=32768,

361

protocol=avahi.PROTO_UNSPEC,

362

bus=None):

249

250

def __init__(self, interface = avahi.IF_UNSPEC, name = None,

251

servicetype = None, port = None, TXT = None,

252

domain = "", host = "", max_renames = 32768,

253

protocol = avahi.PROTO_UNSPEC, bus = None):

363

254

self.interface = interface

364

255

self.name = name

365

256

self.type = servicetype

374

265

self.server = None

375

266

self.bus = bus

376

267

self.entry_group_state_changed_match = None

377

378

def rename(self, remove=True):

268

269

def rename(self):

379

270

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

380

271

if self.rename_count >= self.max_renames:

381

272

logger.critical("No suitable Zeroconf service name found"

382

273

" after %i retries, exiting.",

383

274

self.rename_count)

384

275

raise AvahiServiceError("Too many renames")

385

self.name = str(

386

self.server.GetAlternativeServiceName(self.name))

387

self.rename_count += 1

276

self.name = unicode(self.server

277

.GetAlternativeServiceName(self.name))

388

278

logger.info("Changing Zeroconf service name to %r ...",

389

279

self.name)

390

if remove:

391

self.remove()

280

self.remove()

392

281

try:

393

282

self.add()

394

283

except dbus.exceptions.DBusException as error:

395

if (error.get_dbus_name()

396

== "org.freedesktop.Avahi.CollisionError"):

397

logger.info("Local Zeroconf service name collision.")

398

return self.rename(remove=False)

399

else:

400

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

401

self.cleanup()

402

os._exit(1)

403

284

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

285

self.cleanup()

286

os._exit(1)

287

self.rename_count += 1

288

404

289

def remove(self):

405

290

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

406

291

if self.entry_group_state_changed_match is not None:

408

293

self.entry_group_state_changed_match = None

409

294

if self.group is not None:

410

295

self.group.Reset()

411

296

412

297

def add(self):

413

298

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

414

299

self.remove()

431

316

dbus.UInt16(self.port),

432

317

avahi.string_array_to_txt_array(self.TXT))

433

318

self.group.Commit()

434

319

435

320

def entry_group_state_changed(self, state, error):

436

321

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

437

322

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

438

323

439

324

if state == avahi.ENTRY_GROUP_ESTABLISHED:

440

325

logger.debug("Zeroconf service established.")

441

326

elif state == avahi.ENTRY_GROUP_COLLISION:

443

328

self.rename()

444

329

elif state == avahi.ENTRY_GROUP_FAILURE:

445

330

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

446

str(error))

447

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

448

331

unicode(error))

332

raise AvahiGroupError("State changed: {0!s}"

333

.format(error))

334

449

335

def cleanup(self):

450

336

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

451

337

if self.group is not None:

456

342

pass

457

343

self.group = None

458

344

self.remove()

459

345

460

346

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

461

347

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

462

348

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

463

bad_states = {

464

avahi.SERVER_INVALID: "Zeroconf server invalid",

465

avahi.SERVER_REGISTERING: None,

466

avahi.SERVER_COLLISION: "Zeroconf server name collision",

467

avahi.SERVER_FAILURE: "Zeroconf server failure",

468

}

349

bad_states = { avahi.SERVER_INVALID:

350

"Zeroconf server invalid",

351

avahi.SERVER_REGISTERING: None,

352

avahi.SERVER_COLLISION:

353

"Zeroconf server name collision",

354

avahi.SERVER_FAILURE:

355

"Zeroconf server failure" }

469

356

if state in bad_states:

470

357

if bad_states[state] is not None:

471

358

if error is None:

474

361

logger.error(bad_states[state] + ": %r", error)

475

362

self.cleanup()

476

363

elif state == avahi.SERVER_RUNNING:

477

try:

478

self.add()

479

except dbus.exceptions.DBusException as error:

480

if (error.get_dbus_name()

481

== "org.freedesktop.Avahi.CollisionError"):

482

logger.info("Local Zeroconf service name"

483

" collision.")

484

return self.rename(remove=False)

485

else:

486

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

487

self.cleanup()

488

os._exit(1)

364

self.add()

489

365

else:

490

366

if error is None:

491

367

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

492

368

else:

493

369

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

494

370

495

371

def activate(self):

496

372

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

497

373

if self.server is None:

501

377

follow_name_owner_changes=True),

502

378

avahi.DBUS_INTERFACE_SERVER)

503

379

self.server.connect_to_signal("StateChanged",

504

self.server_state_changed)

380

self.server_state_changed)

505

381

self.server_state_changed(self.server.GetState())

506

382

507

383

508

384

class AvahiServiceToSyslog(AvahiService):

509

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

385

def rename(self):

510

386

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

511

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

512

syslogger.setFormatter(logging.Formatter(

513

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

514

.format(self.name)))

387

ret = AvahiService.rename(self)

388

syslogger.setFormatter(logging.Formatter

389

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

390

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

391

.format(self.name)))

515

392

return ret

516

393

517

394

518

# Pretend that we have a GnuTLS module

519

class gnutls:

520

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

521

522

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

523

if library is None:

524

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

525

_library = ctypes.cdll.LoadLibrary(library)

526

del library

527

528

# Unless otherwise indicated, the constants and types below are

529

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

530

531

# Constants

532

E_SUCCESS = 0

533

E_INTERRUPTED = -52

534

E_AGAIN = -28

535

CRT_OPENPGP = 2

536

CRT_RAWPK = 3

537

CLIENT = 2

538

SHUT_RDWR = 0

539

CRD_CERTIFICATE = 1

540

E_NO_CERTIFICATE_FOUND = -49

541

X509_FMT_DER = 0

542

NO_TICKETS = 1<<10

543

ENABLE_RAWPK = 1<<18

544

CTYPE_PEERS = 3

545

KEYID_USE_SHA256 = 1 # gnutls/x509.h

546

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

547

548

# Types

549

class session_int(ctypes.Structure):

550

_fields_ = []

551

session_t = ctypes.POINTER(session_int)

552

553

class certificate_credentials_st(ctypes.Structure):

554

_fields_ = []

555

certificate_credentials_t = ctypes.POINTER(

556

certificate_credentials_st)

557

certificate_type_t = ctypes.c_int

558

559

class datum_t(ctypes.Structure):

560

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

561

('size', ctypes.c_uint)]

562

563

class openpgp_crt_int(ctypes.Structure):

564

_fields_ = []

565

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

566

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

567

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

568

credentials_type_t = ctypes.c_int

569

transport_ptr_t = ctypes.c_void_p

570

close_request_t = ctypes.c_int

571

572

# Exceptions

573

class Error(Exception):

574

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

575

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

576

# code is passed, convert it to a string with

577

# gnutls.strerror()

578

self.code = code

579

if message is None and code is not None:

580

message = gnutls.strerror(code)

581

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

582

message, *args)

583

584

class CertificateSecurityError(Error):

585

pass

586

587

# Classes

588

class Credentials:

589

def __init__(self):

590

self._c_object = gnutls.certificate_credentials_t()

591

gnutls.certificate_allocate_credentials(

592

ctypes.byref(self._c_object))

593

self.type = gnutls.CRD_CERTIFICATE

594

595

def __del__(self):

596

gnutls.certificate_free_credentials(self._c_object)

597

598

class ClientSession:

599

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

600

self._c_object = gnutls.session_t()

601

gnutls_flags = gnutls.CLIENT

602

if gnutls.check_version(b"3.5.6"):

603

gnutls_flags |= gnutls.NO_TICKETS

604

if gnutls.has_rawpk:

605

gnutls_flags |= gnutls.ENABLE_RAWPK

606

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

607

del gnutls_flags

608

gnutls.set_default_priority(self._c_object)

609

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

610

gnutls.handshake_set_private_extensions(self._c_object,

611

True)

612

self.socket = socket

613

if credentials is None:

614

credentials = gnutls.Credentials()

615

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

616

ctypes.cast(credentials._c_object,

617

ctypes.c_void_p))

618

self.credentials = credentials

619

620

def __del__(self):

621

gnutls.deinit(self._c_object)

622

623

def handshake(self):

624

return gnutls.handshake(self._c_object)

625

626

def send(self, data):

627

data = bytes(data)

628

data_len = len(data)

629

while data_len > 0:

630

data_len -= gnutls.record_send(self._c_object,

631

data[-data_len:],

632

data_len)

633

634

def bye(self):

635

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

636

637

# Error handling functions

638

def _error_code(result):

639

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

640

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

641

if result >= 0:

642

return result

643

if result == gnutls.E_NO_CERTIFICATE_FOUND:

644

raise gnutls.CertificateSecurityError(code=result)

645

raise gnutls.Error(code=result)

646

647

def _retry_on_error(result, func, arguments):

648

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

649

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

650

while result < 0:

651

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

652

return _error_code(result)

653

result = func(*arguments)

654

return result

655

656

# Unless otherwise indicated, the function declarations below are

657

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

658

659

# Functions

660

priority_set_direct = _library.gnutls_priority_set_direct

661

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

662

ctypes.POINTER(ctypes.c_char_p)]

663

priority_set_direct.restype = _error_code

664

665

init = _library.gnutls_init

666

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

667

init.restype = _error_code

668

669

set_default_priority = _library.gnutls_set_default_priority

670

set_default_priority.argtypes = [session_t]

671

set_default_priority.restype = _error_code

672

673

record_send = _library.gnutls_record_send

674

record_send.argtypes = [session_t, ctypes.c_void_p,

675

ctypes.c_size_t]

676

record_send.restype = ctypes.c_ssize_t

677

record_send.errcheck = _retry_on_error

678

679

certificate_allocate_credentials = (

680

_library.gnutls_certificate_allocate_credentials)

681

certificate_allocate_credentials.argtypes = [

682

ctypes.POINTER(certificate_credentials_t)]

683

certificate_allocate_credentials.restype = _error_code

684

685

certificate_free_credentials = (

686

_library.gnutls_certificate_free_credentials)

687

certificate_free_credentials.argtypes = [

688

certificate_credentials_t]

689

certificate_free_credentials.restype = None

690

691

handshake_set_private_extensions = (

692

_library.gnutls_handshake_set_private_extensions)

693

handshake_set_private_extensions.argtypes = [session_t,

694

ctypes.c_int]

695

handshake_set_private_extensions.restype = None

696

697

credentials_set = _library.gnutls_credentials_set

698

credentials_set.argtypes = [session_t, credentials_type_t,

699

ctypes.c_void_p]

700

credentials_set.restype = _error_code

701

702

strerror = _library.gnutls_strerror

703

strerror.argtypes = [ctypes.c_int]

704

strerror.restype = ctypes.c_char_p

705

706

certificate_type_get = _library.gnutls_certificate_type_get

707

certificate_type_get.argtypes = [session_t]

708

certificate_type_get.restype = _error_code

709

710

certificate_get_peers = _library.gnutls_certificate_get_peers

711

certificate_get_peers.argtypes = [session_t,

712

ctypes.POINTER(ctypes.c_uint)]

713

certificate_get_peers.restype = ctypes.POINTER(datum_t)

714

715

global_set_log_level = _library.gnutls_global_set_log_level

716

global_set_log_level.argtypes = [ctypes.c_int]

717

global_set_log_level.restype = None

718

719

global_set_log_function = _library.gnutls_global_set_log_function

720

global_set_log_function.argtypes = [log_func]

721

global_set_log_function.restype = None

722

723

deinit = _library.gnutls_deinit

724

deinit.argtypes = [session_t]

725

deinit.restype = None

726

727

handshake = _library.gnutls_handshake

728

handshake.argtypes = [session_t]

729

handshake.restype = _error_code

730

handshake.errcheck = _retry_on_error

731

732

transport_set_ptr = _library.gnutls_transport_set_ptr

733

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

734

transport_set_ptr.restype = None

735

736

bye = _library.gnutls_bye

737

bye.argtypes = [session_t, close_request_t]

738

bye.restype = _error_code

739

bye.errcheck = _retry_on_error

740

741

check_version = _library.gnutls_check_version

742

check_version.argtypes = [ctypes.c_char_p]

743

check_version.restype = ctypes.c_char_p

744

745

_need_version = b"3.3.0"

746

if check_version(_need_version) is None:

747

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

748

.format(_need_version))

749

750

_tls_rawpk_version = b"3.6.6"

751

has_rawpk = bool(check_version(_tls_rawpk_version))

752

753

if has_rawpk:

754

# Types

755

class pubkey_st(ctypes.Structure):

756

_fields = []

757

pubkey_t = ctypes.POINTER(pubkey_st)

758

759

x509_crt_fmt_t = ctypes.c_int

760

761

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

762

pubkey_init = _library.gnutls_pubkey_init

763

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

764

pubkey_init.restype = _error_code

765

766

pubkey_import = _library.gnutls_pubkey_import

767

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

768

x509_crt_fmt_t]

769

pubkey_import.restype = _error_code

770

771

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

772

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

773

ctypes.POINTER(ctypes.c_ubyte),

774

ctypes.POINTER(ctypes.c_size_t)]

775

pubkey_get_key_id.restype = _error_code

776

777

pubkey_deinit = _library.gnutls_pubkey_deinit

778

pubkey_deinit.argtypes = [pubkey_t]

779

pubkey_deinit.restype = None

780

else:

781

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

782

783

openpgp_crt_init = _library.gnutls_openpgp_crt_init

784

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

785

openpgp_crt_init.restype = _error_code

786

787

openpgp_crt_import = _library.gnutls_openpgp_crt_import

788

openpgp_crt_import.argtypes = [openpgp_crt_t,

789

ctypes.POINTER(datum_t),

790

openpgp_crt_fmt_t]

791

openpgp_crt_import.restype = _error_code

792

793

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

794

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

795

ctypes.POINTER(ctypes.c_uint)]

796

openpgp_crt_verify_self.restype = _error_code

797

798

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

799

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

800

openpgp_crt_deinit.restype = None

801

802

openpgp_crt_get_fingerprint = (

803

_library.gnutls_openpgp_crt_get_fingerprint)

804

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

805

ctypes.c_void_p,

806

ctypes.POINTER(

807

ctypes.c_size_t)]

808

openpgp_crt_get_fingerprint.restype = _error_code

809

810

if check_version(b"3.6.4"):

811

certificate_type_get2 = _library.gnutls_certificate_type_get2

812

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

813

certificate_type_get2.restype = _error_code

814

815

# Remove non-public functions

816

del _error_code, _retry_on_error

817

818

819

def call_pipe(connection, # : multiprocessing.Connection

820

func, *args, **kwargs):

821

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

822

823

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

824

return value on the provided multiprocessing.Connection.

825

"""

826

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

827

connection.close()

828

829

830

class Client:

395

def timedelta_to_milliseconds(td):

396

"Convert a datetime.timedelta() to milliseconds"

397

return ((td.days * 24 * 60 * 60 * 1000)

398

+ (td.seconds * 1000)

399

+ (td.microseconds // 1000))

400

401

402

class Client(object):

831

403

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

832

404

833

405

Attributes:

834

406

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

835

407

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

836

408

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

837

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

838

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

839

running.

840

checker_callback_tag: a GLib event source tag, or None

409

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

410

to see if the client lives.

411

'None' if no process is running.

412

checker_callback_tag: a gobject event source tag, or None

841

413

checker_command: string; External command which is run to check

842

414

if client lives. %() expansions are done at

843

415

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

844

416

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

845

checker_initiator_tag: a GLib event source tag, or None

417

checker_initiator_tag: a gobject event source tag, or None

846

418

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

847

419

client_structure: Object describing what attributes a client has

848

420

and is used for storing the client at exit

849

421

current_checker_command: string; current running checker_command

850

disable_initiator_tag: a GLib event source tag, or None

422

disable_initiator_tag: a gobject event source tag, or None

851

423

enabled: bool()

852

424

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

853

uniquely identify an OpenPGP client

854

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

855

a client using raw public keys

425

uniquely identify the client

856

426

host: string; available for use by the checker command

857

427

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

858

428

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

860

430

last_checker_status: integer between 0 and 255 reflecting exit

861

431

status of last checker. -1 reflects crashed

862

432

checker, -2 means no checker completed yet.

863

last_checker_signal: The signal which killed the last checker, if

864

last_checker_status is -1

865

433

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

866

434

name: string; from the config file, used in log messages and

867

435

D-Bus identifiers

874

442

disabled, or None

875

443

server_settings: The server_settings dict from main()

876

444

"""

877

445

878

446

runtime_expansions = ("approval_delay", "approval_duration",

879

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

447

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

880

448

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

881

449

"last_approval_request", "last_checked_ok",

882

450

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

883

client_defaults = {

884

"timeout": "PT5M",

885

"extended_timeout": "PT15M",

886

"interval": "PT2M",

887

"checker": "fping -q -- %%(host)s",

888

"host": "",

889

"approval_delay": "PT0S",

890

"approval_duration": "PT1S",

891

"approved_by_default": "True",

892

"enabled": "True",

893

}

894

451

client_defaults = { "timeout": "PT5M",

452

"extended_timeout": "PT15M",

453

"interval": "PT2M",

454

"checker": "fping -q -- %%(host)s",

455

"host": "",

456

"approval_delay": "PT0S",

457

"approval_duration": "PT1S",

458

"approved_by_default": "True",

459

"enabled": "True",

460

}

461

462

def timeout_milliseconds(self):

463

"Return the 'timeout' attribute in milliseconds"

464

return timedelta_to_milliseconds(self.timeout)

465

466

def extended_timeout_milliseconds(self):

467

"Return the 'extended_timeout' attribute in milliseconds"

468

return timedelta_to_milliseconds(self.extended_timeout)

469

470

def interval_milliseconds(self):

471

"Return the 'interval' attribute in milliseconds"

472

return timedelta_to_milliseconds(self.interval)

473

474

def approval_delay_milliseconds(self):

475

return timedelta_to_milliseconds(self.approval_delay)

476

895

477

@staticmethod

896

478

def config_parser(config):

897

479

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

904

486

for client_name in config.sections():

905

487

section = dict(config.items(client_name))

906

488

client = settings[client_name] = {}

907

489

908

490

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

909

491

# Reformat values from string types to Python types

910

492

client["approved_by_default"] = config.getboolean(

911

493

client_name, "approved_by_default")

912

494

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

913

495

"enabled")

914

915

# Uppercase and remove spaces from key_id and fingerprint

916

# for later comparison purposes with return value from the

917

# key_id() and fingerprint() functions

918

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

919

.replace(" ", ""))

496

920

497

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

921

498

.replace(" ", ""))

922

499

if "secret" in section:

923

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

924

.encode("utf-8"),

925

"base64")

500

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

926

501

elif "secfile" in section:

927

502

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

928

503

(section["secfile"])),

929

504

"rb") as secfile:

930

505

client["secret"] = secfile.read()

931

506

else:

932

raise TypeError("No secret or secfile for section {}"

507

raise TypeError("No secret or secfile for section {0}"

933

508

.format(section))

934

509

client["timeout"] = string_to_delta(section["timeout"])

935

510

client["extended_timeout"] = string_to_delta(

943

518

client["last_approval_request"] = None

944

519

client["last_checked_ok"] = None

945

520

client["last_checker_status"] = -2

946

521

947

522

return settings

948

949

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

523

524

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

950

525

self.name = name

951

526

if server_settings is None:

952

527

server_settings = {}

953

528

self.server_settings = server_settings

954

529

# adding all client settings

955

for setting, value in settings.items():

530

for setting, value in settings.iteritems():

956

531

setattr(self, setting, value)

957

532

958

533

if self.enabled:

959

534

if not hasattr(self, "last_enabled"):

960

535

self.last_enabled = datetime.datetime.utcnow()

964

539

else:

965

540

self.last_enabled = None

966

541

self.expires = None

967

542

968

543

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

969

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

544

# Uppercase and remove spaces from fingerprint for later

545

# comparison purposes with return value from the fingerprint()

546

# function

970

547

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

971

548

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

972

549

datetime.datetime.utcnow())

973

550

974

551

# attributes specific for this server instance

975

552

self.checker = None

976

553

self.checker_initiator_tag = None

979

556

self.current_checker_command = None

980

557

self.approved = None

981

558

self.approvals_pending = 0

982

self.changedstate = multiprocessing_manager.Condition(

983

multiprocessing_manager.Lock())

984

self.client_structure = [attr

985

for attr in self.__dict__.keys()

559

self.changedstate = (multiprocessing_manager

560

.Condition(multiprocessing_manager

561

.Lock()))

562

self.client_structure = [attr for attr in

563

self.__dict__.iterkeys()

986

564

if not attr.startswith("_")]

987

565

self.client_structure.append("client_structure")

988

989

for name, t in inspect.getmembers(

990

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

566

567

for name, t in inspect.getmembers(type(self),

568

lambda obj:

569

isinstance(obj,

570

property)):

991

571

if not name.startswith("_"):

992

572

self.client_structure.append(name)

993

573

994

574

# Send notice to process children that client state has changed

995

575

def send_changedstate(self):

996

576

with self.changedstate:

997

577

self.changedstate.notify_all()

998

578

999

579

def enable(self):

1000

580

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

1001

581

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

1006

586

self.last_enabled = datetime.datetime.utcnow()

1007

587

self.init_checker()

1008

588

self.send_changedstate()

1009

589

1010

590

def disable(self, quiet=True):

1011

591

"""Disable this client."""

1012

592

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

1014

594

if not quiet:

1015

595

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

1016

596

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

1017

GLib.source_remove(self.disable_initiator_tag)

597

gobject.source_remove(self.disable_initiator_tag)

1018

598

self.disable_initiator_tag = None

1019

599

self.expires = None

1020

600

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

1021

GLib.source_remove(self.checker_initiator_tag)

601

gobject.source_remove(self.checker_initiator_tag)

1022

602

self.checker_initiator_tag = None

1023

603

self.stop_checker()

1024

604

self.enabled = False

1025

605

if not quiet:

1026

606

self.send_changedstate()

1027

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

607

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

1028

608

return False

1029

609

1030

610

def __del__(self):

1031

611

self.disable()

1032

612

1033

613

def init_checker(self):

1034

614

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

1035

615

# and every interval from then on.

1036

616

if self.checker_initiator_tag is not None:

1037

GLib.source_remove(self.checker_initiator_tag)

1038

self.checker_initiator_tag = GLib.timeout_add(

1039

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

1040

+ 1)),

1041

self.start_checker)

617

gobject.source_remove(self.checker_initiator_tag)

618

self.checker_initiator_tag = (gobject.timeout_add

619

(self.interval_milliseconds(),

620

self.start_checker))

1042

621

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

1043

622

if self.disable_initiator_tag is not None:

1044

GLib.source_remove(self.disable_initiator_tag)

1045

self.disable_initiator_tag = GLib.timeout_add(

1046

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

623

gobject.source_remove(self.disable_initiator_tag)

624

self.disable_initiator_tag = (gobject.timeout_add

625

(self.timeout_milliseconds(),

626

self.disable))

1047

627

# Also start a new checker *right now*.

1048

628

self.start_checker()

1049

1050

def checker_callback(self, source, condition, connection,

1051

command):

629

630

def checker_callback(self, pid, condition, command):

1052

631

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

1053

# Read return code from connection (see call_pipe)

1054

returncode = connection.recv()

1055

connection.close()

1056

if self.checker is not None:

1057

self.checker.join()

1058

632

self.checker_callback_tag = None

1059

633

self.checker = None

1060

1061

if returncode >= 0:

1062

self.last_checker_status = returncode

1063

self.last_checker_signal = None

634

if os.WIFEXITED(condition):

635

self.last_checker_status = os.WEXITSTATUS(condition)

1064

636

if self.last_checker_status == 0:

1065

637

logger.info("Checker for %(name)s succeeded",

1066

638

vars(self))

1067

639

self.checked_ok()

1068

640

else:

1069

logger.info("Checker for %(name)s failed", vars(self))

641

logger.info("Checker for %(name)s failed",

642

vars(self))

1070

643

else:

1071

644

self.last_checker_status = -1

1072

self.last_checker_signal = -returncode

1073

645

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

1074

646

vars(self))

1075

return False

1076

647

1077

648

def checked_ok(self):

1078

649

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

1079

650

self.last_checked_ok = datetime.datetime.utcnow()

1080

651

self.last_checker_status = 0

1081

self.last_checker_signal = None

1082

652

self.bump_timeout()

1083

653

1084

654

def bump_timeout(self, timeout=None):

1085

655

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

1086

656

if timeout is None:

1087

657

timeout = self.timeout

1088

658

if self.disable_initiator_tag is not None:

1089

GLib.source_remove(self.disable_initiator_tag)

659

gobject.source_remove(self.disable_initiator_tag)

1090

660

self.disable_initiator_tag = None

1091

661

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

1092

self.disable_initiator_tag = GLib.timeout_add(

1093

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

662

self.disable_initiator_tag = (gobject.timeout_add

663

(timedelta_to_milliseconds

664

(timeout), self.disable))

1094

665

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

1095

666

1096

667

def need_approval(self):

1097

668

self.last_approval_request = datetime.datetime.utcnow()

1098

669

1099

670

def start_checker(self):

1100

671

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

1101

672

1102

673

If a checker already exists, leave it running and do

1103

674

nothing."""

1104

675

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

1109

680

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

1110

681

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

1111

682

# should be.

1112

1113

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

1114

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

1115

self.checker.join()

1116

self.checker = None

683

684

# If a checker exists, make sure it is not a zombie

685

try:

686

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

687

except (AttributeError, OSError) as error:

688

if (isinstance(error, OSError)

689

and error.errno != errno.ECHILD):

690

raise error

691

else:

692

if pid:

693

logger.warning("Checker was a zombie")

694

gobject.source_remove(self.checker_callback_tag)

695

self.checker_callback(pid, status,

696

self.current_checker_command)

1117

697

# Start a new checker if needed

1118

698

if self.checker is None:

1119

699

# Escape attributes for the shell

1120

escaped_attrs = {

1121

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

1122

for attr in self.runtime_expansions}

700

escaped_attrs = dict(

701

(attr, re.escape(unicode(getattr(self, attr))))

702

for attr in

703

self.runtime_expansions)

1123

704

try:

1124

705

command = self.checker_command % escaped_attrs

1125

706

except TypeError as error:

1126

707

logger.error('Could not format string "%s"',

1127

self.checker_command,

708

self.checker_command, exc_info=error)

709

return True # Try again later

710

self.current_checker_command = command

711

try:

712

logger.info("Starting checker %r for %s",

713

command, self.name)

714

# We don't need to redirect stdout and stderr, since

715

# in normal mode, that is already done by daemon(),

716

# and in debug mode we don't want to. (Stdin is

717

# always replaced by /dev/null.)

718

# The exception is when not debugging but nevertheless

719

# running in the foreground; use the previously

720

# created wnull.

721

popen_args = {}

722

if (not self.server_settings["debug"]

723

and self.server_settings["foreground"]):

724

popen_args.update({"stdout": wnull,

725

"stderr": wnull })

726

self.checker = subprocess.Popen(command,

727

close_fds=True,

728

shell=True, cwd="/",

729

**popen_args)

730

except OSError as error:

731

logger.error("Failed to start subprocess",

1128

732

exc_info=error)

1129

return True # Try again later

1130

self.current_checker_command = command

1131

logger.info("Starting checker %r for %s", command,

1132

self.name)

1133

# We don't need to redirect stdout and stderr, since

1134

# in normal mode, that is already done by daemon(),

1135

# and in debug mode we don't want to. (Stdin is

1136

# always replaced by /dev/null.)

1137

# The exception is when not debugging but nevertheless

1138

# running in the foreground; use the previously

1139

# created wnull.

1140

popen_args = {"close_fds": True,

1141

"shell": True,

1142

"cwd": "/"}

1143

if (not self.server_settings["debug"]

1144

and self.server_settings["foreground"]):

1145

popen_args.update({"stdout": wnull,

1146

"stderr": wnull})

1147

pipe = multiprocessing.Pipe(duplex=False)

1148

self.checker = multiprocessing.Process(

1149

target=call_pipe,

1150

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

1151

kwargs=popen_args)

1152

self.checker.start()

1153

self.checker_callback_tag = GLib.io_add_watch(

1154

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

1155

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1156

self.checker_callback, pipe[0], command)

1157

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

733

return True

734

self.checker_callback_tag = (gobject.child_watch_add

735

(self.checker.pid,

736

self.checker_callback,

737

data=command))

738

# The checker may have completed before the gobject

739

# watch was added. Check for this.

740

try:

741

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

742

except OSError as error:

743

if error.errno == errno.ECHILD:

744

# This should never happen

745

logger.error("Child process vanished",

746

exc_info=error)

747

return True

748

raise

749

if pid:

750

gobject.source_remove(self.checker_callback_tag)

751

self.checker_callback(pid, status, command)

752

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

1158

753

return True

1159

754

1160

755

def stop_checker(self):

1161

756

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

1162

757

if self.checker_callback_tag:

1163

GLib.source_remove(self.checker_callback_tag)

758

gobject.source_remove(self.checker_callback_tag)

1164

759

self.checker_callback_tag = None

1165

760

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

1166

761

return

1167

762

logger.debug("Stopping checker for %(name)s", vars(self))

1168

self.checker.terminate()

763

try:

764

self.checker.terminate()

765

#time.sleep(0.5)

766

#if self.checker.poll() is None:

767

# self.checker.kill()

768

except OSError as error:

769

if error.errno != errno.ESRCH: # No such process

770

raise

1169

771

self.checker = None

1170

772

1171

773

1172

def dbus_service_property(dbus_interface,

1173

signature="v",

1174

access="readwrite",

1175

byte_arrays=False):

774

def dbus_service_property(dbus_interface, signature="v",

775

access="readwrite", byte_arrays=False):

1176

776

"""Decorators for marking methods of a DBusObjectWithProperties to

1177

777

become properties on the D-Bus.

1178

778

1179

779

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

1180

780

and with one argument by "Set".

1181

781

1182

782

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

1183

783

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

1184

784

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

1187

787

# "Set" method, so we fail early here:

1188

788

if byte_arrays and signature != "ay":

1189

789

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

1190

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

1191

790

" signature {0!r}".format(signature))

1192

791

def decorator(func):

1193

792

func._dbus_is_property = True

1194

793

func._dbus_interface = dbus_interface

1197

796

func._dbus_name = func.__name__

1198

797

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

1199

798

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

1200

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

799

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1201

800

return func

1202

1203

801

return decorator

1204

802

1205

803

1206

804

def dbus_interface_annotations(dbus_interface):

1207

805

"""Decorator for marking functions returning interface annotations

1208

806

1209

807

Usage:

1210

808

1211

809

@dbus_interface_annotations("org.example.Interface")

1212

810

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

1213

811

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

1214

812

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

1215

813

"false"}

1216

814

"""

1217

1218

815

def decorator(func):

1219

816

func._dbus_is_interface = True

1220

817

func._dbus_interface = dbus_interface

1221

818

func._dbus_name = dbus_interface

1222

819

return func

1223

1224

820

return decorator

1225

821

1226

822

1227

823

def dbus_annotations(annotations):

1228

824

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

1229

825

Usage:

1230

1231

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

1232

"org.freedesktop.DBus.Property."

1233

"EmitsChangedSignal": "false"})

826

1234

827

@dbus_service_property("org.example.Interface", signature="b",

1235

828

access="r")

829

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

830

"org.freedesktop.DBus.Property."

831

"EmitsChangedSignal": "false"})

1236

832

def Property_dbus_property(self):

1237

833

return dbus.Boolean(False)

1238

1239

See also the DBusObjectWithAnnotations class.

1240

834

"""

1241

1242

835

def decorator(func):

1243

836

func._dbus_annotations = annotations

1244

837

return func

1245

1246

838

return decorator

1247

839

1248

840

1249

841

class DBusPropertyException(dbus.exceptions.DBusException):

1250

842

"""A base class for D-Bus property-related exceptions

1251

843

"""

1252

pass

844

def __unicode__(self):

845

return unicode(str(self))

1253

846

1254

847

1255

848

class DBusPropertyAccessException(DBusPropertyException):

1264

857

pass

1265

858

1266

859

1267

class DBusObjectWithAnnotations(dbus.service.Object):

1268

"""A D-Bus object with annotations.

1269

1270

Classes inheriting from this can use the dbus_annotations

1271

decorator to add annotations to methods or signals.

860

class DBusObjectWithProperties(dbus.service.Object):

861

"""A D-Bus object with properties.

862

863

Classes inheriting from this can use the dbus_service_property

864

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

865

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

1272

866

"""

1273

867

1274

868

@staticmethod

1275

869

def _is_dbus_thing(thing):

1276

870

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

1277

871

1278

872

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

1279

873

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

1280

874

"""

1281

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

875

return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),

1282

876

False)

1283

877

1284

878

def _get_all_dbus_things(self, thing):

1285

879

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

1286

880

"""

1287

return ((getattr(athing.__get__(self), "_dbus_name", name),

881

return ((getattr(athing.__get__(self), "_dbus_name",

882

name),

1288

883

athing.__get__(self))

1289

884

for cls in self.__class__.__mro__

1290

885

for name, athing in

1291

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

1292

1293

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1294

out_signature="s",

1295

path_keyword='object_path',

1296

connection_keyword='connection')

1297

def Introspect(self, object_path, connection):

1298

"""Overloading of standard D-Bus method.

1299

1300

Inserts annotation tags on methods and signals.

1301

"""

1302

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

1303

connection)

1304

try:

1305

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

1306

1307

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

1308

# Add annotation tags

1309

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

1310

for tag in if_tag.getElementsByTagName(typ):

1311

annots = dict()

1312

for name, prop in (self.

1313

_get_all_dbus_things(typ)):

1314

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

1315

and prop._dbus_interface

1316

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

1317

annots.update(getattr(

1318

prop, "_dbus_annotations", {}))

1319

for name, value in annots.items():

1320

ann_tag = document.createElement(

1321

"annotation")

1322

ann_tag.setAttribute("name", name)

1323

ann_tag.setAttribute("value", value)

1324

tag.appendChild(ann_tag)

1325

# Add interface annotation tags

1326

for annotation, value in dict(

1327

itertools.chain.from_iterable(

1328

annotations().items()

1329

for name, annotations

1330

in self._get_all_dbus_things("interface")

1331

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

1332

)).items():

1333

ann_tag = document.createElement("annotation")

1334

ann_tag.setAttribute("name", annotation)

1335

ann_tag.setAttribute("value", value)

1336

if_tag.appendChild(ann_tag)

1337

# Fix argument name for the Introspect method itself

1338

if (if_tag.getAttribute("name")

1339

== dbus.INTROSPECTABLE_IFACE):

1340

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

1341

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

1342

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

1343

if (arg.getAttribute("direction")

1344

== "out"):

1345

arg.setAttribute("name",

1346

"xml_data")

1347

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

1348

document.unlink()

1349

except (AttributeError, xml.dom.DOMException,

1350

xml.parsers.expat.ExpatError) as error:

1351

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

1352

exc_info=error)

1353

return xmlstring

1354

1355

1356

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1357

"""A D-Bus object with properties.

1358

1359

Classes inheriting from this can use the dbus_service_property

1360

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

1361

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

1362

"""

1363

886

inspect.getmembers(cls,

887

self._is_dbus_thing(thing)))

888

1364

889

def _get_dbus_property(self, interface_name, property_name):

1365

890

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

1366

891

property with the specified name and interface.

1367

892

"""

1368

for cls in self.__class__.__mro__:

1369

for name, value in inspect.getmembers(

1370

cls, self._is_dbus_thing("property")):

893

for cls in self.__class__.__mro__:

894

for name, value in (inspect.getmembers

895

(cls,

896

self._is_dbus_thing("property"))):

1371

897

if (value._dbus_name == property_name

1372

898

and value._dbus_interface == interface_name):

1373

899

return value.__get__(self)

1374

900

1375

901

# No such property

1376

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

1377

self.dbus_object_path, interface_name, property_name))

1378

1379

@classmethod

1380

def _get_all_interface_names(cls):

1381

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

1382

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

1383

"_dbus_interface", None)

1384

for x in (inspect.getmro(cls))

1385

for attr in dir(x))

1386

if name is not None)

1387

1388

@dbus.service.method(dbus.PROPERTIES_IFACE,

1389

in_signature="ss",

902

raise DBusPropertyNotFound(self.dbus_object_path + ":"

903

+ interface_name + "."

904

+ property_name)

905

906

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

1390

907

out_signature="v")

1391

908

def Get(self, interface_name, property_name):

1392

909

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

1398

915

if not hasattr(value, "variant_level"):

1399

916

return value

1400

917

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

1401

918

1402

919

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

1403

920

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

1404

921

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

1410

927

# The byte_arrays option is not supported yet on

1411

928

# signatures other than "ay".

1412

929

if prop._dbus_signature != "ay":

1413

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

1414

"'ay' signature {!r}"

1415

.format(prop._dbus_signature))

1416

value = dbus.ByteArray(bytes(value))

930

raise ValueError

931

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

932

for byte in value))

1417

933

prop(value)

1418

1419

@dbus.service.method(dbus.PROPERTIES_IFACE,

1420

in_signature="s",

934

935

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

1421

936

out_signature="a{sv}")

1422

937

def GetAll(self, interface_name):

1423

938

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

1424

939

standard.

1425

940

1426

941

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

1427

942

"""

1428

943

properties = {}

1438

953

if not hasattr(value, "variant_level"):

1439

954

properties[name] = value

1440

955

continue

1441

properties[name] = type(value)(

1442

value, variant_level=value.variant_level + 1)

956

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

957

value.variant_level+1)

1443

958

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

1444

1445

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

1446

def PropertiesChanged(self, interface_name, changed_properties,

1447

invalidated_properties):

1448

"""Standard D-Bus PropertiesChanged() signal, see D-Bus

1449

standard.

1450

"""

1451

pass

1452

959

1453

960

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1454

961

out_signature="s",

1455

962

path_keyword='object_path',

1456

963

connection_keyword='connection')

1457

964

def Introspect(self, object_path, connection):

1458

965

"""Overloading of standard D-Bus method.

1459

966

1460

967

Inserts property tags and interface annotation tags.

1461

968

"""

1462

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1463

object_path,

1464

connection)

969

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

970

connection)

1465

971

try:

1466

972

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

1467

1468

973

def make_tag(document, name, prop):

1469

974

e = document.createElement("property")

1470

975

e.setAttribute("name", name)

1471

976

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

1472

977

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

1473

978

return e

1474

1475

979

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

1476

980

# Add property tags

1477

981

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

1480

984

if prop._dbus_interface

1481

985

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

1482

986

if_tag.appendChild(tag)

1483

# Add annotation tags for properties

1484

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

1485

annots = dict()

1486

for name, prop in self._get_all_dbus_things(

1487

"property"):

1488

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

1489

and prop._dbus_interface

1490

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

1491

annots.update(getattr(

1492

prop, "_dbus_annotations", {}))

1493

for name, value in annots.items():

1494

ann_tag = document.createElement(

1495

"annotation")

1496

ann_tag.setAttribute("name", name)

1497

ann_tag.setAttribute("value", value)

1498

tag.appendChild(ann_tag)

987

# Add annotation tags

988

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

989

for tag in if_tag.getElementsByTagName(typ):

990

annots = dict()

991

for name, prop in (self.

992

_get_all_dbus_things(typ)):

993

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

994

and prop._dbus_interface

995

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

996

annots.update(getattr

997

(prop,

998

"_dbus_annotations",

999

{}))

1000

for name, value in annots.iteritems():

1001

ann_tag = document.createElement(

1002

"annotation")

1003

ann_tag.setAttribute("name", name)

1004

ann_tag.setAttribute("value", value)

1005

tag.appendChild(ann_tag)

1006

# Add interface annotation tags

1007

for annotation, value in dict(

1008

itertools.chain.from_iterable(

1009

annotations().iteritems()

1010

for name, annotations in

1011

self._get_all_dbus_things("interface")

1012

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

1013

)).iteritems():

1014

ann_tag = document.createElement("annotation")

1015

ann_tag.setAttribute("name", annotation)

1016

ann_tag.setAttribute("value", value)

1017

if_tag.appendChild(ann_tag)

1499

1018

# Add the names to the return values for the

1500

1019

# "org.freedesktop.DBus.Properties" methods

1501

1020

if (if_tag.getAttribute("name")

1520

1039

return xmlstring

1521

1040

1522

1041

1523

try:

1524

dbus.OBJECT_MANAGER_IFACE

1525

except AttributeError:

1526

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

1527

1528

1529

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1530

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

1531

1532

Classes inheriting from this exposes the standard

1533

GetManagedObjects call and the InterfacesAdded and

1534

InterfacesRemoved signals on the standard

1535

"org.freedesktop.DBus.ObjectManager" interface.

1536

1537

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

1538

manually.

1539

"""

1540

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1541

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

1542

def GetManagedObjects(self):

1543

"""This function must be overridden"""

1544

raise NotImplementedError()

1545

1546

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1547

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

1548

def InterfacesAdded(self, object_path, interfaces_and_properties):

1549

pass

1550

1551

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

1552

def InterfacesRemoved(self, object_path, interfaces):

1553

pass

1554

1555

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1556

out_signature="s",

1557

path_keyword='object_path',

1558

connection_keyword='connection')

1559

def Introspect(self, object_path, connection):

1560

"""Overloading of standard D-Bus method.

1561

1562

Override return argument name of GetManagedObjects to be

1563

"objpath_interfaces_and_properties"

1564

"""

1565

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1566

object_path,

1567

connection)

1568

try:

1569

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

1570

1571

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

1572

# Fix argument name for the GetManagedObjects method

1573

if (if_tag.getAttribute("name")

1574

== dbus.OBJECT_MANAGER_IFACE):

1575

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

1576

if (cn.getAttribute("name")

1577

== "GetManagedObjects"):

1578

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

1579

if (arg.getAttribute("direction")

1580

== "out"):

1581

arg.setAttribute(

1582

"name",

1583

"objpath_interfaces"

1584

"_and_properties")

1585

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

1586

document.unlink()

1587

except (AttributeError, xml.dom.DOMException,

1588

xml.parsers.expat.ExpatError) as error:

1589

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

1590

exc_info=error)

1591

return xmlstring

1592

1593

1594

1042

def datetime_to_dbus(dt, variant_level=0):

1595

1043

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

1596

1044

if dt is None:

1597

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

1598

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

1045

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

1046

return dbus.String(dt.isoformat(),

1047

variant_level=variant_level)

1599

1048

1600

1049

1601

1050

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1603

1052

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

1604

1053

interface names according to the "alt_interface_names" mapping.

1605

1054

Usage:

1606

1055

1607

1056

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

1608

1057

"net.example.AlternateInterface"})

1609

1058

class SampleDBusObject(dbus.service.Object):

1610

1059

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

1611

1060

def SampleDBusMethod():

1612

1061

pass

1613

1062

1614

1063

The above "SampleDBusMethod" on "SampleDBusObject" will be

1615

1064

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

1616

1065

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

1617

1066

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

1618

1067

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

1619

1068

1620

1069

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

1621

1070

(from DBusObjectWithProperties) and interfaces (from the

1622

1071

dbus_interface_annotations decorator).

1623

1072

"""

1624

1625

1073

def wrapper(cls):

1626

1074

for orig_interface_name, alt_interface_name in (

1627

alt_interface_names.items()):

1075

alt_interface_names.iteritems()):

1628

1076

attr = {}

1629

1077

interface_names = set()

1630

1078

# Go though all attributes of the class

1632

1080

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

1633

1081

# with the wrong interface name

1634

1082

if (not hasattr(attribute, "_dbus_interface")

1635

or not attribute._dbus_interface.startswith(

1636

orig_interface_name)):

1083

or not attribute._dbus_interface

1084

.startswith(orig_interface_name)):

1637

1085

continue

1638

1086

# Create an alternate D-Bus interface name based on

1639

1087

# the current name

1640

alt_interface = attribute._dbus_interface.replace(

1641

orig_interface_name, alt_interface_name)

1088

alt_interface = (attribute._dbus_interface

1089

.replace(orig_interface_name,

1090

alt_interface_name))

1642

1091

interface_names.add(alt_interface)

1643

1092

# Is this a D-Bus signal?

1644

1093

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

1645

1094

# Extract the original non-method undecorated

1646

1095

# function by black magic

1647

if sys.version_info.major == 2:

1648

nonmethod_func = (dict(

1096

nonmethod_func = (dict(

1649

1097

zip(attribute.func_code.co_freevars,

1650

attribute.__closure__))

1651

["func"].cell_contents)

1652

else:

1653

nonmethod_func = (dict(

1654

zip(attribute.__code__.co_freevars,

1655

attribute.__closure__))

1656

["func"].cell_contents)

1098

attribute.__closure__))["func"]

1099

.cell_contents)

1657

1100

# Create a new, but exactly alike, function

1658

1101

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

1659

1102

# with the alternate D-Bus interface name

1660

new_function = copy_function(nonmethod_func)

1661

new_function = (dbus.service.signal(

1662

alt_interface,

1663

attribute._dbus_signature)(new_function))

1103

new_function = (dbus.service.signal

1104

(alt_interface,

1105

attribute._dbus_signature)

1106

(types.FunctionType(

1107

nonmethod_func.func_code,

1108

nonmethod_func.func_globals,

1109

nonmethod_func.func_name,

1110

nonmethod_func.func_defaults,

1111

nonmethod_func.func_closure)))

1664

1112

# Copy annotations, if any

1665

1113

try:

1666

new_function._dbus_annotations = dict(

1667

attribute._dbus_annotations)

1114

new_function._dbus_annotations = (

1115

dict(attribute._dbus_annotations))

1668

1116

except AttributeError:

1669

1117

pass

1670

1671

1118

# Define a creator of a function to call both the

1672

1119

# original and alternate functions, so both the

1673

1120

# original and alternate signals gets sent when

1676

1123

"""This function is a scope container to pass

1677

1124

func1 and func2 to the "call_both" function

1678

1125

outside of its arguments"""

1679

1680

@functools.wraps(func2)

1681

1126

def call_both(*args, **kwargs):

1682

1127

"""This function will emit two D-Bus

1683

1128

signals by calling func1 and func2"""

1684

1129

func1(*args, **kwargs)

1685

1130

func2(*args, **kwargs)

1686

# Make wrapper function look like a D-Bus

1687

# signal

1688

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

1689

if name.startswith("_dbus_"):

1690

setattr(call_both, name, attr)

1691

1692

1131

return call_both

1693

1132

# Create the "call_both" function and add it to

1694

1133

# the class

1699

1138

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

1700

1139

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

1701

1140

# to the class.

1702

attr[attrname] = (

1703

dbus.service.method(

1704

alt_interface,

1705

attribute._dbus_in_signature,

1706

attribute._dbus_out_signature)

1707

(copy_function(attribute)))

1141

attr[attrname] = (dbus.service.method

1142

(alt_interface,

1143

attribute._dbus_in_signature,

1144

attribute._dbus_out_signature)

1145

(types.FunctionType

1146

(attribute.func_code,

1147

attribute.func_globals,

1148

attribute.func_name,

1149

attribute.func_defaults,

1150

attribute.func_closure)))

1708

1151

# Copy annotations, if any

1709

1152

try:

1710

attr[attrname]._dbus_annotations = dict(

1711

attribute._dbus_annotations)

1153

attr[attrname]._dbus_annotations = (

1154

dict(attribute._dbus_annotations))

1712

1155

except AttributeError:

1713

1156

pass

1714

1157

# Is this a D-Bus property?

1717

1160

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

1718

1161

# property with the alternate D-Bus interface

1719

1162

# name. Add it to the class.

1720

attr[attrname] = (dbus_service_property(

1721

alt_interface, attribute._dbus_signature,

1722

attribute._dbus_access,

1723

attribute._dbus_get_args_options

1724

["byte_arrays"])

1725

(copy_function(attribute)))

1163

attr[attrname] = (dbus_service_property

1164

(alt_interface,

1165

attribute._dbus_signature,

1166

attribute._dbus_access,

1167

attribute

1168

._dbus_get_args_options

1169

["byte_arrays"])

1170

(types.FunctionType

1171

(attribute.func_code,

1172

attribute.func_globals,

1173

attribute.func_name,

1174

attribute.func_defaults,

1175

attribute.func_closure)))

1726

1176

# Copy annotations, if any

1727

1177

try:

1728

attr[attrname]._dbus_annotations = dict(

1729

attribute._dbus_annotations)

1178

attr[attrname]._dbus_annotations = (

1179

dict(attribute._dbus_annotations))

1730

1180

except AttributeError:

1731

1181

pass

1732

1182

# Is this a D-Bus interface?

1735

1185

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

1736

1186

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

1737

1187

# to the class.

1738

attr[attrname] = (

1739

dbus_interface_annotations(alt_interface)

1740

(copy_function(attribute)))

1188

attr[attrname] = (dbus_interface_annotations

1189

(alt_interface)

1190

(types.FunctionType

1191

(attribute.func_code,

1192

attribute.func_globals,

1193

attribute.func_name,

1194

attribute.func_defaults,

1195

attribute.func_closure)))

1741

1196

if deprecate:

1742

1197

# Deprecate all alternate interfaces

1743

iname = "_AlternateDBusNames_interface_annotation{}"

1198

iname="_AlternateDBusNames_interface_annotation{0}"

1744

1199

for interface_name in interface_names:

1745

1746

1200

@dbus_interface_annotations(interface_name)

1747

1201

def func(self):

1748

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

1749

"true"}

1202

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

1203

"true" }

1750

1204

# Find an unused name

1751

1205

for aname in (iname.format(i)

1752

1206

for i in itertools.count()):

1756

1210

if interface_names:

1757

1211

# Replace the class with a new subclass of it with

1758

1212

# methods, signals, etc. as created above.

1759

if sys.version_info.major == 2:

1760

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

1761

(cls, ), attr)

1762

else:

1763

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

1764

(cls, ), attr)

1213

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

1214

(cls,), attr)

1765

1215

return cls

1766

1767

1216

return wrapper

1768

1217

1769

1218

1770

1219

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

1771

"se.bsnet.fukt.Mandos"})

1220

"se.bsnet.fukt.Mandos"})

1772

1221

class ClientDBus(Client, DBusObjectWithProperties):

1773

1222

"""A Client class using D-Bus

1774

1223

1775

1224

Attributes:

1776

1225

dbus_object_path: dbus.ObjectPath

1777

1226

bus: dbus.SystemBus()

1778

1227

"""

1779

1228

1780

1229

runtime_expansions = (Client.runtime_expansions

1781

+ ("dbus_object_path", ))

1782

1783

_interface = "se.recompile.Mandos.Client"

1784

1230

+ ("dbus_object_path",))

1231

1785

1232

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

1786

1787

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

1233

1234

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

1788

1235

self.bus = bus

1789

1236

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

1790

1237

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

1791

1238

# the D-Bus

1792

client_object_name = str(self.name).translate(

1239

client_object_name = unicode(self.name).translate(

1793

1240

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

1794

1241

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

1795

self.dbus_object_path = dbus.ObjectPath(

1796

"/clients/" + client_object_name)

1242

self.dbus_object_path = (dbus.ObjectPath

1243

("/clients/" + client_object_name))

1797

1244

DBusObjectWithProperties.__init__(self, self.bus,

1798

1245

self.dbus_object_path)

1799

1800

def notifychangeproperty(transform_func, dbus_name,

1801

type_func=lambda x: x,

1802

variant_level=1,

1803

invalidate_only=False,

1804

_interface=_interface):

1246

1247

def notifychangeproperty(transform_func,

1248

dbus_name, type_func=lambda x: x,

1249

variant_level=1):

1805

1250

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

1806

1251

its changes to DBus.

1807

1252

1808

1253

transform_fun: Function that takes a value and a variant_level

1809

1254

and transforms it to a D-Bus type.

1810

1255

dbus_name: D-Bus name of the variable

1812

1257

to the D-Bus. Default: no transform

1813

1258

variant_level: D-Bus variant level. Default: 1

1814

1259

"""

1815

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

1816

1260

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

1817

1261

def setter(self, value):

1818

1262

if hasattr(self, "dbus_object_path"):

1819

1263

if (not hasattr(self, attrname) or

1820

1264

type_func(getattr(self, attrname, None))

1821

1265

!= type_func(value)):

1822

if invalidate_only:

1823

self.PropertiesChanged(

1824

_interface, dbus.Dictionary(),

1825

dbus.Array((dbus_name, )))

1826

else:

1827

dbus_value = transform_func(

1828

type_func(value),

1829

variant_level=variant_level)

1830

self.PropertyChanged(dbus.String(dbus_name),

1831

dbus_value)

1832

self.PropertiesChanged(

1833

_interface,

1834

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

1835

dbus_value}),

1836

dbus.Array())

1266

dbus_value = transform_func(type_func(value),

1267

variant_level

1268

=variant_level)

1269

self.PropertyChanged(dbus.String(dbus_name),

1270

dbus_value)

1837

1271

setattr(self, attrname, value)

1838

1272

1839

1273

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

1840

1274

1841

1275

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1842

1276

approvals_pending = notifychangeproperty(dbus.Boolean,

1843

1277

"ApprovalPending",

1844

type_func=bool)

1278

type_func = bool)

1845

1279

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

1846

1280

last_enabled = notifychangeproperty(datetime_to_dbus,

1847

1281

"LastEnabled")

1848

checker = notifychangeproperty(

1849

dbus.Boolean, "CheckerRunning",

1850

type_func=lambda checker: checker is not None)

1282

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

1283

type_func = lambda checker:

1284

checker is not None)

1851

1285

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1852

1286

"LastCheckedOK")

1853

1287

last_checker_status = notifychangeproperty(dbus.Int16,

1856

1290

datetime_to_dbus, "LastApprovalRequest")

1857

1291

approved_by_default = notifychangeproperty(dbus.Boolean,

1858

1292

"ApprovedByDefault")

1859

approval_delay = notifychangeproperty(

1860

dbus.UInt64, "ApprovalDelay",

1861

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

1293

approval_delay = notifychangeproperty(dbus.UInt64,

1294

"ApprovalDelay",

1295

type_func =

1296

timedelta_to_milliseconds)

1862

1297

approval_duration = notifychangeproperty(

1863

1298

dbus.UInt64, "ApprovalDuration",

1864

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

1299

type_func = timedelta_to_milliseconds)

1865

1300

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

1866

timeout = notifychangeproperty(

1867

dbus.UInt64, "Timeout",

1868

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

1301

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

1302

type_func =

1303

timedelta_to_milliseconds)

1869

1304

extended_timeout = notifychangeproperty(

1870

1305

dbus.UInt64, "ExtendedTimeout",

1871

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

1872

interval = notifychangeproperty(

1873

dbus.UInt64, "Interval",

1874

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

1306

type_func = timedelta_to_milliseconds)

1307

interval = notifychangeproperty(dbus.UInt64,

1308

"Interval",

1309

type_func =

1310

timedelta_to_milliseconds)

1875

1311

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

1876

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

1877

invalidate_only=True)

1878

1312

1879

1313

del notifychangeproperty

1880

1314

1881

1315

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

1882

1316

try:

1883

1317

self.remove_from_connection()

1886

1320

if hasattr(DBusObjectWithProperties, "__del__"):

1887

1321

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

1888

1322

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

1889

1890

def checker_callback(self, source, condition,

1891

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

1892

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

1893

connection, command, *args,

1894

**kwargs)

1895

exitstatus = self.last_checker_status

1896

if exitstatus >= 0:

1323

1324

def checker_callback(self, pid, condition, command,

1325

*args, **kwargs):

1326

self.checker_callback_tag = None

1327

self.checker = None

1328

if os.WIFEXITED(condition):

1329

exitstatus = os.WEXITSTATUS(condition)

1897

1330

# Emit D-Bus signal

1898

1331

self.CheckerCompleted(dbus.Int16(exitstatus),

1899

# This is specific to GNU libC

1900

dbus.Int64(exitstatus << 8),

1332

dbus.Int64(condition),

1901

1333

dbus.String(command))

1902

1334

else:

1903

1335

# Emit D-Bus signal

1904

1336

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

1905

dbus.Int64(

1906

# This is specific to GNU libC

1907

(exitstatus << 8)

1908

| self.last_checker_signal),

1337

dbus.Int64(condition),

1909

1338

dbus.String(command))

1910

return ret

1911

1339

1340

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

1341

*args, **kwargs)

1342

1912

1343

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

1913

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

1344

old_checker = self.checker

1345

if self.checker is not None:

1346

old_checker_pid = self.checker.pid

1347

else:

1348

old_checker_pid = None

1914

1349

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

1915

1350

# Only if new checker process was started

1916

1351

if (self.checker is not None

1918

1353

# Emit D-Bus signal

1919

1354

self.CheckerStarted(self.current_checker_command)

1920

1355

return r

1921

1356

1922

1357

def _reset_approved(self):

1923

1358

self.approved = None

1924

1359

return False

1925

1360

1926

1361

def approve(self, value=True):

1927

1362

self.approved = value

1928

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

1929

* 1000), self._reset_approved)

1363

gobject.timeout_add(timedelta_to_milliseconds

1364

(self.approval_duration),

1365

self._reset_approved)

1930

1366

self.send_changedstate()

1931

1932

# D-Bus methods, signals & properties

1933

1934

# Interfaces

1935

1936

# Signals

1937

1367

1368

## D-Bus methods, signals & properties

1369

_interface = "se.recompile.Mandos.Client"

1370

1371

## Interfaces

1372

1373

@dbus_interface_annotations(_interface)

1374

def _foo(self):

1375

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

1376

"false"}

1377

1378

## Signals

1379

1938

1380

# CheckerCompleted - signal

1939

1381

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

1940

1382

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

1941

1383

"D-Bus signal"

1942

1384

pass

1943

1385

1944

1386

# CheckerStarted - signal

1945

1387

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

1946

1388

def CheckerStarted(self, command):

1947

1389

"D-Bus signal"

1948

1390

pass

1949

1391

1950

1392

# PropertyChanged - signal

1951

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

1952

1393

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

1953

1394

def PropertyChanged(self, property, value):

1954

1395

"D-Bus signal"

1955

1396

pass

1956

1397

1957

1398

# GotSecret - signal

1958

1399

@dbus.service.signal(_interface)

1959

1400

def GotSecret(self):

1962

1403

server to mandos-client

1963

1404

"""

1964

1405

pass

1965

1406

1966

1407

# Rejected - signal

1967

1408

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

1968

1409

def Rejected(self, reason):

1969

1410

"D-Bus signal"

1970

1411

pass

1971

1412

1972

1413

# NeedApproval - signal

1973

1414

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

1974

1415

def NeedApproval(self, timeout, default):

1975

1416

"D-Bus signal"

1976

1417

return self.need_approval()

1977

1978

# Methods

1979

1418

1419

## Methods

1420

1980

1421

# Approve - method

1981

1422

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

1982

1423

def Approve(self, value):

1983

1424

self.approve(value)

1984

1425

1985

1426

# CheckedOK - method

1986

1427

@dbus.service.method(_interface)

1987

1428

def CheckedOK(self):

1988

1429

self.checked_ok()

1989

1430

1990

1431

# Enable - method

1991

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

1992

1432

@dbus.service.method(_interface)

1993

1433

def Enable(self):

1994

1434

"D-Bus method"

1995

1435

self.enable()

1996

1436

1997

1437

# StartChecker - method

1998

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

1999

1438

@dbus.service.method(_interface)

2000

1439

def StartChecker(self):

2001

1440

"D-Bus method"

2002

1441

self.start_checker()

2003

1442

2004

1443

# Disable - method

2005

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

2006

1444

@dbus.service.method(_interface)

2007

1445

def Disable(self):

2008

1446

"D-Bus method"

2009

1447

self.disable()

2010

1448

2011

1449

# StopChecker - method

2012

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

2013

1450

@dbus.service.method(_interface)

2014

1451

def StopChecker(self):

2015

1452

self.stop_checker()

2016

2017

# Properties

2018

1453

1454

## Properties

1455

2019

1456

# ApprovalPending - property

2020

1457

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

2021

1458

def ApprovalPending_dbus_property(self):

2022

1459

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

2023

1460

2024

1461

# ApprovedByDefault - property

2025

@dbus_service_property(_interface,

2026

signature="b",

1462

@dbus_service_property(_interface, signature="b",

2027

1463

access="readwrite")

2028

1464

def ApprovedByDefault_dbus_property(self, value=None):

2029

1465

if value is None: # get

2030

1466

return dbus.Boolean(self.approved_by_default)

2031

1467

self.approved_by_default = bool(value)

2032

1468

2033

1469

# ApprovalDelay - property

2034

@dbus_service_property(_interface,

2035

signature="t",

1470

@dbus_service_property(_interface, signature="t",

2036

1471

access="readwrite")

2037

1472

def ApprovalDelay_dbus_property(self, value=None):

2038

1473

if value is None: # get

2039

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

2040

* 1000)

1474

return dbus.UInt64(self.approval_delay_milliseconds())

2041

1475

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

2042

1476

2043

1477

# ApprovalDuration - property

2044

@dbus_service_property(_interface,

2045

signature="t",

1478

@dbus_service_property(_interface, signature="t",

2046

1479

access="readwrite")

2047

1480

def ApprovalDuration_dbus_property(self, value=None):

2048

1481

if value is None: # get

2049

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

2050

* 1000)

1482

return dbus.UInt64(timedelta_to_milliseconds(

1483

self.approval_duration))

2051

1484

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

2052

1485

2053

1486

# Name - property

2054

@dbus_annotations(

2055

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

2056

1487

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

2057

1488

def Name_dbus_property(self):

2058

1489

return dbus.String(self.name)

2059

2060

# KeyID - property

2061

@dbus_annotations(

2062

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

2063

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

2064

def KeyID_dbus_property(self):

2065

return dbus.String(self.key_id)

2066

1490

2067

1491

# Fingerprint - property

2068

@dbus_annotations(

2069

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

2070

1492

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

2071

1493

def Fingerprint_dbus_property(self):

2072

1494

return dbus.String(self.fingerprint)

2073

1495

2074

1496

# Host - property

2075

@dbus_service_property(_interface,

2076

signature="s",

1497

@dbus_service_property(_interface, signature="s",

2077

1498

access="readwrite")

2078

1499

def Host_dbus_property(self, value=None):

2079

1500

if value is None: # get

2080

1501

return dbus.String(self.host)

2081

self.host = str(value)

2082

1502

self.host = unicode(value)

1503

2083

1504

# Created - property

2084

@dbus_annotations(

2085

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

2086

1505

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

2087

1506

def Created_dbus_property(self):

2088

1507

return datetime_to_dbus(self.created)

2089

1508

2090

1509

# LastEnabled - property

2091

1510

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

2092

1511

def LastEnabled_dbus_property(self):

2093

1512

return datetime_to_dbus(self.last_enabled)

2094

1513

2095

1514

# Enabled - property

2096

@dbus_service_property(_interface,

2097

signature="b",

1515

@dbus_service_property(_interface, signature="b",

2098

1516

access="readwrite")

2099

1517

def Enabled_dbus_property(self, value=None):

2100

1518

if value is None: # get

2103

1521

self.enable()

2104

1522

else:

2105

1523

self.disable()

2106

1524

2107

1525

# LastCheckedOK - property

2108

@dbus_service_property(_interface,

2109

signature="s",

1526

@dbus_service_property(_interface, signature="s",

2110

1527

access="readwrite")

2111

1528

def LastCheckedOK_dbus_property(self, value=None):

2112

1529

if value is not None:

2113

1530

self.checked_ok()

2114

1531

return

2115

1532

return datetime_to_dbus(self.last_checked_ok)

2116

1533

2117

1534

# LastCheckerStatus - property

2118

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

1535

@dbus_service_property(_interface, signature="n",

1536

access="read")

2119

1537

def LastCheckerStatus_dbus_property(self):

2120

1538

return dbus.Int16(self.last_checker_status)

2121

1539

2122

1540

# Expires - property

2123

1541

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

2124

1542

def Expires_dbus_property(self):

2125

1543

return datetime_to_dbus(self.expires)

2126

1544

2127

1545

# LastApprovalRequest - property

2128

1546

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

2129

1547

def LastApprovalRequest_dbus_property(self):

2130

1548

return datetime_to_dbus(self.last_approval_request)

2131

1549

2132

1550

# Timeout - property

2133

@dbus_service_property(_interface,

2134

signature="t",

1551

@dbus_service_property(_interface, signature="t",

2135

1552

access="readwrite")

2136

1553

def Timeout_dbus_property(self, value=None):

2137

1554

if value is None: # get

2138

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

1555

return dbus.UInt64(self.timeout_milliseconds())

2139

1556

old_timeout = self.timeout

2140

1557

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

2141

1558

# Reschedule disabling

2149

1566

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

2150

1567

is None):

2151

1568

return

2152

GLib.source_remove(self.disable_initiator_tag)

2153

self.disable_initiator_tag = GLib.timeout_add(

2154

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

2155

self.disable)

2156

1569

gobject.source_remove(self.disable_initiator_tag)

1570

self.disable_initiator_tag = (

1571

gobject.timeout_add(

1572

timedelta_to_milliseconds(self.expires - now),

1573

self.disable))

1574

2157

1575

# ExtendedTimeout - property

2158

@dbus_service_property(_interface,

2159

signature="t",

1576

@dbus_service_property(_interface, signature="t",

2160

1577

access="readwrite")

2161

1578

def ExtendedTimeout_dbus_property(self, value=None):

2162

1579

if value is None: # get

2163

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

2164

* 1000)

1580

return dbus.UInt64(self.extended_timeout_milliseconds())

2165

1581

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

2166

1582

2167

1583

# Interval - property

2168

@dbus_service_property(_interface,

2169

signature="t",

1584

@dbus_service_property(_interface, signature="t",

2170

1585

access="readwrite")

2171

1586

def Interval_dbus_property(self, value=None):

2172

1587

if value is None: # get

2173

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

1588

return dbus.UInt64(self.interval_milliseconds())

2174

1589

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

2175

1590

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

2176

1591

return

2177

1592

if self.enabled:

2178

1593

# Reschedule checker run

2179

GLib.source_remove(self.checker_initiator_tag)

2180

self.checker_initiator_tag = GLib.timeout_add(

2181

value, self.start_checker)

2182

self.start_checker() # Start one now, too

2183

1594

gobject.source_remove(self.checker_initiator_tag)

1595

self.checker_initiator_tag = (gobject.timeout_add

1596

(value, self.start_checker))

1597

self.start_checker() # Start one now, too

1598

2184

1599

# Checker - property

2185

@dbus_service_property(_interface,

2186

signature="s",

1600

@dbus_service_property(_interface, signature="s",

2187

1601

access="readwrite")

2188

1602

def Checker_dbus_property(self, value=None):

2189

1603

if value is None: # get

2190

1604

return dbus.String(self.checker_command)

2191

self.checker_command = str(value)

2192

1605

self.checker_command = unicode(value)

1606

2193

1607

# CheckerRunning - property

2194

@dbus_service_property(_interface,

2195

signature="b",

1608

@dbus_service_property(_interface, signature="b",

2196

1609

access="readwrite")

2197

1610

def CheckerRunning_dbus_property(self, value=None):

2198

1611

if value is None: # get

2201

1614

self.start_checker()

2202

1615

else:

2203

1616

self.stop_checker()

2204

1617

2205

1618

# ObjectPath - property

2206

@dbus_annotations(

2207

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

2208

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

2209

1619

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

2210

1620

def ObjectPath_dbus_property(self):

2211

return self.dbus_object_path # is already a dbus.ObjectPath

2212

1621

return self.dbus_object_path # is already a dbus.ObjectPath

1622

2213

1623

# Secret = property

2214

@dbus_annotations(

2215

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

2216

"invalidates"})

2217

@dbus_service_property(_interface,

2218

signature="ay",

2219

access="write",

2220

byte_arrays=True)

1624

@dbus_service_property(_interface, signature="ay",

1625

access="write", byte_arrays=True)

2221

1626

def Secret_dbus_property(self, value):

2222

self.secret = bytes(value)

2223

1627

self.secret = str(value)

1628

2224

1629

del _interface

2225

1630

2226

1631

2227

class ProxyClient:

2228

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

1632

class ProxyClient(object):

1633

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

2229

1634

self._pipe = child_pipe

2230

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

1635

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

2231

1636

if not self._pipe.recv():

2232

raise KeyError(key_id or fpr)

2233

1637

raise KeyError()

1638

2234

1639

def __getattribute__(self, name):

2235

1640

if name == '_pipe':

2236

1641

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

2239

1644

if data[0] == 'data':

2240

1645

return data[1]

2241

1646

if data[0] == 'function':

2242

2243

1647

def func(*args, **kwargs):

2244

1648

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

2245

1649

return self._pipe.recv()[1]

2246

2247

1650

return func

2248

1651

2249

1652

def __setattr__(self, name, value):

2250

1653

if name == '_pipe':

2251

1654

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

2254

1657

2255

1658

class ClientHandler(socketserver.BaseRequestHandler, object):

2256

1659

"""A class to handle client connections.

2257

1660

2258

1661

Instantiated once for each connection to handle it.

2259

1662

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

2260

1663

2261

1664

def handle(self):

2262

1665

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

2263

1666

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

2264

str(self.client_address))

1667

unicode(self.client_address))

2265

1668

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

2266

1669

self.server.child_pipe.fileno())

2267

2268

session = gnutls.ClientSession(self.request)

2269

2270

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

2271

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

2272

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

2273

# "+DHE-DSS"))

1670

1671

session = (gnutls.connection

1672

.ClientSession(self.request,

1673

gnutls.connection

1674

.X509Credentials()))

1675

1676

# Note: gnutls.connection.X509Credentials is really a

1677

# generic GnuTLS certificate credentials object so long as

1678

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

1679

# here despite using OpenPGP certificates.

1680

1681

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

1682

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

1683

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

1684

# "+DHE-DSS"))

2274

1685

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

2275

1686

priority = self.server.gnutls_priority

2276

1687

if priority is None:

2277

1688

priority = "NORMAL"

2278

gnutls.priority_set_direct(session._c_object,

2279

priority.encode("utf-8"),

2280

None)

2281

1689

(gnutls.library.functions

1690

.gnutls_priority_set_direct(session._c_object,

1691

priority, None))

1692

2282

1693

# Start communication using the Mandos protocol

2283

1694

# Get protocol number

2284

1695

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

2285

1696

logger.debug("Protocol version: %r", line)

2286

1697

try:

2287

1698

if int(line.strip().split()[0]) > 1:

2288

raise RuntimeError(line)

1699

raise RuntimeError

2289

1700

except (ValueError, IndexError, RuntimeError) as error:

2290

1701

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

2291

1702

return

2292

1703

2293

1704

# Start GnuTLS connection

2294

1705

try:

2295

1706

session.handshake()

2296

except gnutls.Error as error:

1707

except gnutls.errors.GNUTLSError as error:

2297

1708

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

2298

1709

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

2299

1710

# established. Just abandon the request.

2300

1711

return

2301

1712

logger.debug("Handshake succeeded")

2302

1713

2303

1714

approval_required = False

2304

1715

try:

2305

if gnutls.has_rawpk:

2306

fpr = b""

2307

try:

2308

key_id = self.key_id(

2309

self.peer_certificate(session))

2310

except (TypeError, gnutls.Error) as error:

2311

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

2312

return

2313

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

2314

2315

else:

2316

key_id = b""

2317

try:

2318

fpr = self.fingerprint(

2319

self.peer_certificate(session))

2320

except (TypeError, gnutls.Error) as error:

2321

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

2322

return

2323

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

2324

2325

try:

2326

client = ProxyClient(child_pipe, key_id, fpr,

1716

try:

1717

fpr = self.fingerprint(self.peer_certificate

1718

(session))

1719

except (TypeError,

1720

gnutls.errors.GNUTLSError) as error:

1721

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

1722

return

1723

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

1724

1725

try:

1726

client = ProxyClient(child_pipe, fpr,

2327

1727

self.client_address)

2328

1728

except KeyError:

2329

1729

return

2330

1730

2331

1731

if client.approval_delay:

2332

1732

delay = client.approval_delay

2333

1733

client.approvals_pending += 1

2334

1734

approval_required = True

2335

1735

2336

1736

while True:

2337

1737

if not client.enabled:

2338

1738

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

2339

client.name)

1739

client.name)

2340

1740

if self.server.use_dbus:

2341

1741

# Emit D-Bus signal

2342

1742

client.Rejected("Disabled")

2343

1743

return

2344

1744

2345

1745

if client.approved or not client.approval_delay:

2346

# We are approved or approval is disabled

1746

#We are approved or approval is disabled

2347

1747

break

2348

1748

elif client.approved is None:

2349

1749

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

2351

1751

if self.server.use_dbus:

2352

1752

# Emit D-Bus signal

2353

1753

client.NeedApproval(

2354

client.approval_delay.total_seconds()

2355

* 1000, client.approved_by_default)

1754

client.approval_delay_milliseconds(),

1755

client.approved_by_default)

2356

1756

else:

2357

1757

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

2358

1758

client.name)

2360

1760

# Emit D-Bus signal

2361

1761

client.Rejected("Denied")

2362

1762

return

2363

2364

# wait until timeout or approved

1763

1764

#wait until timeout or approved

2365

1765

time = datetime.datetime.now()

2366

1766

client.changedstate.acquire()

2367

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

1767

client.changedstate.wait(

1768

float(timedelta_to_milliseconds(delay)

1769

/ 1000))

2368

1770

client.changedstate.release()

2369

1771

time2 = datetime.datetime.now()

2370

1772

if (time2 - time) >= delay:

2380

1782

break

2381

1783

else:

2382

1784

delay -= time2 - time

2383

2384

try:

2385

session.send(client.secret)

2386

except gnutls.Error as error:

2387

logger.warning("gnutls send failed",

2388

exc_info=error)

2389

return

2390

1785

1786

sent_size = 0

1787

while sent_size < len(client.secret):

1788

try:

1789

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

1790

except gnutls.errors.GNUTLSError as error:

1791

logger.warning("gnutls send failed",

1792

exc_info=error)

1793

return

1794

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

1795

sent, len(client.secret)

1796

- (sent_size + sent))

1797

sent_size += sent

1798

2391

1799

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

2392

1800

# bump the timeout using extended_timeout

2393

1801

client.bump_timeout(client.extended_timeout)

2394

1802

if self.server.use_dbus:

2395

1803

# Emit D-Bus signal

2396

1804

client.GotSecret()

2397

1805

2398

1806

finally:

2399

1807

if approval_required:

2400

1808

client.approvals_pending -= 1

2401

1809

try:

2402

1810

session.bye()

2403

except gnutls.Error as error:

1811

except gnutls.errors.GNUTLSError as error:

2404

1812

logger.warning("GnuTLS bye failed",

2405

1813

exc_info=error)

2406

1814

2407

1815

@staticmethod

2408

1816

def peer_certificate(session):

2409

"Return the peer's certificate as a bytestring"

2410

try:

2411

cert_type = gnutls.certificate_type_get2(session._c_object,

2412

gnutls.CTYPE_PEERS)

2413

except AttributeError:

2414

cert_type = gnutls.certificate_type_get(session._c_object)

2415

if gnutls.has_rawpk:

2416

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2417

else:

2418

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2419

# If not a valid certificate type...

2420

if cert_type not in valid_cert_types:

2421

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

2422

valid_cert_types)

2423

# ...return invalid data

2424

return b""

1817

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

1818

# If not an OpenPGP certificate...

1819

if (gnutls.library.functions

1820

.gnutls_certificate_type_get(session._c_object)

1821

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1822

# ...do the normal thing

1823

return session.peer_certificate

2425

1824

list_size = ctypes.c_uint(1)

2426

cert_list = (gnutls.certificate_get_peers

1825

cert_list = (gnutls.library.functions

1826

.gnutls_certificate_get_peers

2427

1827

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

2428

1828

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

2429

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

1829

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

1830

" certificate")

2430

1831

if list_size.value == 0:

2431

1832

return None

2432

1833

cert = cert_list[0]

2433

1834

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

2434

2435

@staticmethod

2436

def key_id(certificate):

2437

"Convert a certificate bytestring to a hexdigit key ID"

2438

# New GnuTLS "datum" with the public key

2439

datum = gnutls.datum_t(

2440

ctypes.cast(ctypes.c_char_p(certificate),

2441

ctypes.POINTER(ctypes.c_ubyte)),

2442

ctypes.c_uint(len(certificate)))

2443

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

2444

# New empty GnuTLS certificate

2445

pubkey = gnutls.pubkey_t()

2446

gnutls.pubkey_init(ctypes.byref(pubkey))

2447

# Import the raw public key into the certificate

2448

gnutls.pubkey_import(pubkey,

2449

ctypes.byref(datum),

2450

gnutls.X509_FMT_DER)

2451

# New buffer for the key ID

2452

buf = ctypes.create_string_buffer(32)

2453

buf_len = ctypes.c_size_t(len(buf))

2454

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

2455

gnutls.pubkey_get_key_id(pubkey,

2456

gnutls.KEYID_USE_SHA256,

2457

ctypes.cast(ctypes.byref(buf),

2458

ctypes.POINTER(ctypes.c_ubyte)),

2459

ctypes.byref(buf_len))

2460

# Deinit the certificate

2461

gnutls.pubkey_deinit(pubkey)

2462

2463

# Convert the buffer to a Python bytestring

2464

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

2465

# Convert the bytestring to hexadecimal notation

2466

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

2467

return hex_key_id

2468

1835

2469

1836

@staticmethod

2470

1837

def fingerprint(openpgp):

2471

1838

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2472

1839

# New GnuTLS "datum" with the OpenPGP public key

2473

datum = gnutls.datum_t(

2474

ctypes.cast(ctypes.c_char_p(openpgp),

2475

ctypes.POINTER(ctypes.c_ubyte)),

2476

ctypes.c_uint(len(openpgp)))

1840

datum = (gnutls.library.types

1841

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

1842

ctypes.POINTER

1843

(ctypes.c_ubyte)),

1844

ctypes.c_uint(len(openpgp))))

2477

1845

# New empty GnuTLS certificate

2478

crt = gnutls.openpgp_crt_t()

2479

gnutls.openpgp_crt_init(ctypes.byref(crt))

1846

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1847

(gnutls.library.functions

1848

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2480

1849

# Import the OpenPGP public key into the certificate

2481

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

2482

gnutls.OPENPGP_FMT_RAW)

1850

(gnutls.library.functions

1851

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

1852

gnutls.library.constants

1853

.GNUTLS_OPENPGP_FMT_RAW))

2483

1854

# Verify the self signature in the key

2484

1855

crtverify = ctypes.c_uint()

2485

gnutls.openpgp_crt_verify_self(crt, 0,

2486

ctypes.byref(crtverify))

1856

(gnutls.library.functions

1857

.gnutls_openpgp_crt_verify_self(crt, 0,

1858

ctypes.byref(crtverify)))

2487

1859

if crtverify.value != 0:

2488

gnutls.openpgp_crt_deinit(crt)

2489

raise gnutls.CertificateSecurityError(code

2490

=crtverify.value)

1860

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1861

raise (gnutls.errors.CertificateSecurityError

1862

("Verify failed"))

2491

1863

# New buffer for the fingerprint

2492

1864

buf = ctypes.create_string_buffer(20)

2493

1865

buf_len = ctypes.c_size_t()

2494

1866

# Get the fingerprint from the certificate into the buffer

2495

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

2496

ctypes.byref(buf_len))

1867

(gnutls.library.functions

1868

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

1869

ctypes.byref(buf_len)))

2497

1870

# Deinit the certificate

2498

gnutls.openpgp_crt_deinit(crt)

1871

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2499

1872

# Convert the buffer to a Python bytestring

2500

1873

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

2501

1874

# Convert the bytestring to hexadecimal notation

2503

1876

return hex_fpr

2504

1877

2505

1878

2506

class MultiprocessingMixIn:

1879

class MultiprocessingMixIn(object):

2507

1880

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

2508

2509

1881

def sub_process_main(self, request, address):

2510

1882

try:

2511

1883

self.finish_request(request, address)

2512

1884

except Exception:

2513

1885

self.handle_error(request, address)

2514

1886

self.close_request(request)

2515

1887

2516

1888

def process_request(self, request, address):

2517

1889

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

2518

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

2519

args=(request, address))

1890

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

1891

args = (request, address))

2520

1892

proc.start()

2521

1893

return proc

2522

1894

2523

1895

2524

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1896

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2525

1897

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

2526

2527

1898

def process_request(self, request, client_address):

2528

1899

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

2529

1900

2530

1901

This function creates a new pipe in self.pipe

2531

1902

"""

2532

1903

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2533

1904

2534

1905

proc = MultiprocessingMixIn.process_request(self, request,

2535

1906

client_address)

2536

1907

self.child_pipe.close()

2537

1908

self.add_pipe(parent_pipe, proc)

2538

1909

2539

1910

def add_pipe(self, parent_pipe, proc):

2540

1911

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

2541

raise NotImplementedError()

1912

raise NotImplementedError

2542

1913

2543

1914

2544

1915

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2545

socketserver.TCPServer):

1916

socketserver.TCPServer, object):

2546

1917

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

2547

1918

2548

1919

Attributes:

2549

1920

enabled: Boolean; whether this server is activated yet

2550

1921

interface: None or a network interface name (string)

2551

1922

use_ipv6: Boolean; to use IPv6 or not

2552

1923

"""

2553

2554

1924

def __init__(self, server_address, RequestHandlerClass,

2555

interface=None,

2556

use_ipv6=True,

2557

socketfd=None):

1925

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

2558

1926

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

2559

1927

creating a new one with socket.socket().

2560

1928

"""

2566

1934

self.socketfd = socketfd

2567

1935

# Save the original socket.socket() function

2568

1936

self.socket_socket = socket.socket

2569

2570

1937

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

2571

#

1938

#

2572

1939

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

2573

1940

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

2574

1941

# patching socket.socket.)

2575

#

1942

#

2576

1943

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

2577

1944

@functools.wraps(socket.socket)

2578

1945

def socket_wrapper(*args, **kwargs):

2590

1957

# socket_wrapper(), if socketfd was set.

2591

1958

socketserver.TCPServer.__init__(self, server_address,

2592

1959

RequestHandlerClass)

2593

1960

2594

1961

def server_bind(self):

2595

1962

"""This overrides the normal server_bind() function

2596

1963

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

2597

1964

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

2598

global SO_BINDTODEVICE

2599

1965

if self.interface is not None:

2600

1966

if SO_BINDTODEVICE is None:

2601

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

2602

# common enough.

2603

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

2604

SO_BINDTODEVICE = 25

2605

try:

2606

self.socket.setsockopt(

2607

socket.SOL_SOCKET, SO_BINDTODEVICE,

2608

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

2609

except socket.error as error:

2610

if error.errno == errno.EPERM:

2611

logger.error("No permission to bind to"

2612

" interface %s", self.interface)

2613

elif error.errno == errno.ENOPROTOOPT:

2614

logger.error("SO_BINDTODEVICE not available;"

2615

" cannot bind to interface %s",

2616

self.interface)

2617

elif error.errno == errno.ENODEV:

2618

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

2619

" cannot bind", self.interface)

2620

else:

2621

raise

1967

logger.error("SO_BINDTODEVICE does not exist;"

1968

" cannot bind to interface %s",

1969

self.interface)

1970

else:

1971

try:

1972

self.socket.setsockopt(socket.SOL_SOCKET,

1973

SO_BINDTODEVICE,

1974

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

1975

except socket.error as error:

1976

if error.errno == errno.EPERM:

1977

logger.error("No permission to bind to"

1978

" interface %s", self.interface)

1979

elif error.errno == errno.ENOPROTOOPT:

1980

logger.error("SO_BINDTODEVICE not available;"

1981

" cannot bind to interface %s",

1982

self.interface)

1983

elif error.errno == errno.ENODEV:

1984

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

1985

" cannot bind", self.interface)

1986

else:

1987

raise

2622

1988

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

2623

1989

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

2624

if self.server_address[1]:

2625

self.allow_reuse_address = True

2626

1990

if not self.server_address[0]:

2627

1991

if self.address_family == socket.AF_INET6:

2628

any_address = "::" # in6addr_any

1992

any_address = "::" # in6addr_any

2629

1993

else:

2630

any_address = "0.0.0.0" # INADDR_ANY

1994

any_address = "0.0.0.0" # INADDR_ANY

2631

1995

self.server_address = (any_address,

2632

1996

self.server_address[1])

2633

1997

elif not self.server_address[1]:

2634

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

1998

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

1999

0)

2635

2000

# if self.interface:

2636

2001

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

2637

2002

# 0, # port

2643

2008

2644

2009

class MandosServer(IPv6_TCPServer):

2645

2010

"""Mandos server.

2646

2011

2647

2012

Attributes:

2648

2013

clients: set of Client objects

2649

2014

gnutls_priority GnuTLS priority string

2650

2015

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

2651

2652

Assumes a GLib.MainLoop event loop.

2016

2017

Assumes a gobject.MainLoop event loop.

2653

2018

"""

2654

2655

2019

def __init__(self, server_address, RequestHandlerClass,

2656

interface=None,

2657

use_ipv6=True,

2658

clients=None,

2659

gnutls_priority=None,

2660

use_dbus=True,

2661

socketfd=None):

2020

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

2021

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

2662

2022

self.enabled = False

2663

2023

self.clients = clients

2664

2024

if self.clients is None:

2667

2027

self.gnutls_priority = gnutls_priority

2668

2028

IPv6_TCPServer.__init__(self, server_address,

2669

2029

RequestHandlerClass,

2670

interface=interface,

2671

use_ipv6=use_ipv6,

2672

socketfd=socketfd)

2673

2030

interface = interface,

2031

use_ipv6 = use_ipv6,

2032

socketfd = socketfd)

2674

2033

def server_activate(self):

2675

2034

if self.enabled:

2676

2035

return socketserver.TCPServer.server_activate(self)

2677

2036

2678

2037

def enable(self):

2679

2038

self.enabled = True

2680

2039

2681

2040

def add_pipe(self, parent_pipe, proc):

2682

2041

# Call "handle_ipc" for both data and EOF events

2683

GLib.io_add_watch(

2684

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

2685

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

2686

functools.partial(self.handle_ipc,

2687

parent_pipe=parent_pipe,

2688

proc=proc))

2689

2690

def handle_ipc(self, source, condition,

2691

parent_pipe=None,

2692

proc=None,

2693

client_object=None):

2042

gobject.io_add_watch(parent_pipe.fileno(),

2043

gobject.IO_IN | gobject.IO_HUP,

2044

functools.partial(self.handle_ipc,

2045

parent_pipe =

2046

parent_pipe,

2047

proc = proc))

2048

2049

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

2050

proc = None, client_object=None):

2694

2051

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

2695

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

2052

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

2696

2053

# Wait for other process to exit

2697

2054

proc.join()

2698

2055

return False

2699

2056

2700

2057

# Read a request from the child

2701

2058

request = parent_pipe.recv()

2702

2059

command = request[0]

2703

2060

2704

2061

if command == 'init':

2705

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

2706

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

2707

address = request[3]

2708

2709

for c in self.clients.values():

2710

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2711

continue

2712

if key_id and c.key_id == key_id:

2713

client = c

2714

break

2715

if fpr and c.fingerprint == fpr:

2062

fpr = request[1]

2063

address = request[2]

2064

2065

for c in self.clients.itervalues():

2066

if c.fingerprint == fpr:

2716

2067

client = c

2717

2068

break

2718

2069

else:

2719

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

2720

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

2070

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

2071

"dress: %s", fpr, address)

2721

2072

if self.use_dbus:

2722

2073

# Emit D-Bus signal

2723

mandos_dbus_service.ClientNotFound(key_id or fpr,

2074

mandos_dbus_service.ClientNotFound(fpr,

2724

2075

address[0])

2725

2076

parent_pipe.send(False)

2726

2077

return False

2727

2728

GLib.io_add_watch(

2729

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

2730

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

2731

functools.partial(self.handle_ipc,

2732

parent_pipe=parent_pipe,

2733

proc=proc,

2734

client_object=client))

2078

2079

gobject.io_add_watch(parent_pipe.fileno(),

2080

gobject.IO_IN | gobject.IO_HUP,

2081

functools.partial(self.handle_ipc,

2082

parent_pipe =

2083

parent_pipe,

2084

proc = proc,

2085

client_object =

2086

client))

2735

2087

parent_pipe.send(True)

2736

2088

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

2737

2089

# same fileno

2740

2092

funcname = request[1]

2741

2093

args = request[2]

2742

2094

kwargs = request[3]

2743

2095

2744

2096

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

2745

2097

funcname)(*args,

2746

**kwargs)))

2747

2098

**kwargs)))

2099

2748

2100

if command == 'getattr':

2749

2101

attrname = request[1]

2750

if isinstance(client_object.__getattribute__(attrname),

2751

collections.Callable):

2752

parent_pipe.send(('function', ))

2102

if callable(client_object.__getattribute__(attrname)):

2103

parent_pipe.send(('function',))

2753

2104

else:

2754

parent_pipe.send((

2755

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

2756

2105

parent_pipe.send(('data', client_object

2106

.__getattribute__(attrname)))

2107

2757

2108

if command == 'setattr':

2758

2109

attrname = request[1]

2759

2110

value = request[2]

2760

2111

setattr(client_object, attrname, value)

2761

2112

2762

2113

return True

2763

2114

2764

2115

2765

2116

def rfc3339_duration_to_delta(duration):

2766

2117

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

2767

2768

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

2769

True

2770

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

2771

True

2772

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

2773

True

2774

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

2775

True

2776

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

2777

True

2778

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

2779

True

2780

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

2781

True

2118

2119

>>> rfc3339_duration_to_delta("P7D")

2120

datetime.timedelta(7)

2121

>>> rfc3339_duration_to_delta("PT60S")

2122

datetime.timedelta(0, 60)

2123

>>> rfc3339_duration_to_delta("PT60M")

2124

datetime.timedelta(0, 3600)

2125

>>> rfc3339_duration_to_delta("PT24H")

2126

datetime.timedelta(1)

2127

>>> rfc3339_duration_to_delta("P1W")

2128

datetime.timedelta(7)

2129

>>> rfc3339_duration_to_delta("PT5M30S")

2130

datetime.timedelta(0, 330)

2131

>>> rfc3339_duration_to_delta("P1DT3M20S")

2132

datetime.timedelta(1, 200)

2782

2133

"""

2783

2134

2784

2135

# Parsing an RFC 3339 duration with regular expressions is not

2785

2136

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

2786

2137

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

2787

2138

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

2788

2139

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

2789

2140

# avoid excessive use of external libraries.

2790

2141

2791

2142

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

2792

Token = collections.namedtuple("Token", (

2793

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

2794

# a "group" containing digits

2795

"value", # datetime.timedelta or None

2796

"followers")) # Tokens valid after this token

2143

Token = collections.namedtuple("Token",

2144

("regexp", # To match token; if

2145

# "value" is not None,

2146

# must have a "group"

2147

# containing digits

2148

"value", # datetime.timedelta or

2149

# None

2150

"followers")) # Tokens valid after

2151

# this token

2797

2152

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

2798

2153

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

2799

2154

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

2800

2155

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

2801

2156

datetime.timedelta(seconds=1),

2802

frozenset((token_end, )))

2157

frozenset((token_end,)))

2803

2158

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

2804

2159

datetime.timedelta(minutes=1),

2805

2160

frozenset((token_second, token_end)))

2821

2176

frozenset((token_month, token_end)))

2822

2177

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

2823

2178

datetime.timedelta(weeks=1),

2824

frozenset((token_end, )))

2179

frozenset((token_end,)))

2825

2180

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

2826

2181

frozenset((token_year, token_month,

2827

2182

token_day, token_time,

2828

token_week)))

2829

# Define starting values:

2830

# Value so far

2831

value = datetime.timedelta()

2183

token_week))),

2184

# Define starting values

2185

value = datetime.timedelta() # Value so far

2832

2186

found_token = None

2833

# Following valid tokens

2834

followers = frozenset((token_duration, ))

2835

# String left to parse

2836

s = duration

2187

followers = frozenset(token_duration,) # Following valid tokens

2188

s = duration # String left to parse

2837

2189

# Loop until end token is found

2838

2190

while found_token is not token_end:

2839

2191

# Search for any currently valid tokens

2855

2207

break

2856

2208

else:

2857

2209

# No currently valid tokens were found

2858

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

2859

.format(duration))

2210

raise ValueError("Invalid RFC 3339 duration")

2860

2211

# End token found

2861

2212

return value

2862

2213

2863

2214

2864

2215

def string_to_delta(interval):

2865

2216

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

2866

2867

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

2868

True

2869

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

2870

True

2871

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

2872

True

2873

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

2874

True

2875

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

2876

True

2877

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

2878

True

2217

2218

>>> string_to_delta('7d')

2219

datetime.timedelta(7)

2220

>>> string_to_delta('60s')

2221

datetime.timedelta(0, 60)

2222

>>> string_to_delta('60m')

2223

datetime.timedelta(0, 3600)

2224

>>> string_to_delta('24h')

2225

datetime.timedelta(1)

2226

>>> string_to_delta('1w')

2227

datetime.timedelta(7)

2228

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

2229

datetime.timedelta(0, 330)

2879

2230

"""

2880

2231

2881

2232

try:

2882

2233

return rfc3339_duration_to_delta(interval)

2883

2234

except ValueError:

2884

2235

pass

2885

2236

2886

2237

timevalue = datetime.timedelta(0)

2887

2238

for s in interval.split():

2888

2239

try:

2889

suffix = s[-1]

2240

suffix = unicode(s[-1])

2890

2241

value = int(s[:-1])

2891

2242

if suffix == "d":

2892

2243

delta = datetime.timedelta(value)

2899

2250

elif suffix == "w":

2900

2251

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

2901

2252

else:

2902

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

2903

except IndexError as e:

2253

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

2254

.format(suffix))

2255

except (ValueError, IndexError) as e:

2904

2256

raise ValueError(*(e.args))

2905

2257

timevalue += delta

2906

2258

return timevalue

2907

2259

2908

2260

2909

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

2261

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

2910

2262

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

2911

2263

2912

2264

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

2913

2265

if os.fork():

2914

2266

sys.exit()

2922

2274

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

2923

2275

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

2924

2276

raise OSError(errno.ENODEV,

2925

"{} not a character device"

2277

"{0} not a character device"

2926

2278

.format(os.devnull))

2927

2279

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

2928

2280

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

2932

2284

2933

2285

2934

2286

def main():

2935

2287

2936

2288

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

2937

2289

# Parsing of options, both command line and config file

2938

2290

2939

2291

parser = argparse.ArgumentParser()

2940

2292

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

2941

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

2293

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

2942

2294

help="show version number and exit")

2943

2295

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

2944

2296

help="Bind to interface IF")

2977

2329

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

2978

2330

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

2979

2331

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

2980

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

2981

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

2982

default=None)

2983

2332

2984

2333

options = parser.parse_args()

2985

2334

2335

if options.check:

2336

import doctest

2337

doctest.testmod()

2338

sys.exit()

2339

2986

2340

# Default values for config file for server-global settings

2987

if gnutls.has_rawpk:

2988

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

2989

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

2990

else:

2991

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

2992

":+SIGN-DSA-SHA256")

2993

server_defaults = {"interface": "",

2994

"address": "",

2995

"port": "",

2996

"debug": "False",

2997

"priority": priority,

2998

"servicename": "Mandos",

2999

"use_dbus": "True",

3000

"use_ipv6": "True",

3001

"debuglevel": "",

3002

"restore": "True",

3003

"socket": "",

3004

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

3005

"foreground": "False",

3006

"zeroconf": "True",

3007

}

3008

del priority

3009

2341

server_defaults = { "interface": "",

2342

"address": "",

2343

"port": "",

2344

"debug": "False",

2345

"priority":

2346

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

2347

"servicename": "Mandos",

2348

"use_dbus": "True",

2349

"use_ipv6": "True",

2350

"debuglevel": "",

2351

"restore": "True",

2352

"socket": "",

2353

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

2354

"foreground": "False",

2355

}

2356

3010

2357

# Parse config file for server-global settings

3011

server_config = configparser.ConfigParser(server_defaults)

2358

server_config = configparser.SafeConfigParser(server_defaults)

3012

2359

del server_defaults

3013

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

3014

# Convert the ConfigParser object to a dict

2360

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

2361

"mandos.conf"))

2362

# Convert the SafeConfigParser object to a dict

3015

2363

server_settings = server_config.defaults()

3016

2364

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

3017

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

3018

"foreground", "zeroconf"):

2365

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

3019

2366

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

3020

2367

option)

3021

2368

if server_settings["port"]:

3031

2378

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

3032

2379

["socket"])

3033

2380

del server_config

3034

2381

3035

2382

# Override the settings from the config file with command line

3036

2383

# options, if set.

3037

2384

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

3038

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

3039

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

3040

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

2385

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

2386

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

2387

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

3041

2388

value = getattr(options, option)

3042

2389

if value is not None:

3043

2390

server_settings[option] = value

3044

2391

del options

3045

2392

# Force all strings to be unicode

3046

2393

for option in server_settings.keys():

3047

if isinstance(server_settings[option], bytes):

3048

server_settings[option] = (server_settings[option]

3049

.decode("utf-8"))

2394

if type(server_settings[option]) is str:

2395

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

3050

2396

# Force all boolean options to be boolean

3051

2397

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

3052

"foreground", "zeroconf"):

2398

"foreground"):

3053

2399

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

3054

2400

# Debug implies foreground

3055

2401

if server_settings["debug"]:

3056

2402

server_settings["foreground"] = True

3057

2403

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

3058

2404

3059

2405

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

3060

3061

if (not server_settings["zeroconf"]

3062

and not (server_settings["port"]

3063

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

3064

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

3065

2406

3066

2407

# For convenience

3067

2408

debug = server_settings["debug"]

3068

2409

debuglevel = server_settings["debuglevel"]

3071

2412

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

3072

2413

stored_state_file)

3073

2414

foreground = server_settings["foreground"]

3074

zeroconf = server_settings["zeroconf"]

3075

2415

3076

2416

if debug:

3077

2417

initlogger(debug, logging.DEBUG)

3078

2418

else:

3081

2421

else:

3082

2422

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

3083

2423

initlogger(debug, level)

3084

2424

3085

2425

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

3086

syslogger.setFormatter(

3087

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

3088

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

3089

server_settings["servicename"])))

3090

2426

syslogger.setFormatter(logging.Formatter

2427

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

2428

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

2429

.format(server_settings

2430

["servicename"])))

2431

3091

2432

# Parse config file with clients

3092

client_config = configparser.ConfigParser(Client.client_defaults)

2433

client_config = configparser.SafeConfigParser(Client

2434

.client_defaults)

3093

2435

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

3094

2436

"clients.conf"))

3095

2437

3096

2438

global mandos_dbus_service

3097

2439

mandos_dbus_service = None

3098

3099

socketfd = None

3100

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

3101

socketfd = server_settings["socket"]

3102

tcp_server = MandosServer(

3103

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

3104

ClientHandler,

3105

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

3106

use_ipv6=use_ipv6,

3107

gnutls_priority=server_settings["priority"],

3108

use_dbus=use_dbus,

3109

socketfd=socketfd)

2440

2441

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

2442

server_settings["port"]),

2443

ClientHandler,

2444

interface=(server_settings["interface"]

2445

or None),

2446

use_ipv6=use_ipv6,

2447

gnutls_priority=

2448

server_settings["priority"],

2449

use_dbus=use_dbus,

2450

socketfd=(server_settings["socket"]

2451

or None))

3110

2452

if not foreground:

3111

2453

pidfilename = "/run/mandos.pid"

3112

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

3113

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

3114

2454

pidfile = None

3115

2455

try:

3116

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

2456

pidfile = open(pidfilename, "w")

3117

2457

except IOError as e:

3118

2458

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

3119

2459

exc_info=e)

3120

3121

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

3122

("mandos", "mandos"),

3123

("nobody", "nogroup")):

2460

2461

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

3124

2462

try:

3125

2463

uid = pwd.getpwnam(name).pw_uid

3126

gid = pwd.getpwnam(group).pw_gid

2464

gid = pwd.getpwnam(name).pw_gid

3127

2465

break

3128

2466

except KeyError:

3129

2467

continue

3133

2471

try:

3134

2472

os.setgid(gid)

3135

2473

os.setuid(uid)

3136

if debug:

3137

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

3138

gid))

3139

2474

except OSError as error:

3140

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

3141

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

3142

2475

if error.errno != errno.EPERM:

3143

raise

3144

2476

raise error

2477

3145

2478

if debug:

3146

2479

# Enable all possible GnuTLS debugging

3147

2480

3148

2481

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

3149

2482

# - GnuTLS manual

3150

gnutls.global_set_log_level(11)

3151

3152

@gnutls.log_func

2483

gnutls.library.functions.gnutls_global_set_log_level(11)

2484

2485

@gnutls.library.types.gnutls_log_func

3153

2486

def debug_gnutls(level, string):

3154

2487

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

3155

3156

gnutls.global_set_log_function(debug_gnutls)

3157

2488

2489

(gnutls.library.functions

2490

.gnutls_global_set_log_function(debug_gnutls))

2491

3158

2492

# Redirect stdin so all checkers get /dev/null

3159

2493

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

3160

2494

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

3161

2495

if null > 2:

3162

2496

os.close(null)

3163

2497

3164

2498

# Need to fork before connecting to D-Bus

3165

2499

if not foreground:

3166

2500

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

3167

2501

daemon()

3168

3169

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

3170

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

3171

# need to inform GLib that threads will be used.

3172

GLib.threads_init()

3173

2502

2503

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

2504

# need to inform gobject that threads will be used.

2505

gobject.threads_init()

2506

3174

2507

global main_loop

3175

2508

# From the Avahi example code

3176

2509

DBusGMainLoop(set_as_default=True)

3177

main_loop = GLib.MainLoop()

2510

main_loop = gobject.MainLoop()

3178

2511

bus = dbus.SystemBus()

3179

2512

# End of Avahi example code

3180

2513

if use_dbus:

3181

2514

try:

3182

2515

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

3183

bus,

3184

do_not_queue=True)

3185

old_bus_name = dbus.service.BusName(

3186

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

3187

do_not_queue=True)

3188

except dbus.exceptions.DBusException as e:

2516

bus, do_not_queue=True)

2517

old_bus_name = (dbus.service.BusName

2518

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

2519

do_not_queue=True))

2520

except dbus.exceptions.NameExistsException as e:

3189

2521

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

3190

2522

use_dbus = False

3191

2523

server_settings["use_dbus"] = False

3192

2524

tcp_server.use_dbus = False

3193

if zeroconf:

3194

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3195

service = AvahiServiceToSyslog(

3196

name=server_settings["servicename"],

3197

servicetype="_mandos._tcp",

3198

protocol=protocol,

3199

bus=bus)

3200

if server_settings["interface"]:

3201

service.interface = if_nametoindex(

3202

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

3203

2525

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2526

service = AvahiServiceToSyslog(name =

2527

server_settings["servicename"],

2528

servicetype = "_mandos._tcp",

2529

protocol = protocol, bus = bus)

2530

if server_settings["interface"]:

2531

service.interface = (if_nametoindex

2532

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

2533

3204

2534

global multiprocessing_manager

3205

2535

multiprocessing_manager = multiprocessing.Manager()

3206

2536

3207

2537

client_class = Client

3208

2538

if use_dbus:

3209

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

3210

2539

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

2540

3211

2541

client_settings = Client.config_parser(client_config)

3212

2542

old_client_settings = {}

3213

2543

clients_data = {}

3214

2544

3215

2545

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

3216

2546

global wnull

3217

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

2547

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

3218

2548

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

3219

2549

# mode

3220

2550

if debug or not foreground:

3221

2551

wnull.close()

3222

2552

3223

2553

# Get client data and settings from last running state.

3224

2554

if server_settings["restore"]:

3225

2555

try:

3226

2556

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

3227

if sys.version_info.major == 2:

3228

clients_data, old_client_settings = pickle.load(

3229

stored_state)

3230

else:

3231

bytes_clients_data, bytes_old_client_settings = (

3232

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

3233

# Fix bytes to strings

3234

# clients_data

3235

# .keys()

3236

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

3237

if isinstance(key, bytes)

3238

else key): value

3239

for key, value in

3240

bytes_clients_data.items()}

3241

del bytes_clients_data

3242

for key in clients_data:

3243

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

3244

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

3245

for k, v in

3246

clients_data[key].items()}

3247

clients_data[key] = value

3248

# .client_structure

3249

value["client_structure"] = [

3250

(s.decode("utf-8")

3251

if isinstance(s, bytes)

3252

else s) for s in

3253

value["client_structure"]]

3254

# .name, .host, and .checker_command

3255

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

3256

if isinstance(value[k], bytes):

3257

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

3258

if "key_id" not in value:

3259

value["key_id"] = ""

3260

elif "fingerprint" not in value:

3261

value["fingerprint"] = ""

3262

# old_client_settings

3263

# .keys()

3264

old_client_settings = {

3265

(key.decode("utf-8")

3266

if isinstance(key, bytes)

3267

else key): value

3268

for key, value in

3269

bytes_old_client_settings.items()}

3270

del bytes_old_client_settings

3271

# .host and .checker_command

3272

for value in old_client_settings.values():

3273

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

3274

if isinstance(value[attribute], bytes):

3275

value[attribute] = (value[attribute]

3276

.decode("utf-8"))

2557

clients_data, old_client_settings = (pickle.load

2558

(stored_state))

3277

2559

os.remove(stored_state_path)

3278

2560

except IOError as e:

3279

2561

if e.errno == errno.ENOENT:

3280

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

3281

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

2562

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

2563

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

3282

2564

else:

3283

2565

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

3284

2566

exc_info=e)

3285

2567

raise

3286

2568

except EOFError as e:

3287

2569

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

3288

"EOFError:",

3289

exc_info=e)

3290

2570

"EOFError:", exc_info=e)

2571

3291

2572

with PGPEngine() as pgp:

3292

for client_name, client in clients_data.items():

2573

for client_name, client in clients_data.iteritems():

3293

2574

# Skip removed clients

3294

2575

if client_name not in client_settings:

3295

2576

continue

3296

2577

3297

2578

# Decide which value to use after restoring saved state.

3298

2579

# We have three different values: Old config file,

3299

2580

# new config file, and saved state.

3304

2585

# For each value in new config, check if it

3305

2586

# differs from the old config value (Except for

3306

2587

# the "secret" attribute)

3307

if (name != "secret"

3308

and (value !=

3309

old_client_settings[client_name][name])):

2588

if (name != "secret" and

2589

value != old_client_settings[client_name]

2590

[name]):

3310

2591

client[name] = value

3311

2592

except KeyError:

3312

2593

pass

3313

2594

3314

2595

# Clients who has passed its expire date can still be

3315

# enabled if its last checker was successful. A Client

2596

# enabled if its last checker was successful. Clients

3316

2597

# whose checker succeeded before we stored its state is

3317

2598

# assumed to have successfully run all checkers during

3318

2599

# downtime.

3320

2601

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

3321

2602

if not client["last_checked_ok"]:

3322

2603

logger.warning(

3323

"disabling client {} - Client never "

3324

"performed a successful checker".format(

3325

client_name))

2604

"disabling client {0} - Client never "

2605

"performed a successful checker"

2606

.format(client_name))

3326

2607

client["enabled"] = False

3327

2608

elif client["last_checker_status"] != 0:

3328

2609

logger.warning(

3329

"disabling client {} - Client last"

3330

" checker failed with error code"

3331

" {}".format(

3332

client_name,

3333

client["last_checker_status"]))

2610

"disabling client {0} - Client "

2611

"last checker failed with error code {1}"

2612

.format(client_name,

2613

client["last_checker_status"]))

3334

2614

client["enabled"] = False

3335

2615

else:

3336

client["expires"] = (

3337

datetime.datetime.utcnow()

3338

+ client["timeout"])

2616

client["expires"] = (datetime.datetime

2617

.utcnow()

2618

+ client["timeout"])

3339

2619

logger.debug("Last checker succeeded,"

3340

" keeping {} enabled".format(

3341

client_name))

2620

" keeping {0} enabled"

2621

.format(client_name))

3342

2622

try:

3343

client["secret"] = pgp.decrypt(

3344

client["encrypted_secret"],

3345

client_settings[client_name]["secret"])

2623

client["secret"] = (

2624

pgp.decrypt(client["encrypted_secret"],

2625

client_settings[client_name]

2626

["secret"]))

3346

2627

except PGPError:

3347

2628

# If decryption fails, we use secret from new settings

3348

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

3349

client_name))

3350

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

3351

["secret"])

3352

2629

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

2630

.format(client_name))

2631

client["secret"] = (

2632

client_settings[client_name]["secret"])

2633

3353

2634

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

3354

2635

for client_name in (set(old_client_settings)

3355

2636

- set(client_settings)):

3357

2638

for client_name in (set(client_settings)

3358

2639

- set(old_client_settings)):

3359

2640

clients_data[client_name] = client_settings[client_name]

3360

2641

3361

2642

# Create all client objects

3362

for client_name, client in clients_data.items():

2643

for client_name, client in clients_data.iteritems():

3363

2644

tcp_server.clients[client_name] = client_class(

3364

name=client_name,

3365

settings=client,

3366

server_settings=server_settings)

3367

2645

name = client_name, settings = client,

2646

server_settings = server_settings)

2647

3368

2648

if not tcp_server.clients:

3369

2649

logger.warning("No clients defined")

3370

2650

3371

2651

if not foreground:

3372

2652

if pidfile is not None:

3373

pid = os.getpid()

3374

2653

try:

3375

2654

with pidfile:

3376

print(pid, file=pidfile)

2655

pid = os.getpid()

2656

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

3377

2657

except IOError:

3378

2658

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

3379

2659

pidfilename, pid)

3380

2660

del pidfile

3381

2661

del pidfilename

3382

3383

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

3384

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3385

lambda: main_loop.quit() and False)

3386

2662

2663

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

2664

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

2665

3387

2666

if use_dbus:

3388

3389

@alternate_dbus_interfaces(

3390

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

3391

class MandosDBusService(DBusObjectWithObjectManager):

2667

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

2668

"se.bsnet.fukt.Mandos"})

2669

class MandosDBusService(DBusObjectWithProperties):

3392

2670

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

3393

3394

2671

def __init__(self):

3395

2672

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

3396

3397

2673

_interface = "se.recompile.Mandos"

3398

2674

2675

@dbus_interface_annotations(_interface)

2676

def _foo(self):

2677

return { "org.freedesktop.DBus.Property"

2678

".EmitsChangedSignal":

2679

"false"}

2680

3399

2681

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

3400

2682

def ClientAdded(self, objpath):

3401

2683

"D-Bus signal"

3402

2684

pass

3403

2685

3404

2686

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

3405

def ClientNotFound(self, key_id, address):

2687

def ClientNotFound(self, fingerprint, address):

3406

2688

"D-Bus signal"

3407

2689

pass

3408

3409

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

3410

"true"})

2690

3411

2691

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

3412

2692

def ClientRemoved(self, objpath, name):

3413

2693

"D-Bus signal"

3414

2694

pass

3415

3416

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

3417

"true"})

2695

3418

2696

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

3419

2697

def GetAllClients(self):

3420

2698

"D-Bus method"

3421

return dbus.Array(c.dbus_object_path for c in

3422

tcp_server.clients.values())

3423

3424

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

3425

"true"})

2699

return dbus.Array(c.dbus_object_path

2700

for c in

2701

tcp_server.clients.itervalues())

2702

3426

2703

@dbus.service.method(_interface,

3427

2704

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

3428

2705

def GetAllClientsWithProperties(self):

3429

2706

"D-Bus method"

3430

2707

return dbus.Dictionary(

3431

{c.dbus_object_path: c.GetAll(

3432

"se.recompile.Mandos.Client")

3433

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

2708

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

2709

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

3434

2710

signature="oa{sv}")

3435

2711

3436

2712

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

3437

2713

def RemoveClient(self, object_path):

3438

2714

"D-Bus method"

3439

for c in tcp_server.clients.values():

2715

for c in tcp_server.clients.itervalues():

3440

2716

if c.dbus_object_path == object_path:

3441

2717

del tcp_server.clients[c.name]

3442

2718

c.remove_from_connection()

3443

# Don't signal the disabling

2719

# Don't signal anything except ClientRemoved

3444

2720

c.disable(quiet=True)

3445

# Emit D-Bus signal for removal

3446

self.client_removed_signal(c)

2721

# Emit D-Bus signal

2722

self.ClientRemoved(object_path, c.name)

3447

2723

return

3448

2724

raise KeyError(object_path)

3449

2725

3450

2726

del _interface

3451

3452

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3453

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

3454

def GetManagedObjects(self):

3455

"""D-Bus method"""

3456

return dbus.Dictionary(

3457

{client.dbus_object_path:

3458

dbus.Dictionary(

3459

{interface: client.GetAll(interface)

3460

for interface in

3461

client._get_all_interface_names()})

3462

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

3463

3464

def client_added_signal(self, client):

3465

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

3466

if use_dbus:

3467

# New standard signal

3468

self.InterfacesAdded(

3469

client.dbus_object_path,

3470

dbus.Dictionary(

3471

{interface: client.GetAll(interface)

3472

for interface in

3473

client._get_all_interface_names()}))

3474

# Old signal

3475

self.ClientAdded(client.dbus_object_path)

3476

3477

def client_removed_signal(self, client):

3478

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

3479

if use_dbus:

3480

# New standard signal

3481

self.InterfacesRemoved(

3482

client.dbus_object_path,

3483

client._get_all_interface_names())

3484

# Old signal

3485

self.ClientRemoved(client.dbus_object_path,

3486

client.name)

3487

2727

3488

2728

mandos_dbus_service = MandosDBusService()

3489

3490

# Save modules to variables to exempt the modules from being

3491

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

3492

mp = multiprocessing

3493

wn = wnull

3494

2729

3495

2730

def cleanup():

3496

2731

"Cleanup function; run on exit"

3497

if zeroconf:

3498

service.cleanup()

3499

3500

mp.active_children()

3501

wn.close()

2732

service.cleanup()

2733

2734

multiprocessing.active_children()

2735

wnull.close()

3502

2736

if not (tcp_server.clients or client_settings):

3503

2737

return

3504

2738

3505

2739

# Store client before exiting. Secrets are encrypted with key

3506

2740

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

3507

2741

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

3508

2742

clients = {}

3509

2743

with PGPEngine() as pgp:

3510

for client in tcp_server.clients.values():

2744

for client in tcp_server.clients.itervalues():

3511

2745

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

3512

2746

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

3513

2747

key)

3514

2748

client_dict = {}

3515

2749

3516

2750

# A list of attributes that can not be pickled

3517

2751

# + secret.

3518

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

3519

"checker", "server_settings"}

3520

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

3521

.Object):

2752

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

2753

"checker", "server_settings"))

2754

for name, typ in (inspect.getmembers

2755

(dbus.service.Object)):

3522

2756

exclude.add(name)

3523

2757

3524

2758

client_dict["encrypted_secret"] = (client

3525

2759

.encrypted_secret)

3526

2760

for attr in client.client_structure:

3527

2761

if attr not in exclude:

3528

2762

client_dict[attr] = getattr(client, attr)

3529

2763

3530

2764

clients[client.name] = client_dict

3531

2765

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

3532

2766

3533

2767

try:

3534

with tempfile.NamedTemporaryFile(

3535

mode='wb',

3536

suffix=".pickle",

3537

prefix='clients-',

3538

dir=os.path.dirname(stored_state_path),

3539

delete=False) as stored_state:

3540

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

3541

protocol=2)

3542

tempname = stored_state.name

2768

with (tempfile.NamedTemporaryFile

2769

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

2770

dir=os.path.dirname(stored_state_path),

2771

delete=False)) as stored_state:

2772

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

2773

tempname=stored_state.name

3543

2774

os.rename(tempname, stored_state_path)

3544

2775

except (IOError, OSError) as e:

3545

2776

if not debug:

3548

2779

except NameError:

3549

2780

pass

3550

2781

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

3551

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

2782

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

3552

2783

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

3553

2784

else:

3554

2785

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

3555

2786

exc_info=e)

3556

raise

3557

2787

raise e

2788

3558

2789

# Delete all clients, and settings from config

3559

2790

while tcp_server.clients:

3560

2791

name, client = tcp_server.clients.popitem()

3561

2792

if use_dbus:

3562

2793

client.remove_from_connection()

3563

# Don't signal the disabling

2794

# Don't signal anything except ClientRemoved

3564

2795

client.disable(quiet=True)

3565

# Emit D-Bus signal for removal

3566

2796

if use_dbus:

3567

mandos_dbus_service.client_removed_signal(client)

2797

# Emit D-Bus signal

2798

mandos_dbus_service.ClientRemoved(client

2799

.dbus_object_path,

2800

client.name)

3568

2801

client_settings.clear()

3569

2802

3570

2803

atexit.register(cleanup)

3571

3572

for client in tcp_server.clients.values():

2804

2805

for client in tcp_server.clients.itervalues():

3573

2806

if use_dbus:

3574

# Emit D-Bus signal for adding

3575

mandos_dbus_service.client_added_signal(client)

2807

# Emit D-Bus signal

2808

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3576

2809

# Need to initiate checking of clients

3577

2810

if client.enabled:

3578

2811

client.init_checker()

3579

2812

3580

2813

tcp_server.enable()

3581

2814

tcp_server.server_activate()

3582

2815

3583

2816

# Find out what port we got

3584

if zeroconf:

3585

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

2817

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

3586

2818

if use_ipv6:

3587

2819

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

3588

2820

" flowinfo %d, scope_id %d",

3590

2822

else: # IPv4

3591

2823

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

3592

2824

*tcp_server.socket.getsockname())

3593

3594

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

3595

2825

2826

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

2827

3596

2828

try:

3597

if zeroconf:

3598

# From the Avahi example code

3599

try:

3600

service.activate()

3601

except dbus.exceptions.DBusException as error:

3602

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

3603

cleanup()

3604

sys.exit(1)

3605

# End of Avahi example code

3606

3607

GLib.io_add_watch(

3608

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

3609

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3610

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

3611

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

3612

2829

# From the Avahi example code

2830

try:

2831

service.activate()

2832

except dbus.exceptions.DBusException as error:

2833

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

2834

cleanup()

2835

sys.exit(1)

2836

# End of Avahi example code

2837

2838

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

2839

lambda *args, **kwargs:

2840

(tcp_server.handle_request

2841

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

2842

3613

2843

logger.debug("Starting main loop")

3614

2844

main_loop.run()

3615

2845

except AvahiError as error:

3624

2854

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

3625

2855

cleanup()

3626

2856

3627

3628

def should_only_run_tests():

3629

parser = argparse.ArgumentParser(add_help=False)

3630

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

3631

args, unknown_args = parser.parse_known_args()

3632

run_tests = args.check

3633

if run_tests:

3634

# Remove --check argument from sys.argv

3635

sys.argv[1:] = unknown_args

3636

return run_tests

3637

3638

# Add all tests from doctest strings

3639

def load_tests(loader, tests, none):

3640

import doctest

3641

tests.addTests(doctest.DocTestSuite())

3642

return tests

3643

3644

2857

if __name__ == '__main__':

3645

try:

3646

if should_only_run_tests():

3647

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

3648

unittest.main()

3649

else:

3650

main()

3651

finally:

3652

logging.shutdown()

2858

main()