/mandos/trunk : revision 237.4.80

1

#!/usr/bin/python3 -bI

2

# -*- coding: utf-8; lexical-binding: t -*-

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

#

33

34

from __future__ import (division, absolute_import, print_function,

35

unicode_literals)

36

39

except ImportError:

40

pass

41

42

import sys

43

import unittest

44

import argparse

45

import logging

46

import os

47

42

try:

48

43

import SocketServer as socketserver

49

44

except ImportError:

50

45

import socketserver

51

46

import socket

47

import argparse

52

48

import datetime

53

49

import errno

54

50

try:

55

51

import ConfigParser as configparser

56

52

except ImportError:

57

53

import configparser

54

import sys

58

55

import re

56

import os

59

57

import signal

60

58

import subprocess

61

59

import atexit

62

60

import stat

61

import logging

63

62

import logging.handlers

64

63

import pwd

65

64

import contextlib

77

76

import itertools

78

77

import collections

79

78

import codecs

80

import random

81

import shlex

82

79

83

80

import dbus

84

81

import dbus.service

85

import gi

86

82

from gi.repository import GLib

87

83

from dbus.mainloop.glib import DBusGMainLoop

88

84

import ctypes

90

86

import xml.dom.minidom

91

87

import inspect

92

88

93

if sys.version_info.major == 2:

94

__metaclass__ = type

95

str = unicode

96

input = raw_input

97

98

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

99

try:

100

collections.abc.Callable

101

except AttributeError:

102

class abc:

103

Callable = collections.Callable

104

collections.abc = abc

105

del abc

106

107

# Add shlex.quote if it does not exist

108

try:

109

shlex.quote

110

except AttributeError:

111

shlex.quote = re.escape

112

113

# Show warnings by default

114

if not sys.warnoptions:

115

import warnings

116

warnings.simplefilter("default")

117

118

89

# Try to find the value of SO_BINDTODEVICE:

119

90

try:

120

91

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

140

111

# No value found

141

112

SO_BINDTODEVICE = None

142

113

143

if sys.version_info < (3, 2):

144

configparser.Configparser = configparser.SafeConfigParser

114

if sys.version_info.major == 2:

115

str = unicode

145

116

146

version = "1.8.15"

117

version = "1.7.10"

147

118

stored_state_file = "clients.pickle"

148

119

149

log = logging.getLogger(os.path.basename(sys.argv[0]))

150

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

120

logger = logging.getLogger()

151

121

syslogger = None

152

122

153

123

try:

154

124

if_nametoindex = ctypes.cdll.LoadLibrary(

155

125

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

156

126

except (OSError, AttributeError):

157

127

158

128

def if_nametoindex(interface):

159

129

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

160

130

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

183

153

184

154

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

185

155

"""init logger and add loglevel"""

186

156

187

157

global syslogger

188

158

syslogger = (logging.handlers.SysLogHandler(

189

facility=logging.handlers.SysLogHandler.LOG_DAEMON,

190

address="/dev/log"))

159

facility = logging.handlers.SysLogHandler.LOG_DAEMON,

160

address = "/dev/log"))

191

161

syslogger.setFormatter(logging.Formatter

192

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

193

" %(message)s"))

194

log.addHandler(syslogger)

195

162

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

163

' %(message)s'))

164

logger.addHandler(syslogger)

165

196

166

if debug:

197

167

console = logging.StreamHandler()

198

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

199

" [%(process)d]:"

200

" %(levelname)s:"

201

" %(message)s"))

202

log.addHandler(console)

203

log.setLevel(level)

168

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

169

' [%(process)d]:'

170

' %(levelname)s:'

171

' %(message)s'))

172

logger.addHandler(console)

173

logger.setLevel(level)

204

174

205

175

206

176

class PGPError(Exception):

208

178

pass

209

179

210

180

211

class PGPEngine:

181

class PGPEngine(object):

212

182

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

213

183

214

184

def __init__(self):

215

185

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

216

186

self.gpg = "gpg"

218

188

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

219

189

for line in output.splitlines():

220

190

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

221

if name == b"gpg":

191

if name == "gpg":

222

192

self.gpg = path

223

193

break

224

194

except OSError as e:

225

195

if e.errno != errno.ENOENT:

226

196

raise

227

self.gnupgargs = ["--batch",

228

"--homedir", self.tempdir,

229

"--force-mdc",

230

"--quiet"]

197

self.gnupgargs = ['--batch',

198

'--homedir', self.tempdir,

199

'--force-mdc',

200

'--quiet']

231

201

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

232

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

202

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

233

203

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

234

204

235

205

def __enter__(self):

236

206

return self

237

207

238

208

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

239

209

self._cleanup()

240

210

return False

241

211

242

212

def __del__(self):

243

213

self._cleanup()

244

214

245

215

def _cleanup(self):

246

216

if self.tempdir is not None:

247

217

# Delete contents of tempdir

248

218

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

249

topdown=False):

219

topdown = False):

250

220

for filename in files:

251

221

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

252

222

for dirname in dirs:

254

224

# Remove tempdir

255

225

os.rmdir(self.tempdir)

256

226

self.tempdir = None

257

227

258

228

def password_encode(self, password):

259

229

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

260

230

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

265

235

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

266

236

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

267

237

return encoded

268

238

269

239

def encrypt(self, data, password):

270

240

passphrase = self.password_encode(password)

271

241

with tempfile.NamedTemporaryFile(

272

242

dir=self.tempdir) as passfile:

273

243

passfile.write(passphrase)

274

244

passfile.flush()

275

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

276

"--passphrase-file",

245

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

246

'--passphrase-file',

277

247

passfile.name]

278

248

+ self.gnupgargs,

279

stdin=subprocess.PIPE,

280

stdout=subprocess.PIPE,

281

stderr=subprocess.PIPE)

282

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

249

stdin = subprocess.PIPE,

250

stdout = subprocess.PIPE,

251

stderr = subprocess.PIPE)

252

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

283

253

if proc.returncode != 0:

284

254

raise PGPError(err)

285

255

return ciphertext

286

256

287

257

def decrypt(self, data, password):

288

258

passphrase = self.password_encode(password)

289

259

with tempfile.NamedTemporaryFile(

290

dir=self.tempdir) as passfile:

260

dir = self.tempdir) as passfile:

291

261

passfile.write(passphrase)

292

262

passfile.flush()

293

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

294

"--passphrase-file",

263

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

264

'--passphrase-file',

295

265

passfile.name]

296

266

+ self.gnupgargs,

297

stdin=subprocess.PIPE,

298

stdout=subprocess.PIPE,

299

stderr=subprocess.PIPE)

300

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

267

stdin = subprocess.PIPE,

268

stdout = subprocess.PIPE,

269

stderr = subprocess.PIPE)

270

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

301

271

if proc.returncode != 0:

302

272

raise PGPError(err)

303

273

return decrypted_plaintext

304

274

305

306

275

# Pretend that we have an Avahi module

307

class avahi:

308

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

309

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

310

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

311

PROTO_INET = 0 # avahi-common/address.h

312

PROTO_INET6 = 1 # avahi-common/address.h

276

class Avahi(object):

277

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

278

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

279

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

280

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

281

PROTO_INET = 0 # avahi-common/address.h

282

PROTO_INET6 = 1 # avahi-common/address.h

313

283

DBUS_NAME = "org.freedesktop.Avahi"

314

284

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

315

285

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

316

286

DBUS_PATH_SERVER = "/"

317

318

@staticmethod

319

def string_array_to_txt_array(t):

287

def string_array_to_txt_array(self, t):

320

288

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

321

289

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

322

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

323

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

324

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

325

SERVER_INVALID = 0 # avahi-common/defs.h

326

SERVER_REGISTERING = 1 # avahi-common/defs.h

327

SERVER_RUNNING = 2 # avahi-common/defs.h

328

SERVER_COLLISION = 3 # avahi-common/defs.h

329

SERVER_FAILURE = 4 # avahi-common/defs.h

330

290

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

291

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

292

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

293

SERVER_INVALID = 0 # avahi-common/defs.h

294

SERVER_REGISTERING = 1 # avahi-common/defs.h

295

SERVER_RUNNING = 2 # avahi-common/defs.h

296

SERVER_COLLISION = 3 # avahi-common/defs.h

297

SERVER_FAILURE = 4 # avahi-common/defs.h

298

avahi = Avahi()

331

299

332

300

class AvahiError(Exception):

333

301

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

344

312

pass

345

313

346

314

347

class AvahiService:

315

class AvahiService(object):

348

316

"""An Avahi (Zeroconf) service.

349

317

350

318

Attributes:

351

319

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

352

320

Used to optionally bind to the specified interface.

353

name: string; Example: "Mandos"

354

type: string; Example: "_mandos._tcp".

321

name: string; Example: 'Mandos'

322

type: string; Example: '_mandos._tcp'.

355

323

See <https://www.iana.org/assignments/service-names-port-numbers>

356

324

port: integer; what port to announce

357

325

TXT: list of strings; TXT record for the service

364

332

server: D-Bus Server

365

333

bus: dbus.SystemBus()

366

334

"""

367

335

368

336

def __init__(self,

369

interface=avahi.IF_UNSPEC,

370

name=None,

371

servicetype=None,

372

port=None,

373

TXT=None,

374

domain="",

375

host="",

376

max_renames=32768,

377

protocol=avahi.PROTO_UNSPEC,

378

bus=None):

337

interface = avahi.IF_UNSPEC,

338

name = None,

339

servicetype = None,

340

port = None,

341

TXT = None,

342

domain = "",

343

host = "",

344

max_renames = 32768,

345

protocol = avahi.PROTO_UNSPEC,

346

bus = None):

379

347

self.interface = interface

380

348

self.name = name

381

349

self.type = servicetype

390

358

self.server = None

391

359

self.bus = bus

392

360

self.entry_group_state_changed_match = None

393

361

394

362

def rename(self, remove=True):

395

363

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

396

364

if self.rename_count >= self.max_renames:

397

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

398

" after %i retries, exiting.",

399

self.rename_count)

365

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

366

" after %i retries, exiting.",

367

self.rename_count)

400

368

raise AvahiServiceError("Too many renames")

401

369

self.name = str(

402

370

self.server.GetAlternativeServiceName(self.name))

403

371

self.rename_count += 1

404

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

405

self.name)

372

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

373

self.name)

406

374

if remove:

407

375

self.remove()

408

376

try:

410

378

except dbus.exceptions.DBusException as error:

411

379

if (error.get_dbus_name()

412

380

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

413

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

381

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

414

382

return self.rename(remove=False)

415

383

else:

416

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

384

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

417

385

self.cleanup()

418

386

os._exit(1)

419

387

420

388

def remove(self):

421

389

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

422

390

if self.entry_group_state_changed_match is not None:

424

392

self.entry_group_state_changed_match = None

425

393

if self.group is not None:

426

394

self.group.Reset()

427

395

428

396

def add(self):

429

397

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

430

398

self.remove()

435

403

avahi.DBUS_INTERFACE_ENTRY_GROUP)

436

404

self.entry_group_state_changed_match = (

437

405

self.group.connect_to_signal(

438

"StateChanged", self.entry_group_state_changed))

439

log.debug("Adding Zeroconf service '%s' of type '%s' ...",

440

self.name, self.type)

406

'StateChanged', self.entry_group_state_changed))

407

logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

408

self.name, self.type)

441

409

self.group.AddService(

442

410

self.interface,

443

411

self.protocol,

447

415

dbus.UInt16(self.port),

448

416

avahi.string_array_to_txt_array(self.TXT))

449

417

self.group.Commit()

450

418

451

419

def entry_group_state_changed(self, state, error):

452

420

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

453

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

454

421

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

422

455

423

if state == avahi.ENTRY_GROUP_ESTABLISHED:

456

log.debug("Zeroconf service established.")

424

logger.debug("Zeroconf service established.")

457

425

elif state == avahi.ENTRY_GROUP_COLLISION:

458

log.info("Zeroconf service name collision.")

426

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

459

427

self.rename()

460

428

elif state == avahi.ENTRY_GROUP_FAILURE:

461

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

462

str(error))

429

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

430

str(error))

463

431

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

464

432

465

433

def cleanup(self):

466

434

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

467

435

if self.group is not None:

472

440

pass

473

441

self.group = None

474

442

self.remove()

475

443

476

444

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

477

445

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

478

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

446

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

479

447

bad_states = {

480

448

avahi.SERVER_INVALID: "Zeroconf server invalid",

481

449

avahi.SERVER_REGISTERING: None,

485

453

if state in bad_states:

486

454

if bad_states[state] is not None:

487

455

if error is None:

488

log.error(bad_states[state])

456

logger.error(bad_states[state])

489

457

else:

490

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

458

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

491

459

self.cleanup()

492

460

elif state == avahi.SERVER_RUNNING:

493

461

try:

495

463

except dbus.exceptions.DBusException as error:

496

464

if (error.get_dbus_name()

497

465

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

498

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

466

logger.info("Local Zeroconf service name"

467

" collision.")

499

468

return self.rename(remove=False)

500

469

else:

501

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

470

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

502

471

self.cleanup()

503

472

os._exit(1)

504

473

else:

505

474

if error is None:

506

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

475

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

507

476

else:

508

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

509

477

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

478

510

479

def activate(self):

511

480

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

512

481

if self.server is None:

523

492

class AvahiServiceToSyslog(AvahiService):

524

493

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

525

494

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

526

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

527

**kwargs)

495

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

528

496

syslogger.setFormatter(logging.Formatter(

529

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

497

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

530

498

.format(self.name)))

531

499

return ret

532

500

533

534

501

# Pretend that we have a GnuTLS module

535

class gnutls:

536

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

537

538

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

539

if library is None:

540

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

541

_library = ctypes.cdll.LoadLibrary(library)

542

del library

543

502

class GnuTLS(object):

503

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

504

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

505

506

_library = ctypes.cdll.LoadLibrary(

507

ctypes.util.find_library("gnutls"))

508

_need_version = b"3.3.0"

509

def __init__(self):

510

# Need to use class name "GnuTLS" here, since this method is

511

# called before the assignment to the "gnutls" global variable

512

# happens.

513

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

514

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

515

.format(self._need_version))

516

544

517

# Unless otherwise indicated, the constants and types below are

545

518

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

546

519

547

520

# Constants

548

521

E_SUCCESS = 0

549

522

E_INTERRUPTED = -52

550

523

E_AGAIN = -28

551

524

CRT_OPENPGP = 2

552

CRT_RAWPK = 3

553

525

CLIENT = 2

554

526

SHUT_RDWR = 0

555

527

CRD_CERTIFICATE = 1

556

528

E_NO_CERTIFICATE_FOUND = -49

557

X509_FMT_DER = 0

558

NO_TICKETS = 1<<10

559

ENABLE_RAWPK = 1<<18

560

CTYPE_PEERS = 3

561

KEYID_USE_SHA256 = 1 # gnutls/x509.h

562

529

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

563

530

564

531

# Types

565

class _session_int(ctypes.Structure):

532

class session_int(ctypes.Structure):

566

533

_fields_ = []

567

session_t = ctypes.POINTER(_session_int)

568

534

session_t = ctypes.POINTER(session_int)

569

535

class certificate_credentials_st(ctypes.Structure):

570

536

_fields_ = []

571

537

certificate_credentials_t = ctypes.POINTER(

572

538

certificate_credentials_st)

573

539

certificate_type_t = ctypes.c_int

574

575

540

class datum_t(ctypes.Structure):

576

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

577

("size", ctypes.c_uint)]

578

579

class _openpgp_crt_int(ctypes.Structure):

541

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

542

('size', ctypes.c_uint)]

543

class openpgp_crt_int(ctypes.Structure):

580

544

_fields_ = []

581

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

582

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

545

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

546

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

583

547

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

584

548

credentials_type_t = ctypes.c_int

585

549

transport_ptr_t = ctypes.c_void_p

586

550

close_request_t = ctypes.c_int

587

551

588

552

# Exceptions

589

553

class Error(Exception):

590

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

554

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

555

# exception might be raised from within GnuTLS.__init__,

556

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

557

# global variable has happened.

558

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

591

559

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

592

560

# code is passed, convert it to a string with

593

561

# gnutls.strerror()

594

562

self.code = code

595

563

if message is None and code is not None:

596

message = gnutls.strerror(code).decode(

597

"utf-8", errors="replace")

598

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

564

message = GnuTLS.strerror(code)

565

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

599

566

message, *args)

600

567

601

568

class CertificateSecurityError(Error):

602

569

pass

603

604

class PointerTo:

605

def __init__(self, cls):

606

self.cls = cls

607

608

def from_param(self, obj):

609

if not isinstance(obj, self.cls):

610

raise TypeError("Not of type {}: {!r}"

611

.format(self.cls.__name__, obj))

612

return ctypes.byref(obj.from_param(obj))

613

614

class CastToVoidPointer:

615

def __init__(self, cls):

616

self.cls = cls

617

618

def from_param(self, obj):

619

if not isinstance(obj, self.cls):

620

raise TypeError("Not of type {}: {!r}"

621

.format(self.cls.__name__, obj))

622

return ctypes.cast(obj.from_param(obj), ctypes.c_void_p)

623

624

class With_from_param:

625

@classmethod

626

def from_param(cls, obj):

627

return obj._as_parameter_

628

570

629

571

# Classes

630

class Credentials(With_from_param):

572

class Credentials(object):

631

573

def __init__(self):

632

self._as_parameter_ = gnutls.certificate_credentials_t()

633

gnutls.certificate_allocate_credentials(self)

574

self._c_object = gnutls.certificate_credentials_t()

575

gnutls.certificate_allocate_credentials(

576

ctypes.byref(self._c_object))

634

577

self.type = gnutls.CRD_CERTIFICATE

635

578

636

579

def __del__(self):

637

gnutls.certificate_free_credentials(self)

638

639

class ClientSession(With_from_param):

640

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

641

self._as_parameter_ = gnutls.session_t()

642

gnutls_flags = gnutls.CLIENT

643

if gnutls.check_version(b"3.5.6"):

644

gnutls_flags |= gnutls.NO_TICKETS

645

if gnutls.has_rawpk:

646

gnutls_flags |= gnutls.ENABLE_RAWPK

647

gnutls.init(self, gnutls_flags)

648

del gnutls_flags

649

gnutls.set_default_priority(self)

650

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

651

gnutls.handshake_set_private_extensions(self, True)

580

gnutls.certificate_free_credentials(self._c_object)

581

582

class ClientSession(object):

583

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

584

self._c_object = gnutls.session_t()

585

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

586

gnutls.set_default_priority(self._c_object)

587

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

588

gnutls.handshake_set_private_extensions(self._c_object,

589

True)

652

590

self.socket = socket

653

591

if credentials is None:

654

592

credentials = gnutls.Credentials()

655

gnutls.credentials_set(self, credentials.type,

656

credentials)

593

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

594

ctypes.cast(credentials._c_object,

595

ctypes.c_void_p))

657

596

self.credentials = credentials

658

597

659

598

def __del__(self):

660

gnutls.deinit(self)

661

599

gnutls.deinit(self._c_object)

600

662

601

def handshake(self):

663

return gnutls.handshake(self)

664

602

return gnutls.handshake(self._c_object)

603

665

604

def send(self, data):

666

605

data = bytes(data)

667

606

data_len = len(data)

668

607

while data_len > 0:

669

data_len -= gnutls.record_send(self, data[-data_len:],

608

data_len -= gnutls.record_send(self._c_object,

609

data[-data_len:],

670

610

data_len)

671

611

672

612

def bye(self):

673

return gnutls.bye(self, gnutls.SHUT_RDWR)

674

613

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

614

675

615

# Error handling functions

676

616

def _error_code(result):

677

617

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

678

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

679

if result >= gnutls.E_SUCCESS:

618

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

619

if result >= 0:

680

620

return result

681

621

if result == gnutls.E_NO_CERTIFICATE_FOUND:

682

raise gnutls.CertificateSecurityError(code=result)

683

raise gnutls.Error(code=result)

684

685

def _retry_on_error(result, func, arguments,

686

_error_code=_error_code):

622

raise gnutls.CertificateSecurityError(code = result)

623

raise gnutls.Error(code = result)

624

625

def _retry_on_error(result, func, arguments):

687

626

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

688

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

689

while result < gnutls.E_SUCCESS:

627

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

628

while result < 0:

690

629

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

691

630

return _error_code(result)

692

631

result = func(*arguments)

693

632

return result

694

633

695

634

# Unless otherwise indicated, the function declarations below are

696

635

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

697

636

698

637

# Functions

699

638

priority_set_direct = _library.gnutls_priority_set_direct

700

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

639

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

701

640

ctypes.POINTER(ctypes.c_char_p)]

702

641

priority_set_direct.restype = _error_code

703

642

704

643

init = _library.gnutls_init

705

init.argtypes = [PointerTo(ClientSession), ctypes.c_int]

644

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

706

645

init.restype = _error_code

707

646

708

647

set_default_priority = _library.gnutls_set_default_priority

709

set_default_priority.argtypes = [ClientSession]

648

set_default_priority.argtypes = [session_t]

710

649

set_default_priority.restype = _error_code

711

650

712

651

record_send = _library.gnutls_record_send

713

record_send.argtypes = [ClientSession, ctypes.c_void_p,

652

record_send.argtypes = [session_t, ctypes.c_void_p,

714

653

ctypes.c_size_t]

715

654

record_send.restype = ctypes.c_ssize_t

716

655

record_send.errcheck = _retry_on_error

717

656

718

657

certificate_allocate_credentials = (

719

658

_library.gnutls_certificate_allocate_credentials)

720

659

certificate_allocate_credentials.argtypes = [

721

PointerTo(Credentials)]

660

ctypes.POINTER(certificate_credentials_t)]

722

661

certificate_allocate_credentials.restype = _error_code

723

662

724

663

certificate_free_credentials = (

725

664

_library.gnutls_certificate_free_credentials)

726

certificate_free_credentials.argtypes = [Credentials]

665

certificate_free_credentials.argtypes = [certificate_credentials_t]

727

666

certificate_free_credentials.restype = None

728

667

729

668

handshake_set_private_extensions = (

730

669

_library.gnutls_handshake_set_private_extensions)

731

handshake_set_private_extensions.argtypes = [ClientSession,

670

handshake_set_private_extensions.argtypes = [session_t,

732

671

ctypes.c_int]

733

672

handshake_set_private_extensions.restype = None

734

673

735

674

credentials_set = _library.gnutls_credentials_set

736

credentials_set.argtypes = [ClientSession, credentials_type_t,

737

CastToVoidPointer(Credentials)]

675

credentials_set.argtypes = [session_t, credentials_type_t,

676

ctypes.c_void_p]

738

677

credentials_set.restype = _error_code

739

678

740

679

strerror = _library.gnutls_strerror

741

680

strerror.argtypes = [ctypes.c_int]

742

681

strerror.restype = ctypes.c_char_p

743

682

744

683

certificate_type_get = _library.gnutls_certificate_type_get

745

certificate_type_get.argtypes = [ClientSession]

684

certificate_type_get.argtypes = [session_t]

746

685

certificate_type_get.restype = _error_code

747

686

748

687

certificate_get_peers = _library.gnutls_certificate_get_peers

749

certificate_get_peers.argtypes = [ClientSession,

688

certificate_get_peers.argtypes = [session_t,

750

689

ctypes.POINTER(ctypes.c_uint)]

751

690

certificate_get_peers.restype = ctypes.POINTER(datum_t)

752

691

753

692

global_set_log_level = _library.gnutls_global_set_log_level

754

693

global_set_log_level.argtypes = [ctypes.c_int]

755

694

global_set_log_level.restype = None

756

695

757

696

global_set_log_function = _library.gnutls_global_set_log_function

758

697

global_set_log_function.argtypes = [log_func]

759

698

global_set_log_function.restype = None

760

699

761

700

deinit = _library.gnutls_deinit

762

deinit.argtypes = [ClientSession]

701

deinit.argtypes = [session_t]

763

702

deinit.restype = None

764

703

765

704

handshake = _library.gnutls_handshake

766

handshake.argtypes = [ClientSession]

767

handshake.restype = ctypes.c_int

705

handshake.argtypes = [session_t]

706

handshake.restype = _error_code

768

707

handshake.errcheck = _retry_on_error

769

708

770

709

transport_set_ptr = _library.gnutls_transport_set_ptr

771

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

710

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

772

711

transport_set_ptr.restype = None

773

712

774

713

bye = _library.gnutls_bye

775

bye.argtypes = [ClientSession, close_request_t]

776

bye.restype = ctypes.c_int

714

bye.argtypes = [session_t, close_request_t]

715

bye.restype = _error_code

777

716

bye.errcheck = _retry_on_error

778

717

779

718

check_version = _library.gnutls_check_version

780

719

check_version.argtypes = [ctypes.c_char_p]

781

720

check_version.restype = ctypes.c_char_p

782

783

_need_version = b"3.3.0"

784

if check_version(_need_version) is None:

785

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

786

.format(_need_version))

787

788

_tls_rawpk_version = b"3.6.6"

789

has_rawpk = bool(check_version(_tls_rawpk_version))

790

791

if has_rawpk:

792

# Types

793

class pubkey_st(ctypes.Structure):

794

_fields = []

795

pubkey_t = ctypes.POINTER(pubkey_st)

796

797

x509_crt_fmt_t = ctypes.c_int

798

799

# All the function declarations below are from

800

# gnutls/abstract.h

801

pubkey_init = _library.gnutls_pubkey_init

802

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

803

pubkey_init.restype = _error_code

804

805

pubkey_import = _library.gnutls_pubkey_import

806

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

807

x509_crt_fmt_t]

808

pubkey_import.restype = _error_code

809

810

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

811

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

812

ctypes.POINTER(ctypes.c_ubyte),

813

ctypes.POINTER(ctypes.c_size_t)]

814

pubkey_get_key_id.restype = _error_code

815

816

pubkey_deinit = _library.gnutls_pubkey_deinit

817

pubkey_deinit.argtypes = [pubkey_t]

818

pubkey_deinit.restype = None

819

else:

820

# All the function declarations below are from

821

# gnutls/openpgp.h

822

823

openpgp_crt_init = _library.gnutls_openpgp_crt_init

824

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

825

openpgp_crt_init.restype = _error_code

826

827

openpgp_crt_import = _library.gnutls_openpgp_crt_import

828

openpgp_crt_import.argtypes = [openpgp_crt_t,

829

ctypes.POINTER(datum_t),

830

openpgp_crt_fmt_t]

831

openpgp_crt_import.restype = _error_code

832

833

openpgp_crt_verify_self = \

834

_library.gnutls_openpgp_crt_verify_self

835

openpgp_crt_verify_self.argtypes = [

836

openpgp_crt_t,

837

ctypes.c_uint,

838

ctypes.POINTER(ctypes.c_uint),

839

]

840

openpgp_crt_verify_self.restype = _error_code

841

842

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

843

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

844

openpgp_crt_deinit.restype = None

845

846

openpgp_crt_get_fingerprint = (

847

_library.gnutls_openpgp_crt_get_fingerprint)

848

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

849

ctypes.c_void_p,

850

ctypes.POINTER(

851

ctypes.c_size_t)]

852

openpgp_crt_get_fingerprint.restype = _error_code

853

854

if check_version(b"3.6.4"):

855

certificate_type_get2 = _library.gnutls_certificate_type_get2

856

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

857

certificate_type_get2.restype = _error_code

858

721

722

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

723

724

openpgp_crt_init = _library.gnutls_openpgp_crt_init

725

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

726

openpgp_crt_init.restype = _error_code

727

728

openpgp_crt_import = _library.gnutls_openpgp_crt_import

729

openpgp_crt_import.argtypes = [openpgp_crt_t,

730

ctypes.POINTER(datum_t),

731

openpgp_crt_fmt_t]

732

openpgp_crt_import.restype = _error_code

733

734

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

735

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

736

ctypes.POINTER(ctypes.c_uint)]

737

openpgp_crt_verify_self.restype = _error_code

738

739

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

740

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

741

openpgp_crt_deinit.restype = None

742

743

openpgp_crt_get_fingerprint = (

744

_library.gnutls_openpgp_crt_get_fingerprint)

745

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

746

ctypes.c_void_p,

747

ctypes.POINTER(

748

ctypes.c_size_t)]

749

openpgp_crt_get_fingerprint.restype = _error_code

750

859

751

# Remove non-public functions

860

752

del _error_code, _retry_on_error

861

753

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

754

gnutls = GnuTLS()

862

755

863

756

def call_pipe(connection, # : multiprocessing.Connection

864

757

func, *args, **kwargs):

865

758

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

866

759

867

760

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

868

761

return value on the provided multiprocessing.Connection.

869

762

"""

870

763

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

871

764

connection.close()

872

765

873

874

class Client:

766

class Client(object):

875

767

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

876

768

877

769

Attributes:

878

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

770

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

879

771

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

880

772

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

881

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

882

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

883

running.

773

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

774

to see if the client lives.

775

'None' if no process is running.

884

776

checker_callback_tag: a GLib event source tag, or None

885

777

checker_command: string; External command which is run to check

886

778

if client lives. %() expansions are done at

894

786

disable_initiator_tag: a GLib event source tag, or None

895

787

enabled: bool()

896

788

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

897

uniquely identify an OpenPGP client

898

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

899

a client using raw public keys

789

uniquely identify the client

900

790

host: string; available for use by the checker command

901

791

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

902

792

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

918

808

disabled, or None

919

809

server_settings: The server_settings dict from main()

920

810

"""

921

811

922

812

runtime_expansions = ("approval_delay", "approval_duration",

923

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

813

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

924

814

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

925

815

"last_approval_request", "last_checked_ok",

926

816

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

935

825

"approved_by_default": "True",

936

826

"enabled": "True",

937

827

}

938

828

939

829

@staticmethod

940

830

def config_parser(config):

941

831

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

948

838

for client_name in config.sections():

949

839

section = dict(config.items(client_name))

950

840

client = settings[client_name] = {}

951

841

952

842

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

953

843

# Reformat values from string types to Python types

954

844

client["approved_by_default"] = config.getboolean(

955

845

client_name, "approved_by_default")

956

846

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

957

847

"enabled")

958

959

# Uppercase and remove spaces from key_id and fingerprint

960

# for later comparison purposes with return value from the

961

# key_id() and fingerprint() functions

962

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

963

.replace(" ", ""))

848

849

# Uppercase and remove spaces from fingerprint for later

850

# comparison purposes with return value from the

851

# fingerprint() function

964

852

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

965

853

.replace(" ", ""))

966

854

if "secret" in section:

987

875

client["last_approval_request"] = None

988

876

client["last_checked_ok"] = None

989

877

client["last_checker_status"] = -2

990

878

991

879

return settings

992

993

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

880

881

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

994

882

self.name = name

995

883

if server_settings is None:

996

884

server_settings = {}

998

886

# adding all client settings

999

887

for setting, value in settings.items():

1000

888

setattr(self, setting, value)

1001

889

1002

890

if self.enabled:

1003

891

if not hasattr(self, "last_enabled"):

1004

892

self.last_enabled = datetime.datetime.utcnow()

1008

896

else:

1009

897

self.last_enabled = None

1010

898

self.expires = None

1011

1012

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

1013

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

1014

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

899

900

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

901

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

1015

902

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

1016

903

datetime.datetime.utcnow())

1017

904

1018

905

# attributes specific for this server instance

1019

906

self.checker = None

1020

907

self.checker_initiator_tag = None

1029

916

for attr in self.__dict__.keys()

1030

917

if not attr.startswith("_")]

1031

918

self.client_structure.append("client_structure")

1032

919

1033

920

for name, t in inspect.getmembers(

1034

921

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

1035

922

if not name.startswith("_"):

1036

923

self.client_structure.append(name)

1037

924

1038

925

# Send notice to process children that client state has changed

1039

926

def send_changedstate(self):

1040

927

with self.changedstate:

1041

928

self.changedstate.notify_all()

1042

929

1043

930

def enable(self):

1044

931

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

1045

932

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

1050

937

self.last_enabled = datetime.datetime.utcnow()

1051

938

self.init_checker()

1052

939

self.send_changedstate()

1053

940

1054

941

def disable(self, quiet=True):

1055

942

"""Disable this client."""

1056

943

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

1057

944

return False

1058

945

if not quiet:

1059

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

946

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

1060

947

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

1061

948

GLib.source_remove(self.disable_initiator_tag)

1062

949

self.disable_initiator_tag = None

1070

957

self.send_changedstate()

1071

958

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

1072

959

return False

1073

960

1074

961

def __del__(self):

1075

962

self.disable()

1076

963

1077

964

def init_checker(self):

1078

965

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

1079

966

# and every interval from then on.

1080

967

if self.checker_initiator_tag is not None:

1081

968

GLib.source_remove(self.checker_initiator_tag)

1082

969

self.checker_initiator_tag = GLib.timeout_add(

1083

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

1084

+ 1)),

970

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

1085

971

self.start_checker)

1086

972

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

1087

973

if self.disable_initiator_tag is not None:

1090

976

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

1091

977

# Also start a new checker *right now*.

1092

978

self.start_checker()

1093

979

1094

980

def checker_callback(self, source, condition, connection,

1095

981

command):

1096

982

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

983

self.checker_callback_tag = None

984

self.checker = None

1097

985

# Read return code from connection (see call_pipe)

1098

986

returncode = connection.recv()

1099

987

connection.close()

1100

if self.checker is not None:

1101

self.checker.join()

1102

self.checker_callback_tag = None

1103

self.checker = None

1104

988

1105

989

if returncode >= 0:

1106

990

self.last_checker_status = returncode

1107

991

self.last_checker_signal = None

1108

992

if self.last_checker_status == 0:

1109

log.info("Checker for %(name)s succeeded", vars(self))

993

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

994

vars(self))

1110

995

self.checked_ok()

1111

996

else:

1112

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

997

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

1113

998

else:

1114

999

self.last_checker_status = -1

1115

1000

self.last_checker_signal = -returncode

1116

log.warning("Checker for %(name)s crashed?", vars(self))

1001

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

1002

vars(self))

1117

1003

return False

1118

1004

1119

1005

def checked_ok(self):

1120

1006

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

1121

1007

self.last_checked_ok = datetime.datetime.utcnow()

1122

1008

self.last_checker_status = 0

1123

1009

self.last_checker_signal = None

1124

1010

self.bump_timeout()

1125

1011

1126

1012

def bump_timeout(self, timeout=None):

1127

1013

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

1128

1014

if timeout is None:

1134

1020

self.disable_initiator_tag = GLib.timeout_add(

1135

1021

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

1136

1022

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

1137

1023

1138

1024

def need_approval(self):

1139

1025

self.last_approval_request = datetime.datetime.utcnow()

1140

1026

1141

1027

def start_checker(self):

1142

1028

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

1143

1029

1144

1030

If a checker already exists, leave it running and do

1145

1031

nothing."""

1146

1032

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

1151

1037

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

1152

1038

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

1153

1039

# should be.

1154

1040

1155

1041

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

1156

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

1042

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

1157

1043

self.checker.join()

1158

1044

self.checker = None

1159

1045

# Start a new checker if needed

1160

1046

if self.checker is None:

1161

1047

# Escape attributes for the shell

1162

1048

escaped_attrs = {

1163

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

1164

for attr in self.runtime_expansions}

1049

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

1050

for attr in self.runtime_expansions }

1165

1051

try:

1166

1052

command = self.checker_command % escaped_attrs

1167

1053

except TypeError as error:

1168

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

1169

self.checker_command, exc_info=error)

1054

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

1055

self.checker_command,

1056

exc_info=error)

1170

1057

return True # Try again later

1171

1058

self.current_checker_command = command

1172

log.info("Starting checker %r for %s", command, self.name)

1059

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

1060

self.name)

1173

1061

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

1174

1062

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

1175

1063

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

1177

1065

# The exception is when not debugging but nevertheless

1178

1066

# running in the foreground; use the previously

1179

1067

# created wnull.

1180

popen_args = {"close_fds": True,

1181

"shell": True,

1182

"cwd": "/"}

1068

popen_args = { "close_fds": True,

1069

"shell": True,

1070

"cwd": "/" }

1183

1071

if (not self.server_settings["debug"]

1184

1072

and self.server_settings["foreground"]):

1185

1073

popen_args.update({"stdout": wnull,

1186

"stderr": wnull})

1187

pipe = multiprocessing.Pipe(duplex=False)

1074

"stderr": wnull })

1075

pipe = multiprocessing.Pipe(duplex = False)

1188

1076

self.checker = multiprocessing.Process(

1189

target=call_pipe,

1190

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

1191

kwargs=popen_args)

1077

target = call_pipe,

1078

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

1079

kwargs = popen_args)

1192

1080

self.checker.start()

1193

1081

self.checker_callback_tag = GLib.io_add_watch(

1194

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

1195

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1082

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

1196

1083

self.checker_callback, pipe[0], command)

1197

1084

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

1198

1085

return True

1199

1086

1200

1087

def stop_checker(self):

1201

1088

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

1202

1089

if self.checker_callback_tag:

1204

1091

self.checker_callback_tag = None

1205

1092

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

1206

1093

return

1207

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

1094

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

1208

1095

self.checker.terminate()

1209

1096

self.checker = None

1210

1097

1215

1102

byte_arrays=False):

1216

1103

"""Decorators for marking methods of a DBusObjectWithProperties to

1217

1104

become properties on the D-Bus.

1218

1105

1219

1106

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

1220

1107

and with one argument by "Set".

1221

1108

1222

1109

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

1223

1110

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

1224

1111

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

1228

1115

if byte_arrays and signature != "ay":

1229

1116

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

1230

1117

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

1231

1118

1232

1119

def decorator(func):

1233

1120

func._dbus_is_property = True

1234

1121

func._dbus_interface = dbus_interface

1237

1124

func._dbus_name = func.__name__

1238

1125

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

1239

1126

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

1240

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1127

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1241

1128

return func

1242

1129

1243

1130

return decorator

1244

1131

1245

1132

1246

1133

def dbus_interface_annotations(dbus_interface):

1247

1134

"""Decorator for marking functions returning interface annotations

1248

1135

1249

1136

Usage:

1250

1137

1251

1138

@dbus_interface_annotations("org.example.Interface")

1252

1139

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

1253

1140

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

1254

1141

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

1255

1142

"false"}

1256

1143

"""

1257

1144

1258

1145

def decorator(func):

1259

1146

func._dbus_is_interface = True

1260

1147

func._dbus_interface = dbus_interface

1261

1148

func._dbus_name = dbus_interface

1262

1149

return func

1263

1150

1264

1151

return decorator

1265

1152

1266

1153

1267

1154

def dbus_annotations(annotations):

1268

1155

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

1269

1156

Usage:

1270

1157

1271

1158

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

1272

1159

"org.freedesktop.DBus.Property."

1273

1160

"EmitsChangedSignal": "false"})

1275

1162

access="r")

1276

1163

def Property_dbus_property(self):

1277

1164

return dbus.Boolean(False)

1278

1165

1279

1166

See also the DBusObjectWithAnnotations class.

1280

1167

"""

1281

1168

1282

1169

def decorator(func):

1283

1170

func._dbus_annotations = annotations

1284

1171

return func

1285

1172

1286

1173

return decorator

1287

1174

1288

1175

1306

1193

1307

1194

class DBusObjectWithAnnotations(dbus.service.Object):

1308

1195

"""A D-Bus object with annotations.

1309

1196

1310

1197

Classes inheriting from this can use the dbus_annotations

1311

1198

decorator to add annotations to methods or signals.

1312

1199

"""

1313

1200

1314

1201

@staticmethod

1315

1202

def _is_dbus_thing(thing):

1316

1203

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

1317

1204

1318

1205

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

1319

1206

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

1320

1207

"""

1321

1208

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

1322

1209

False)

1323

1210

1324

1211

def _get_all_dbus_things(self, thing):

1325

1212

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

1326

1213

"""

1329

1216

for cls in self.__class__.__mro__

1330

1217

for name, athing in

1331

1218

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

1332

1219

1333

1220

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1334

out_signature="s",

1335

path_keyword="object_path",

1336

connection_keyword="connection")

1221

out_signature = "s",

1222

path_keyword = 'object_path',

1223

connection_keyword = 'connection')

1337

1224

def Introspect(self, object_path, connection):

1338

1225

"""Overloading of standard D-Bus method.

1339

1226

1340

1227

Inserts annotation tags on methods and signals.

1341

1228

"""

1342

1229

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

1343

1230

connection)

1344

1231

try:

1345

1232

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

1346

1233

1347

1234

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

1348

1235

# Add annotation tags

1349

1236

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

1376

1263

if_tag.appendChild(ann_tag)

1377

1264

# Fix argument name for the Introspect method itself

1378

1265

if (if_tag.getAttribute("name")

1379

== dbus.INTROSPECTABLE_IFACE):

1266

== dbus.INTROSPECTABLE_IFACE):

1380

1267

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

1381

1268

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

1382

1269

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

1388

1275

document.unlink()

1389

1276

except (AttributeError, xml.dom.DOMException,

1390

1277

xml.parsers.expat.ExpatError) as error:

1391

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

1392

exc_info=error)

1278

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

1279

exc_info=error)

1393

1280

return xmlstring

1394

1281

1395

1282

1396

1283

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1397

1284

"""A D-Bus object with properties.

1398

1285

1399

1286

Classes inheriting from this can use the dbus_service_property

1400

1287

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

1401

1288

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

1402

1289

"""

1403

1290

1404

1291

def _get_dbus_property(self, interface_name, property_name):

1405

1292

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

1406

1293

property with the specified name and interface.

1411

1298

if (value._dbus_name == property_name

1412

1299

and value._dbus_interface == interface_name):

1413

1300

return value.__get__(self)

1414

1301

1415

1302

# No such property

1416

1303

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

1417

1304

self.dbus_object_path, interface_name, property_name))

1418

1305

1419

1306

@classmethod

1420

1307

def _get_all_interface_names(cls):

1421

1308

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

1424

1311

for x in (inspect.getmro(cls))

1425

1312

for attr in dir(x))

1426

1313

if name is not None)

1427

1314

1428

1315

@dbus.service.method(dbus.PROPERTIES_IFACE,

1429

1316

in_signature="ss",

1430

1317

out_signature="v")

1438

1325

if not hasattr(value, "variant_level"):

1439

1326

return value

1440

1327

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

1441

1328

1442

1329

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

1443

1330

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

1444

1331

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

1453

1340

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

1454

1341

"'ay' signature {!r}"

1455

1342

.format(prop._dbus_signature))

1456

value = dbus.ByteArray(bytes(value))

1343

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

1344

for byte in value))

1457

1345

prop(value)

1458

1346

1459

1347

@dbus.service.method(dbus.PROPERTIES_IFACE,

1460

1348

in_signature="s",

1461

1349

out_signature="a{sv}")

1462

1350

def GetAll(self, interface_name):

1463

1351

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

1464

1352

standard.

1465

1353

1466

1354

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

1467

1355

"""

1468

1356

properties = {}

1479

1367

properties[name] = value

1480

1368

continue

1481

1369

properties[name] = type(value)(

1482

value, variant_level=value.variant_level + 1)

1370

value, variant_level = value.variant_level + 1)

1483

1371

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

1484

1372

1485

1373

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

1486

1374

def PropertiesChanged(self, interface_name, changed_properties,

1487

1375

invalidated_properties):

1489

1377

standard.

1490

1378

"""

1491

1379

pass

1492

1380

1493

1381

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1494

1382

out_signature="s",

1495

path_keyword="object_path",

1496

connection_keyword="connection")

1383

path_keyword='object_path',

1384

connection_keyword='connection')

1497

1385

def Introspect(self, object_path, connection):

1498

1386

"""Overloading of standard D-Bus method.

1499

1387

1500

1388

Inserts property tags and interface annotation tags.

1501

1389

"""

1502

1390

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1504

1392

connection)

1505

1393

try:

1506

1394

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

1507

1395

1508

1396

def make_tag(document, name, prop):

1509

1397

e = document.createElement("property")

1510

1398

e.setAttribute("name", name)

1511

1399

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

1512

1400

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

1513

1401

return e

1514

1402

1515

1403

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

1516

1404

# Add property tags

1517

1405

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

1555

1443

document.unlink()

1556

1444

except (AttributeError, xml.dom.DOMException,

1557

1445

xml.parsers.expat.ExpatError) as error:

1558

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

1559

exc_info=error)

1446

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

1447

exc_info=error)

1560

1448

return xmlstring

1561

1449

1562

1563

1450

try:

1564

1451

dbus.OBJECT_MANAGER_IFACE

1565

1452

except AttributeError:

1566

1453

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

1567

1454

1568

1569

1455

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1570

1456

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

1571

1457

1572

1458

Classes inheriting from this exposes the standard

1573

1459

GetManagedObjects call and the InterfacesAdded and

1574

1460

InterfacesRemoved signals on the standard

1575

1461

"org.freedesktop.DBus.ObjectManager" interface.

1576

1462

1577

1463

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

1578

1464

manually.

1579

1465

"""

1580

1466

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1581

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

1467

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

1582

1468

def GetManagedObjects(self):

1583

1469

"""This function must be overridden"""

1584

1470

raise NotImplementedError()

1585

1471

1586

1472

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1587

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

1473

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

1588

1474

def InterfacesAdded(self, object_path, interfaces_and_properties):

1589

1475

pass

1590

1591

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

1476

1477

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

1592

1478

def InterfacesRemoved(self, object_path, interfaces):

1593

1479

pass

1594

1480

1595

1481

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1596

out_signature="s",

1597

path_keyword="object_path",

1598

connection_keyword="connection")

1482

out_signature = "s",

1483

path_keyword = 'object_path',

1484

connection_keyword = 'connection')

1599

1485

def Introspect(self, object_path, connection):

1600

1486

"""Overloading of standard D-Bus method.

1601

1487

1602

1488

Override return argument name of GetManagedObjects to be

1603

1489

"objpath_interfaces_and_properties"

1604

1490

"""

1607

1493

connection)

1608

1494

try:

1609

1495

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

1610

1496

1611

1497

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

1612

1498

# Fix argument name for the GetManagedObjects method

1613

1499

if (if_tag.getAttribute("name")

1614

== dbus.OBJECT_MANAGER_IFACE):

1500

== dbus.OBJECT_MANAGER_IFACE):

1615

1501

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

1616

1502

if (cn.getAttribute("name")

1617

1503

== "GetManagedObjects"):

1626

1512

document.unlink()

1627

1513

except (AttributeError, xml.dom.DOMException,

1628

1514

xml.parsers.expat.ExpatError) as error:

1629

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

1630

exc_info=error)

1515

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

1516

exc_info = error)

1631

1517

return xmlstring

1632

1518

1633

1634

1519

def datetime_to_dbus(dt, variant_level=0):

1635

1520

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

1636

1521

if dt is None:

1637

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

1522

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

1638

1523

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

1639

1524

1640

1525

1643

1528

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

1644

1529

interface names according to the "alt_interface_names" mapping.

1645

1530

Usage:

1646

1531

1647

1532

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

1648

1533

"net.example.AlternateInterface"})

1649

1534

class SampleDBusObject(dbus.service.Object):

1650

1535

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

1651

1536

def SampleDBusMethod():

1652

1537

pass

1653

1538

1654

1539

The above "SampleDBusMethod" on "SampleDBusObject" will be

1655

1540

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

1656

1541

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

1657

1542

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

1658

1543

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

1659

1544

1660

1545

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

1661

1546

(from DBusObjectWithProperties) and interfaces (from the

1662

1547

dbus_interface_annotations decorator).

1663

1548

"""

1664

1549

1665

1550

def wrapper(cls):

1666

1551

for orig_interface_name, alt_interface_name in (

1667

1552

alt_interface_names.items()):

1707

1592

attribute._dbus_annotations)

1708

1593

except AttributeError:

1709

1594

pass

1710

1711

1595

# Define a creator of a function to call both the

1712

1596

# original and alternate functions, so both the

1713

1597

# original and alternate signals gets sent when

1716

1600

"""This function is a scope container to pass

1717

1601

func1 and func2 to the "call_both" function

1718

1602

outside of its arguments"""

1719

1603

1720

1604

@functools.wraps(func2)

1721

1605

def call_both(*args, **kwargs):

1722

1606

"""This function will emit two D-Bus

1723

1607

signals by calling func1 and func2"""

1724

1608

func1(*args, **kwargs)

1725

1609

func2(*args, **kwargs)

1726

# Make wrapper function look like a D-Bus

1727

# signal

1610

# Make wrapper function look like a D-Bus signal

1728

1611

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

1729

1612

if name.startswith("_dbus_"):

1730

1613

setattr(call_both, name, attr)

1731

1614

1732

1615

return call_both

1733

1616

# Create the "call_both" function and add it to

1734

1617

# the class

1780

1663

(copy_function(attribute)))

1781

1664

if deprecate:

1782

1665

# Deprecate all alternate interfaces

1783

iname = "_AlternateDBusNames_interface_annotation{}"

1666

iname="_AlternateDBusNames_interface_annotation{}"

1784

1667

for interface_name in interface_names:

1785

1668

1786

1669

@dbus_interface_annotations(interface_name)

1787

1670

def func(self):

1788

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

1789

"true"}

1671

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

1672

"true" }

1790

1673

# Find an unused name

1791

1674

for aname in (iname.format(i)

1792

1675

for i in itertools.count()):

1803

1686

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

1804

1687

(cls, ), attr)

1805

1688

return cls

1806

1689

1807

1690

return wrapper

1808

1691

1809

1692

1811

1694

"se.bsnet.fukt.Mandos"})

1812

1695

class ClientDBus(Client, DBusObjectWithProperties):

1813

1696

"""A Client class using D-Bus

1814

1697

1815

1698

Attributes:

1816

1699

dbus_object_path: dbus.ObjectPath

1817

1700

bus: dbus.SystemBus()

1818

1701

"""

1819

1702

1820

1703

runtime_expansions = (Client.runtime_expansions

1821

1704

+ ("dbus_object_path", ))

1822

1705

1823

1706

_interface = "se.recompile.Mandos.Client"

1824

1707

1825

1708

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

1826

1827

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

1709

1710

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

1828

1711

self.bus = bus

1829

1712

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

1830

1713

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

1836

1719

"/clients/" + client_object_name)

1837

1720

DBusObjectWithProperties.__init__(self, self.bus,

1838

1721

self.dbus_object_path)

1839

1722

1840

1723

def notifychangeproperty(transform_func, dbus_name,

1841

1724

type_func=lambda x: x,

1842

1725

variant_level=1,

1844

1727

_interface=_interface):

1845

1728

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

1846

1729

its changes to DBus.

1847

1730

1848

1731

transform_fun: Function that takes a value and a variant_level

1849

1732

and transforms it to a D-Bus type.

1850

1733

dbus_name: D-Bus name of the variable

1853

1736

variant_level: D-Bus variant level. Default: 1

1854

1737

"""

1855

1738

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

1856

1739

1857

1740

def setter(self, value):

1858

1741

if hasattr(self, "dbus_object_path"):

1859

1742

if (not hasattr(self, attrname) or

1866

1749

else:

1867

1750

dbus_value = transform_func(

1868

1751

type_func(value),

1869

variant_level=variant_level)

1752

variant_level = variant_level)

1870

1753

self.PropertyChanged(dbus.String(dbus_name),

1871

1754

dbus_value)

1872

1755

self.PropertiesChanged(

1873

1756

_interface,

1874

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

1875

dbus_value}),

1757

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

1758

dbus_value }),

1876

1759

dbus.Array())

1877

1760

setattr(self, attrname, value)

1878

1761

1879

1762

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

1880

1763

1881

1764

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1882

1765

approvals_pending = notifychangeproperty(dbus.Boolean,

1883

1766

"ApprovalPending",

1884

type_func=bool)

1767

type_func = bool)

1885

1768

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

1886

1769

last_enabled = notifychangeproperty(datetime_to_dbus,

1887

1770

"LastEnabled")

1888

1771

checker = notifychangeproperty(

1889

1772

dbus.Boolean, "CheckerRunning",

1890

type_func=lambda checker: checker is not None)

1773

type_func = lambda checker: checker is not None)

1891

1774

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1892

1775

"LastCheckedOK")

1893

1776

last_checker_status = notifychangeproperty(dbus.Int16,

1898

1781

"ApprovedByDefault")

1899

1782

approval_delay = notifychangeproperty(

1900

1783

dbus.UInt64, "ApprovalDelay",

1901

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

1784

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

1902

1785

approval_duration = notifychangeproperty(

1903

1786

dbus.UInt64, "ApprovalDuration",

1904

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

1787

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

1905

1788

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

1906

1789

timeout = notifychangeproperty(

1907

1790

dbus.UInt64, "Timeout",

1908

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

1791

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

1909

1792

extended_timeout = notifychangeproperty(

1910

1793

dbus.UInt64, "ExtendedTimeout",

1911

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

1794

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

1912

1795

interval = notifychangeproperty(

1913

1796

dbus.UInt64, "Interval",

1914

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

1797

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

1915

1798

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

1916

1799

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

1917

1800

invalidate_only=True)

1918

1801

1919

1802

del notifychangeproperty

1920

1803

1921

1804

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

1922

1805

try:

1923

1806

self.remove_from_connection()

1926

1809

if hasattr(DBusObjectWithProperties, "__del__"):

1927

1810

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

1928

1811

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

1929

1812

1930

1813

def checker_callback(self, source, condition,

1931

1814

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

1932

1815

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

1948

1831

| self.last_checker_signal),

1949

1832

dbus.String(command))

1950

1833

return ret

1951

1834

1952

1835

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

1953

1836

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

1954

1837

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

1958

1841

# Emit D-Bus signal

1959

1842

self.CheckerStarted(self.current_checker_command)

1960

1843

return r

1961

1844

1962

1845

def _reset_approved(self):

1963

1846

self.approved = None

1964

1847

return False

1965

1848

1966

1849

def approve(self, value=True):

1967

1850

self.approved = value

1968

1851

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

1969

1852

* 1000), self._reset_approved)

1970

1853

self.send_changedstate()

1971

1972

# D-Bus methods, signals & properties

1973

1974

# Interfaces

1975

1976

# Signals

1977

1854

1855

## D-Bus methods, signals & properties

1856

1857

## Interfaces

1858

1859

## Signals

1860

1978

1861

# CheckerCompleted - signal

1979

1862

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

1980

1863

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

1981

1864

"D-Bus signal"

1982

1865

pass

1983

1866

1984

1867

# CheckerStarted - signal

1985

1868

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

1986

1869

def CheckerStarted(self, command):

1987

1870

"D-Bus signal"

1988

1871

pass

1989

1872

1990

1873

# PropertyChanged - signal

1991

1874

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

1992

1875

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

1993

1876

def PropertyChanged(self, property, value):

1994

1877

"D-Bus signal"

1995

1878

pass

1996

1879

1997

1880

# GotSecret - signal

1998

1881

@dbus.service.signal(_interface)

1999

1882

def GotSecret(self):

2002

1885

server to mandos-client

2003

1886

"""

2004

1887

pass

2005

1888

2006

1889

# Rejected - signal

2007

1890

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

2008

1891

def Rejected(self, reason):

2009

1892

"D-Bus signal"

2010

1893

pass

2011

1894

2012

1895

# NeedApproval - signal

2013

1896

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

2014

1897

def NeedApproval(self, timeout, default):

2015

1898

"D-Bus signal"

2016

1899

return self.need_approval()

2017

2018

# Methods

2019

1900

1901

## Methods

1902

2020

1903

# Approve - method

2021

1904

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

2022

1905

def Approve(self, value):

2023

1906

self.approve(value)

2024

1907

2025

1908

# CheckedOK - method

2026

1909

@dbus.service.method(_interface)

2027

1910

def CheckedOK(self):

2028

1911

self.checked_ok()

2029

1912

2030

1913

# Enable - method

2031

1914

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

2032

1915

@dbus.service.method(_interface)

2033

1916

def Enable(self):

2034

1917

"D-Bus method"

2035

1918

self.enable()

2036

1919

2037

1920

# StartChecker - method

2038

1921

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

2039

1922

@dbus.service.method(_interface)

2040

1923

def StartChecker(self):

2041

1924

"D-Bus method"

2042

1925

self.start_checker()

2043

1926

2044

1927

# Disable - method

2045

1928

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

2046

1929

@dbus.service.method(_interface)

2047

1930

def Disable(self):

2048

1931

"D-Bus method"

2049

1932

self.disable()

2050

1933

2051

1934

# StopChecker - method

2052

1935

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

2053

1936

@dbus.service.method(_interface)

2054

1937

def StopChecker(self):

2055

1938

self.stop_checker()

2056

2057

# Properties

2058

1939

1940

## Properties

1941

2059

1942

# ApprovalPending - property

2060

1943

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

2061

1944

def ApprovalPending_dbus_property(self):

2062

1945

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

2063

1946

2064

1947

# ApprovedByDefault - property

2065

1948

@dbus_service_property(_interface,

2066

1949

signature="b",

2069

1952

if value is None: # get

2070

1953

return dbus.Boolean(self.approved_by_default)

2071

1954

self.approved_by_default = bool(value)

2072

1955

2073

1956

# ApprovalDelay - property

2074

1957

@dbus_service_property(_interface,

2075

1958

signature="t",

2079

1962

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

2080

1963

* 1000)

2081

1964

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

2082

1965

2083

1966

# ApprovalDuration - property

2084

1967

@dbus_service_property(_interface,

2085

1968

signature="t",

2089

1972

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

2090

1973

* 1000)

2091

1974

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

2092

1975

2093

1976

# Name - property

2094

1977

@dbus_annotations(

2095

1978

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

2096

1979

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

2097

1980

def Name_dbus_property(self):

2098

1981

return dbus.String(self.name)

2099

2100

# KeyID - property

2101

@dbus_annotations(

2102

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

2103

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

2104

def KeyID_dbus_property(self):

2105

return dbus.String(self.key_id)

2106

1982

2107

1983

# Fingerprint - property

2108

1984

@dbus_annotations(

2109

1985

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

2110

1986

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

2111

1987

def Fingerprint_dbus_property(self):

2112

1988

return dbus.String(self.fingerprint)

2113

1989

2114

1990

# Host - property

2115

1991

@dbus_service_property(_interface,

2116

1992

signature="s",

2119

1995

if value is None: # get

2120

1996

return dbus.String(self.host)

2121

1997

self.host = str(value)

2122

1998

2123

1999

# Created - property

2124

2000

@dbus_annotations(

2125

2001

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

2126

2002

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

2127

2003

def Created_dbus_property(self):

2128

2004

return datetime_to_dbus(self.created)

2129

2005

2130

2006

# LastEnabled - property

2131

2007

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

2132

2008

def LastEnabled_dbus_property(self):

2133

2009

return datetime_to_dbus(self.last_enabled)

2134

2010

2135

2011

# Enabled - property

2136

2012

@dbus_service_property(_interface,

2137

2013

signature="b",

2143

2019

self.enable()

2144

2020

else:

2145

2021

self.disable()

2146

2022

2147

2023

# LastCheckedOK - property

2148

2024

@dbus_service_property(_interface,

2149

2025

signature="s",

2153

2029

self.checked_ok()

2154

2030

return

2155

2031

return datetime_to_dbus(self.last_checked_ok)

2156

2032

2157

2033

# LastCheckerStatus - property

2158

2034

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

2159

2035

def LastCheckerStatus_dbus_property(self):

2160

2036

return dbus.Int16(self.last_checker_status)

2161

2037

2162

2038

# Expires - property

2163

2039

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

2164

2040

def Expires_dbus_property(self):

2165

2041

return datetime_to_dbus(self.expires)

2166

2042

2167

2043

# LastApprovalRequest - property

2168

2044

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

2169

2045

def LastApprovalRequest_dbus_property(self):

2170

2046

return datetime_to_dbus(self.last_approval_request)

2171

2047

2172

2048

# Timeout - property

2173

2049

@dbus_service_property(_interface,

2174

2050

signature="t",

2193

2069

self.disable_initiator_tag = GLib.timeout_add(

2194

2070

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

2195

2071

self.disable)

2196

2072

2197

2073

# ExtendedTimeout - property

2198

2074

@dbus_service_property(_interface,

2199

2075

signature="t",

2203

2079

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

2204

2080

* 1000)

2205

2081

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

2206

2082

2207

2083

# Interval - property

2208

2084

@dbus_service_property(_interface,

2209

2085

signature="t",

2219

2095

GLib.source_remove(self.checker_initiator_tag)

2220

2096

self.checker_initiator_tag = GLib.timeout_add(

2221

2097

value, self.start_checker)

2222

self.start_checker() # Start one now, too

2223

2098

self.start_checker() # Start one now, too

2099

2224

2100

# Checker - property

2225

2101

@dbus_service_property(_interface,

2226

2102

signature="s",

2229

2105

if value is None: # get

2230

2106

return dbus.String(self.checker_command)

2231

2107

self.checker_command = str(value)

2232

2108

2233

2109

# CheckerRunning - property

2234

2110

@dbus_service_property(_interface,

2235

2111

signature="b",

2241

2117

self.start_checker()

2242

2118

else:

2243

2119

self.stop_checker()

2244

2120

2245

2121

# ObjectPath - property

2246

2122

@dbus_annotations(

2247

2123

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

2248

2124

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

2249

2125

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

2250

2126

def ObjectPath_dbus_property(self):

2251

return self.dbus_object_path # is already a dbus.ObjectPath

2252

2127

return self.dbus_object_path # is already a dbus.ObjectPath

2128

2253

2129

# Secret = property

2254

2130

@dbus_annotations(

2255

2131

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

2260

2136

byte_arrays=True)

2261

2137

def Secret_dbus_property(self, value):

2262

2138

self.secret = bytes(value)

2263

2139

2264

2140

del _interface

2265

2141

2266

2142

2267

class ProxyClient:

2268

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

2143

class ProxyClient(object):

2144

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

2269

2145

self._pipe = child_pipe

2270

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

2146

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

2271

2147

if not self._pipe.recv():

2272

raise KeyError(key_id or fpr)

2273

2148

raise KeyError(fpr)

2149

2274

2150

def __getattribute__(self, name):

2275

if name == "_pipe":

2151

if name == '_pipe':

2276

2152

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

2277

self._pipe.send(("getattr", name))

2153

self._pipe.send(('getattr', name))

2278

2154

data = self._pipe.recv()

2279

if data[0] == "data":

2155

if data[0] == 'data':

2280

2156

return data[1]

2281

if data[0] == "function":

2282

2157

if data[0] == 'function':

2158

2283

2159

def func(*args, **kwargs):

2284

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

2160

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

2285

2161

return self._pipe.recv()[1]

2286

2162

2287

2163

return func

2288

2164

2289

2165

def __setattr__(self, name, value):

2290

if name == "_pipe":

2166

if name == '_pipe':

2291

2167

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

2292

self._pipe.send(("setattr", name, value))

2168

self._pipe.send(('setattr', name, value))

2293

2169

2294

2170

2295

2171

class ClientHandler(socketserver.BaseRequestHandler, object):

2296

2172

"""A class to handle client connections.

2297

2173

2298

2174

Instantiated once for each connection to handle it.

2299

2175

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

2300

2176

2301

2177

def handle(self):

2302

2178

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

2303

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

2304

str(self.client_address))

2305

log.debug("Pipe FD: %d", self.server.child_pipe.fileno())

2306

2179

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

2180

str(self.client_address))

2181

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

2182

self.server.child_pipe.fileno())

2183

2307

2184

session = gnutls.ClientSession(self.request)

2308

2309

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

2310

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

2311

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

2312

# "+DHE-DSS"))

2185

2186

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

2187

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

2188

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

2189

# "+DHE-DSS"))

2313

2190

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

2314

2191

priority = self.server.gnutls_priority

2315

2192

if priority is None:

2316

2193

priority = "NORMAL"

2317

gnutls.priority_set_direct(session,

2318

priority.encode("utf-8"), None)

2319

2194

gnutls.priority_set_direct(session._c_object,

2195

priority.encode("utf-8"),

2196

None)

2197

2320

2198

# Start communication using the Mandos protocol

2321

2199

# Get protocol number

2322

2200

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

2323

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

2201

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

2324

2202

try:

2325

2203

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

2326

2204

raise RuntimeError(line)

2327

2205

except (ValueError, IndexError, RuntimeError) as error:

2328

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

2206

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

2329

2207

return

2330

2208

2331

2209

# Start GnuTLS connection

2332

2210

try:

2333

2211

session.handshake()

2334

2212

except gnutls.Error as error:

2335

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

2213

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

2336

2214

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

2337

2215

# established. Just abandon the request.

2338

2216

return

2339

log.debug("Handshake succeeded")

2340

2217

logger.debug("Handshake succeeded")

2218

2341

2219

approval_required = False

2342

2220

try:

2343

if gnutls.has_rawpk:

2344

fpr = b""

2345

try:

2346

key_id = self.key_id(

2347

self.peer_certificate(session))

2348

except (TypeError, gnutls.Error) as error:

2349

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

2350

return

2351

log.debug("Key ID: %s",

2352

key_id.decode("utf-8",

2353

errors="replace"))

2354

2355

else:

2356

key_id = b""

2357

try:

2358

fpr = self.fingerprint(

2359

self.peer_certificate(session))

2360

except (TypeError, gnutls.Error) as error:

2361

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

2362

return

2363

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

2364

2365

try:

2366

client = ProxyClient(child_pipe, key_id, fpr,

2221

try:

2222

fpr = self.fingerprint(

2223

self.peer_certificate(session))

2224

except (TypeError, gnutls.Error) as error:

2225

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

2226

return

2227

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

2228

2229

try:

2230

client = ProxyClient(child_pipe, fpr,

2367

2231

self.client_address)

2368

2232

except KeyError:

2369

2233

return

2370

2234

2371

2235

if client.approval_delay:

2372

2236

delay = client.approval_delay

2373

2237

client.approvals_pending += 1

2374

2238

approval_required = True

2375

2239

2376

2240

while True:

2377

2241

if not client.enabled:

2378

log.info("Client %s is disabled", client.name)

2242

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

2243

client.name)

2379

2244

if self.server.use_dbus:

2380

2245

# Emit D-Bus signal

2381

2246

client.Rejected("Disabled")

2382

2247

return

2383

2248

2384

2249

if client.approved or not client.approval_delay:

2385

# We are approved or approval is disabled

2250

#We are approved or approval is disabled

2386

2251

break

2387

2252

elif client.approved is None:

2388

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

2389

client.name)

2253

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

2254

client.name)

2390

2255

if self.server.use_dbus:

2391

2256

# Emit D-Bus signal

2392

2257

client.NeedApproval(

2393

2258

client.approval_delay.total_seconds()

2394

2259

* 1000, client.approved_by_default)

2395

2260

else:

2396

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

2397

client.name)

2261

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

2262

client.name)

2398

2263

if self.server.use_dbus:

2399

2264

# Emit D-Bus signal

2400

2265

client.Rejected("Denied")

2401

2266

return

2402

2403

# wait until timeout or approved

2267

2268

#wait until timeout or approved

2404

2269

time = datetime.datetime.now()

2405

2270

client.changedstate.acquire()

2406

2271

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

2408

2273

time2 = datetime.datetime.now()

2409

2274

if (time2 - time) >= delay:

2410

2275

if not client.approved_by_default:

2411

log.warning("Client %s timed out while"

2412

" waiting for approval",

2413

client.name)

2276

logger.warning("Client %s timed out while"

2277

" waiting for approval",

2278

client.name)

2414

2279

if self.server.use_dbus:

2415

2280

# Emit D-Bus signal

2416

2281

client.Rejected("Approval timed out")

2419

2284

break

2420

2285

else:

2421

2286

delay -= time2 - time

2422

2287

2423

2288

try:

2424

2289

session.send(client.secret)

2425

2290

except gnutls.Error as error:

2426

log.warning("gnutls send failed", exc_info=error)

2291

logger.warning("gnutls send failed",

2292

exc_info = error)

2427

2293

return

2428

2429

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

2294

2295

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

2430

2296

# bump the timeout using extended_timeout

2431

2297

client.bump_timeout(client.extended_timeout)

2432

2298

if self.server.use_dbus:

2433

2299

# Emit D-Bus signal

2434

2300

client.GotSecret()

2435

2301

2436

2302

finally:

2437

2303

if approval_required:

2438

2304

client.approvals_pending -= 1

2439

2305

try:

2440

2306

session.bye()

2441

2307

except gnutls.Error as error:

2442

log.warning("GnuTLS bye failed", exc_info=error)

2443

2308

logger.warning("GnuTLS bye failed",

2309

exc_info=error)

2310

2444

2311

@staticmethod

2445

2312

def peer_certificate(session):

2446

"Return the peer's certificate as a bytestring"

2447

try:

2448

cert_type = gnutls.certificate_type_get2(

2449

session, gnutls.CTYPE_PEERS)

2450

except AttributeError:

2451

cert_type = gnutls.certificate_type_get(session)

2452

if gnutls.has_rawpk:

2453

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2454

else:

2455

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2456

# If not a valid certificate type...

2457

if cert_type not in valid_cert_types:

2458

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

2459

valid_cert_types)

2313

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

2314

# If not an OpenPGP certificate...

2315

if (gnutls.certificate_type_get(session._c_object)

2316

!= gnutls.CRT_OPENPGP):

2460

2317

# ...return invalid data

2461

2318

return b""

2462

2319

list_size = ctypes.c_uint(1)

2463

2320

cert_list = (gnutls.certificate_get_peers

2464

(session, ctypes.byref(list_size)))

2321

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

2465

2322

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

2466

2323

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

2467

2324

if list_size.value == 0:

2468

2325

return None

2469

2326

cert = cert_list[0]

2470

2327

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

2471

2472

@staticmethod

2473

def key_id(certificate):

2474

"Convert a certificate bytestring to a hexdigit key ID"

2475

# New GnuTLS "datum" with the public key

2476

datum = gnutls.datum_t(

2477

ctypes.cast(ctypes.c_char_p(certificate),

2478

ctypes.POINTER(ctypes.c_ubyte)),

2479

ctypes.c_uint(len(certificate)))

2480

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

2481

# New empty GnuTLS certificate

2482

pubkey = gnutls.pubkey_t()

2483

gnutls.pubkey_init(ctypes.byref(pubkey))

2484

# Import the raw public key into the certificate

2485

gnutls.pubkey_import(pubkey,

2486

ctypes.byref(datum),

2487

gnutls.X509_FMT_DER)

2488

# New buffer for the key ID

2489

buf = ctypes.create_string_buffer(32)

2490

buf_len = ctypes.c_size_t(len(buf))

2491

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

2492

gnutls.pubkey_get_key_id(

2493

pubkey,

2494

gnutls.KEYID_USE_SHA256,

2495

ctypes.cast(ctypes.byref(buf),

2496

ctypes.POINTER(ctypes.c_ubyte)),

2497

ctypes.byref(buf_len))

2498

# Deinit the certificate

2499

gnutls.pubkey_deinit(pubkey)

2500

2501

# Convert the buffer to a Python bytestring

2502

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

2503

# Convert the bytestring to hexadecimal notation

2504

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

2505

return hex_key_id

2506

2328

2507

2329

@staticmethod

2508

2330

def fingerprint(openpgp):

2509

2331

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2524

2346

ctypes.byref(crtverify))

2525

2347

if crtverify.value != 0:

2526

2348

gnutls.openpgp_crt_deinit(crt)

2527

raise gnutls.CertificateSecurityError(code

2528

=crtverify.value)

2349

raise gnutls.CertificateSecurityError("Verify failed")

2529

2350

# New buffer for the fingerprint

2530

2351

buf = ctypes.create_string_buffer(20)

2531

2352

buf_len = ctypes.c_size_t()

2541

2362

return hex_fpr

2542

2363

2543

2364

2544

class MultiprocessingMixIn:

2365

class MultiprocessingMixIn(object):

2545

2366

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

2546

2367

2547

2368

def sub_process_main(self, request, address):

2548

2369

try:

2549

2370

self.finish_request(request, address)

2550

2371

except Exception:

2551

2372

self.handle_error(request, address)

2552

2373

self.close_request(request)

2553

2374

2554

2375

def process_request(self, request, address):

2555

2376

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

2556

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

2557

args=(request, address))

2377

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

2378

args = (request, address))

2558

2379

proc.start()

2559

2380

return proc

2560

2381

2561

2382

2562

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2383

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2563

2384

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

2564

2385

2565

2386

def process_request(self, request, client_address):

2566

2387

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

2567

2388

2568

2389

This function creates a new pipe in self.pipe

2569

2390

"""

2570

2391

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2571

2392

2572

2393

proc = MultiprocessingMixIn.process_request(self, request,

2573

2394

client_address)

2574

2395

self.child_pipe.close()

2575

2396

self.add_pipe(parent_pipe, proc)

2576

2397

2577

2398

def add_pipe(self, parent_pipe, proc):

2578

2399

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

2579

2400

raise NotImplementedError()

2580

2401

2581

2402

2582

2403

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2583

socketserver.TCPServer):

2584

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

2585

2404

socketserver.TCPServer, object):

2405

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

2406

2586

2407

Attributes:

2587

2408

enabled: Boolean; whether this server is activated yet

2588

2409

interface: None or a network interface name (string)

2589

2410

use_ipv6: Boolean; to use IPv6 or not

2590

2411

"""

2591

2412

2592

2413

def __init__(self, server_address, RequestHandlerClass,

2593

2414

interface=None,

2594

2415

use_ipv6=True,

2604

2425

self.socketfd = socketfd

2605

2426

# Save the original socket.socket() function

2606

2427

self.socket_socket = socket.socket

2607

2608

2428

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

2609

#

2429

#

2610

2430

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

2611

2431

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

2612

2432

# patching socket.socket.)

2613

#

2433

#

2614

2434

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

2615

2435

@functools.wraps(socket.socket)

2616

2436

def socket_wrapper(*args, **kwargs):

2628

2448

# socket_wrapper(), if socketfd was set.

2629

2449

socketserver.TCPServer.__init__(self, server_address,

2630

2450

RequestHandlerClass)

2631

2451

2632

2452

def server_bind(self):

2633

2453

"""This overrides the normal server_bind() function

2634

2454

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

2638

2458

if SO_BINDTODEVICE is None:

2639

2459

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

2640

2460

# common enough.

2641

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

2461

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

2642

2462

SO_BINDTODEVICE = 25

2643

2463

try:

2644

2464

self.socket.setsockopt(

2646

2466

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

2647

2467

except socket.error as error:

2648

2468

if error.errno == errno.EPERM:

2649

log.error("No permission to bind to interface %s",

2650

self.interface)

2469

logger.error("No permission to bind to"

2470

" interface %s", self.interface)

2651

2471

elif error.errno == errno.ENOPROTOOPT:

2652

log.error("SO_BINDTODEVICE not available; cannot"

2653

" bind to interface %s", self.interface)

2472

logger.error("SO_BINDTODEVICE not available;"

2473

" cannot bind to interface %s",

2474

self.interface)

2654

2475

elif error.errno == errno.ENODEV:

2655

log.error("Interface %s does not exist, cannot"

2656

" bind", self.interface)

2476

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

2477

" cannot bind", self.interface)

2657

2478

else:

2658

2479

raise

2659

2480

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

2660

2481

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

2661

if self.server_address[1]:

2662

self.allow_reuse_address = True

2663

2482

if not self.server_address[0]:

2664

2483

if self.address_family == socket.AF_INET6:

2665

any_address = "::" # in6addr_any

2484

any_address = "::" # in6addr_any

2666

2485

else:

2667

any_address = "0.0.0.0" # INADDR_ANY

2486

any_address = "0.0.0.0" # INADDR_ANY

2668

2487

self.server_address = (any_address,

2669

2488

self.server_address[1])

2670

2489

elif not self.server_address[1]:

2680

2499

2681

2500

class MandosServer(IPv6_TCPServer):

2682

2501

"""Mandos server.

2683

2502

2684

2503

Attributes:

2685

2504

clients: set of Client objects

2686

2505

gnutls_priority GnuTLS priority string

2687

2506

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

2688

2507

2689

2508

Assumes a GLib.MainLoop event loop.

2690

2509

"""

2691

2510

2692

2511

def __init__(self, server_address, RequestHandlerClass,

2693

2512

interface=None,

2694

2513

use_ipv6=True,

2704

2523

self.gnutls_priority = gnutls_priority

2705

2524

IPv6_TCPServer.__init__(self, server_address,

2706

2525

RequestHandlerClass,

2707

interface=interface,

2708

use_ipv6=use_ipv6,

2709

socketfd=socketfd)

2710

2526

interface = interface,

2527

use_ipv6 = use_ipv6,

2528

socketfd = socketfd)

2529

2711

2530

def server_activate(self):

2712

2531

if self.enabled:

2713

2532

return socketserver.TCPServer.server_activate(self)

2714

2533

2715

2534

def enable(self):

2716

2535

self.enabled = True

2717

2536

2718

2537

def add_pipe(self, parent_pipe, proc):

2719

2538

# Call "handle_ipc" for both data and EOF events

2720

2539

GLib.io_add_watch(

2721

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

2722

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

2540

parent_pipe.fileno(),

2541

GLib.IO_IN | GLib.IO_HUP,

2723

2542

functools.partial(self.handle_ipc,

2724

parent_pipe=parent_pipe,

2725

proc=proc))

2726

2543

parent_pipe = parent_pipe,

2544

proc = proc))

2545

2727

2546

def handle_ipc(self, source, condition,

2728

2547

parent_pipe=None,

2729

proc=None,

2548

proc = None,

2730

2549

client_object=None):

2731

2550

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

2732

2551

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

2733

2552

# Wait for other process to exit

2734

2553

proc.join()

2735

2554

return False

2736

2555

2737

2556

# Read a request from the child

2738

2557

request = parent_pipe.recv()

2739

2558

command = request[0]

2740

2741

if command == "init":

2742

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

2743

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

2744

address = request[3]

2745

2559

2560

if command == 'init':

2561

fpr = request[1]

2562

address = request[2]

2563

2746

2564

for c in self.clients.values():

2747

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2748

"27AE41E4649B934CA495991B7852B855"):

2749

continue

2750

if key_id and c.key_id == key_id:

2751

client = c

2752

break

2753

if fpr and c.fingerprint == fpr:

2565

if c.fingerprint == fpr:

2754

2566

client = c

2755

2567

break

2756

2568

else:

2757

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

2758

" %s", key_id or fpr, address)

2569

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

2570

"dress: %s", fpr, address)

2759

2571

if self.use_dbus:

2760

2572

# Emit D-Bus signal

2761

mandos_dbus_service.ClientNotFound(key_id or fpr,

2573

mandos_dbus_service.ClientNotFound(fpr,

2762

2574

address[0])

2763

2575

parent_pipe.send(False)

2764

2576

return False

2765

2577

2766

2578

GLib.io_add_watch(

2767

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

2768

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

2579

parent_pipe.fileno(),

2580

GLib.IO_IN | GLib.IO_HUP,

2769

2581

functools.partial(self.handle_ipc,

2770

parent_pipe=parent_pipe,

2771

proc=proc,

2772

client_object=client))

2582

parent_pipe = parent_pipe,

2583

proc = proc,

2584

client_object = client))

2773

2585

parent_pipe.send(True)

2774

2586

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

2775

2587

# same fileno

2776

2588

return False

2777

if command == "funcall":

2589

if command == 'funcall':

2778

2590

funcname = request[1]

2779

2591

args = request[2]

2780

2592

kwargs = request[3]

2781

2782

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

2593

2594

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

2783

2595

funcname)(*args,

2784

2596

**kwargs)))

2785

2786

if command == "getattr":

2597

2598

if command == 'getattr':

2787

2599

attrname = request[1]

2788

2600

if isinstance(client_object.__getattribute__(attrname),

2789

collections.abc.Callable):

2790

parent_pipe.send(("function", ))

2601

collections.Callable):

2602

parent_pipe.send(('function', ))

2791

2603

else:

2792

2604

parent_pipe.send((

2793

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

2794

2795

if command == "setattr":

2605

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

2606

2607

if command == 'setattr':

2796

2608

attrname = request[1]

2797

2609

value = request[2]

2798

2610

setattr(client_object, attrname, value)

2799

2611

2800

2612

return True

2801

2613

2802

2614

2803

2615

def rfc3339_duration_to_delta(duration):

2804

2616

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

2805

2806

>>> timedelta = datetime.timedelta

2807

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

2808

True

2809

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

2810

True

2811

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

2812

True

2813

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

2814

True

2815

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

2816

True

2817

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

2818

True

2819

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

2820

True

2821

>>> del timedelta

2617

2618

>>> rfc3339_duration_to_delta("P7D")

2619

datetime.timedelta(7)

2620

>>> rfc3339_duration_to_delta("PT60S")

2621

datetime.timedelta(0, 60)

2622

>>> rfc3339_duration_to_delta("PT60M")

2623

datetime.timedelta(0, 3600)

2624

>>> rfc3339_duration_to_delta("PT24H")

2625

datetime.timedelta(1)

2626

>>> rfc3339_duration_to_delta("P1W")

2627

datetime.timedelta(7)

2628

>>> rfc3339_duration_to_delta("PT5M30S")

2629

datetime.timedelta(0, 330)

2630

>>> rfc3339_duration_to_delta("P1DT3M20S")

2631

datetime.timedelta(1, 200)

2822

2632

"""

2823

2633

2824

2634

# Parsing an RFC 3339 duration with regular expressions is not

2825

2635

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

2826

2636

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

2827

2637

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

2828

2638

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

2829

2639

# avoid excessive use of external libraries.

2830

2640

2831

2641

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

2832

2642

Token = collections.namedtuple("Token", (

2833

2643

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

2866

2676

frozenset((token_year, token_month,

2867

2677

token_day, token_time,

2868

2678

token_week)))

2869

# Define starting values:

2870

# Value so far

2871

value = datetime.timedelta()

2679

# Define starting values

2680

value = datetime.timedelta() # Value so far

2872

2681

found_token = None

2873

# Following valid tokens

2874

followers = frozenset((token_duration, ))

2875

# String left to parse

2876

s = duration

2682

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

2683

s = duration # String left to parse

2877

2684

# Loop until end token is found

2878

2685

while found_token is not token_end:

2879

2686

# Search for any currently valid tokens

2903

2710

2904

2711

def string_to_delta(interval):

2905

2712

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

2906

2907

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

2908

True

2909

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

2910

True

2911

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

2912

True

2913

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

2914

True

2915

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

2916

True

2917

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

2918

True

2713

2714

>>> string_to_delta('7d')

2715

datetime.timedelta(7)

2716

>>> string_to_delta('60s')

2717

datetime.timedelta(0, 60)

2718

>>> string_to_delta('60m')

2719

datetime.timedelta(0, 3600)

2720

>>> string_to_delta('24h')

2721

datetime.timedelta(1)

2722

>>> string_to_delta('1w')

2723

datetime.timedelta(7)

2724

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

2725

datetime.timedelta(0, 330)

2919

2726

"""

2920

2727

2921

2728

try:

2922

2729

return rfc3339_duration_to_delta(interval)

2923

2730

except ValueError:

2924

2731

pass

2925

2732

2926

2733

timevalue = datetime.timedelta(0)

2927

2734

for s in interval.split():

2928

2735

try:

2946

2753

return timevalue

2947

2754

2948

2755

2949

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

2756

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

2950

2757

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

2951

2758

2952

2759

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

2953

2760

if os.fork():

2954

2761

sys.exit()

2972

2779

2973

2780

2974

2781

def main():

2975

2782

2976

2783

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

2977

2784

# Parsing of options, both command line and config file

2978

2785

2979

2786

parser = argparse.ArgumentParser()

2980

2787

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

2981

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

2788

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

2982

2789

help="show version number and exit")

2983

2790

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

2984

2791

help="Bind to interface IF")

3020

2827

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

3021

2828

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

3022

2829

default=None)

3023

2830

3024

2831

options = parser.parse_args()

3025

2832

2833

if options.check:

2834

import doctest

2835

fail_count, test_count = doctest.testmod()

2836

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

2837

3026

2838

# Default values for config file for server-global settings

3027

if gnutls.has_rawpk:

3028

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

3029

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

3030

else:

3031

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

3032

":+SIGN-DSA-SHA256")

3033

server_defaults = {"interface": "",

3034

"address": "",

3035

"port": "",

3036

"debug": "False",

3037

"priority": priority,

3038

"servicename": "Mandos",

3039

"use_dbus": "True",

3040

"use_ipv6": "True",

3041

"debuglevel": "",

3042

"restore": "True",

3043

"socket": "",

3044

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

3045

"foreground": "False",

3046

"zeroconf": "True",

3047

}

3048

del priority

3049

2839

server_defaults = { "interface": "",

2840

"address": "",

2841

"port": "",

2842

"debug": "False",

2843

"priority":

2844

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

2845

":+SIGN-DSA-SHA256",

2846

"servicename": "Mandos",

2847

"use_dbus": "True",

2848

"use_ipv6": "True",

2849

"debuglevel": "",

2850

"restore": "True",

2851

"socket": "",

2852

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

2853

"foreground": "False",

2854

"zeroconf": "True",

2855

}

2856

3050

2857

# Parse config file for server-global settings

3051

server_config = configparser.ConfigParser(server_defaults)

2858

server_config = configparser.SafeConfigParser(server_defaults)

3052

2859

del server_defaults

3053

2860

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

3054

# Convert the ConfigParser object to a dict

2861

# Convert the SafeConfigParser object to a dict

3055

2862

server_settings = server_config.defaults()

3056

2863

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

3057

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

3058

"foreground", "zeroconf"):

2864

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

3059

2865

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

3060

2866

option)

3061

2867

if server_settings["port"]:

3071

2877

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

3072

2878

["socket"])

3073

2879

del server_config

3074

2880

3075

2881

# Override the settings from the config file with command line

3076

2882

# options, if set.

3077

2883

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

3095

2901

if server_settings["debug"]:

3096

2902

server_settings["foreground"] = True

3097

2903

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

3098

2904

3099

2905

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

3100

2906

3101

2907

if (not server_settings["zeroconf"]

3102

2908

and not (server_settings["port"]

3103

2909

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

3104

2910

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

3105

2911

3106

2912

# For convenience

3107

2913

debug = server_settings["debug"]

3108

2914

debuglevel = server_settings["debuglevel"]

3112

2918

stored_state_file)

3113

2919

foreground = server_settings["foreground"]

3114

2920

zeroconf = server_settings["zeroconf"]

3115

2921

3116

2922

if debug:

3117

2923

initlogger(debug, logging.DEBUG)

3118

2924

else:

3121

2927

else:

3122

2928

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

3123

2929

initlogger(debug, level)

3124

2930

3125

2931

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

3126

2932

syslogger.setFormatter(

3127

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

3128

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

2933

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

2934

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

3129

2935

server_settings["servicename"])))

3130

2936

3131

2937

# Parse config file with clients

3132

client_config = configparser.ConfigParser(Client.client_defaults)

2938

client_config = configparser.SafeConfigParser(Client

2939

.client_defaults)

3133

2940

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

3134

2941

"clients.conf"))

3135

2942

3136

2943

global mandos_dbus_service

3137

2944

mandos_dbus_service = None

3138

2945

3139

2946

socketfd = None

3140

2947

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

3141

2948

socketfd = server_settings["socket"]

3155

2962

try:

3156

2963

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

3157

2964

except IOError as e:

3158

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

3159

exc_info=e)

3160

2965

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

2966

exc_info=e)

2967

3161

2968

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

3162

2969

("mandos", "mandos"),

3163

2970

("nobody", "nogroup")):

3173

2980

try:

3174

2981

os.setgid(gid)

3175

2982

os.setuid(uid)

3176

log.debug("Did setuid/setgid to %s:%s", uid, gid)

2983

if debug:

2984

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

2985

gid))

3177

2986

except OSError as error:

3178

log.warning("Failed to setuid/setgid to %s:%s: %s", uid, gid,

3179

os.strerror(error.errno))

2987

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

2988

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

3180

2989

if error.errno != errno.EPERM:

3181

2990

raise

3182

2991

3183

2992

if debug:

3184

2993

# Enable all possible GnuTLS debugging

3185

2994

3186

2995

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

3187

2996

# - GnuTLS manual

3188

2997

gnutls.global_set_log_level(11)

3189

2998

3190

2999

@gnutls.log_func

3191

3000

def debug_gnutls(level, string):

3192

log.debug("GnuTLS: %s",

3193

string[:-1].decode("utf-8", errors="replace"))

3194

3001

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

3002

3195

3003

gnutls.global_set_log_function(debug_gnutls)

3196

3004

3197

3005

# Redirect stdin so all checkers get /dev/null

3198

3006

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

3199

3007

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

3200

3008

if null > 2:

3201

3009

os.close(null)

3202

3010

3203

3011

# Need to fork before connecting to D-Bus

3204

3012

if not foreground:

3205

3013

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

3206

3014

daemon()

3207

3208

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

3209

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

3210

# need to inform GLib that threads will be used.

3211

GLib.threads_init()

3212

3015

3016

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

3017

# to inform GLib that threads will be used.

3018

GLib.threads_init()

3019

3213

3020

global main_loop

3214

3021

# From the Avahi example code

3215

3022

DBusGMainLoop(set_as_default=True)

3225

3032

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

3226

3033

do_not_queue=True)

3227

3034

except dbus.exceptions.DBusException as e:

3228

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

3035

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

3229

3036

use_dbus = False

3230

3037

server_settings["use_dbus"] = False

3231

3038

tcp_server.use_dbus = False

3232

3039

if zeroconf:

3233

3040

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3234

3041

service = AvahiServiceToSyslog(

3235

name=server_settings["servicename"],

3236

servicetype="_mandos._tcp",

3237

protocol=protocol,

3238

bus=bus)

3042

name = server_settings["servicename"],

3043

servicetype = "_mandos._tcp",

3044

protocol = protocol,

3045

bus = bus)

3239

3046

if server_settings["interface"]:

3240

3047

service.interface = if_nametoindex(

3241

3048

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

3242

3049

3243

3050

global multiprocessing_manager

3244

3051

multiprocessing_manager = multiprocessing.Manager()

3245

3052

3246

3053

client_class = Client

3247

3054

if use_dbus:

3248

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

3249

3055

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

3056

3250

3057

client_settings = Client.config_parser(client_config)

3251

3058

old_client_settings = {}

3252

3059

clients_data = {}

3253

3060

3254

3061

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

3255

3062

global wnull

3256

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

3063

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

3257

3064

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

3258

3065

# mode

3259

3066

if debug or not foreground:

3260

3067

wnull.close()

3261

3068

3262

3069

# Get client data and settings from last running state.

3263

3070

if server_settings["restore"]:

3264

3071

try:

3265

3072

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

3266

if sys.version_info.major == 2:

3073

if sys.version_info.major == 2:

3267

3074

clients_data, old_client_settings = pickle.load(

3268

3075

stored_state)

3269

3076

else:

3270

3077

bytes_clients_data, bytes_old_client_settings = (

3271

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

3272

# Fix bytes to strings

3273

# clients_data

3078

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

3079

### Fix bytes to strings

3080

## clients_data

3274

3081

# .keys()

3275

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

3276

if isinstance(key, bytes)

3277

else key): value

3278

for key, value in

3279

bytes_clients_data.items()}

3082

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

3083

if isinstance(key, bytes)

3084

else key): value

3085

for key, value in

3086

bytes_clients_data.items() }

3280

3087

del bytes_clients_data

3281

3088

for key in clients_data:

3282

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

3283

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

3284

for k, v in

3285

clients_data[key].items()}

3089

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

3090

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

3091

for k, v in

3092

clients_data[key].items() }

3286

3093

clients_data[key] = value

3287

3094

# .client_structure

3288

3095

value["client_structure"] = [

3289

3096

(s.decode("utf-8")

3290

3097

if isinstance(s, bytes)

3291

3098

else s) for s in

3292

value["client_structure"]]

3293

# .name, .host, and .checker_command

3294

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

3099

value["client_structure"] ]

3100

# .name & .host

3101

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

3295

3102

if isinstance(value[k], bytes):

3296

3103

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

3297

if "key_id" not in value:

3298

value["key_id"] = ""

3299

elif "fingerprint" not in value:

3300

value["fingerprint"] = ""

3301

# old_client_settings

3104

## old_client_settings

3302

3105

# .keys()

3303

3106

old_client_settings = {

3304

3107

(key.decode("utf-8")

3305

3108

if isinstance(key, bytes)

3306

3109

else key): value

3307

3110

for key, value in

3308

bytes_old_client_settings.items()}

3111

bytes_old_client_settings.items() }

3309

3112

del bytes_old_client_settings

3310

# .host and .checker_command

3113

# .host

3311

3114

for value in old_client_settings.values():

3312

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

3313

if isinstance(value[attribute], bytes):

3314

value[attribute] = (value[attribute]

3315

.decode("utf-8"))

3115

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

3116

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

3117

.decode("utf-8"))

3316

3118

os.remove(stored_state_path)

3317

3119

except IOError as e:

3318

3120

if e.errno == errno.ENOENT:

3319

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

3320

" %s", os.strerror(e.errno))

3121

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

3122

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

3321

3123

else:

3322

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

3323

exc_info=e)

3124

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

3125

exc_info=e)

3324

3126

raise

3325

3127

except EOFError as e:

3326

log.warning("Could not load persistent state: EOFError:",

3327

exc_info=e)

3328

3128

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

3129

"EOFError:",

3130

exc_info=e)

3131

3329

3132

with PGPEngine() as pgp:

3330

3133

for client_name, client in clients_data.items():

3331

3134

# Skip removed clients

3332

3135

if client_name not in client_settings:

3333

3136

continue

3334

3137

3335

3138

# Decide which value to use after restoring saved state.

3336

3139

# We have three different values: Old config file,

3337

3140

# new config file, and saved state.

3348

3151

client[name] = value

3349

3152

except KeyError:

3350

3153

pass

3351

3154

3352

3155

# Clients who has passed its expire date can still be

3353

3156

# enabled if its last checker was successful. A Client

3354

3157

# whose checker succeeded before we stored its state is

3357

3160

if client["enabled"]:

3358

3161

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

3359

3162

if not client["last_checked_ok"]:

3360

log.warning("disabling client %s - Client"

3361

" never performed a successful"

3362

" checker", client_name)

3163

logger.warning(

3164

"disabling client {} - Client never "

3165

"performed a successful checker".format(

3166

client_name))

3363

3167

client["enabled"] = False

3364

3168

elif client["last_checker_status"] != 0:

3365

log.warning("disabling client %s - Client"

3366

" last checker failed with error"

3367

" code %s", client_name,

3368

client["last_checker_status"])

3169

logger.warning(

3170

"disabling client {} - Client last"

3171

" checker failed with error code"

3172

" {}".format(

3173

client_name,

3174

client["last_checker_status"]))

3369

3175

client["enabled"] = False

3370

3176

else:

3371

3177

client["expires"] = (

3372

3178

datetime.datetime.utcnow()

3373

3179

+ client["timeout"])

3374

log.debug("Last checker succeeded, keeping %s"

3375

" enabled", client_name)

3180

logger.debug("Last checker succeeded,"

3181

" keeping {} enabled".format(

3182

client_name))

3376

3183

try:

3377

3184

client["secret"] = pgp.decrypt(

3378

3185

client["encrypted_secret"],

3379

3186

client_settings[client_name]["secret"])

3380

3187

except PGPError:

3381

3188

# If decryption fails, we use secret from new settings

3382

log.debug("Failed to decrypt %s old secret",

3383

client_name)

3189

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

3190

client_name))

3384

3191

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

3385

3192

["secret"])

3386

3193

3387

3194

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

3388

3195

for client_name in (set(old_client_settings)

3389

3196

- set(client_settings)):

3391

3198

for client_name in (set(client_settings)

3392

3199

- set(old_client_settings)):

3393

3200

clients_data[client_name] = client_settings[client_name]

3394

3201

3395

3202

# Create all client objects

3396

3203

for client_name, client in clients_data.items():

3397

3204

tcp_server.clients[client_name] = client_class(

3398

name=client_name,

3399

settings=client,

3400

server_settings=server_settings)

3401

3205

name = client_name,

3206

settings = client,

3207

server_settings = server_settings)

3208

3402

3209

if not tcp_server.clients:

3403

log.warning("No clients defined")

3404

3210

logger.warning("No clients defined")

3211

3405

3212

if not foreground:

3406

3213

if pidfile is not None:

3407

3214

pid = os.getpid()

3409

3216

with pidfile:

3410

3217

print(pid, file=pidfile)

3411

3218

except IOError:

3412

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

3413

pidfilename, pid)

3219

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

3220

pidfilename, pid)

3414

3221

del pidfile

3415

3222

del pidfilename

3416

3223

3417

3224

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

3418

3225

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3419

3226

lambda: main_loop.quit() and False)

3420

3227

3421

3228

if use_dbus:

3422

3229

3423

3230

@alternate_dbus_interfaces(

3424

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

3231

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

3425

3232

class MandosDBusService(DBusObjectWithObjectManager):

3426

3233

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

3427

3234

3428

3235

def __init__(self):

3429

3236

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

3430

3237

3431

3238

_interface = "se.recompile.Mandos"

3432

3239

3433

3240

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

3434

3241

def ClientAdded(self, objpath):

3435

3242

"D-Bus signal"

3436

3243

pass

3437

3244

3438

3245

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

3439

def ClientNotFound(self, key_id, address):

3246

def ClientNotFound(self, fingerprint, address):

3440

3247

"D-Bus signal"

3441

3248

pass

3442

3249

3443

3250

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

3444

3251

"true"})

3445

3252

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

3446

3253

def ClientRemoved(self, objpath, name):

3447

3254

"D-Bus signal"

3448

3255

pass

3449

3256

3450

3257

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

3451

3258

"true"})

3452

3259

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

3454

3261

"D-Bus method"

3455

3262

return dbus.Array(c.dbus_object_path for c in

3456

3263

tcp_server.clients.values())

3457

3264

3458

3265

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

3459

3266

"true"})

3460

3267

@dbus.service.method(_interface,

3462

3269

def GetAllClientsWithProperties(self):

3463

3270

"D-Bus method"

3464

3271

return dbus.Dictionary(

3465

{c.dbus_object_path: c.GetAll(

3272

{ c.dbus_object_path: c.GetAll(

3466

3273

"se.recompile.Mandos.Client")

3467

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

3274

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

3468

3275

signature="oa{sv}")

3469

3276

3470

3277

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

3471

3278

def RemoveClient(self, object_path):

3472

3279

"D-Bus method"

3480

3287

self.client_removed_signal(c)

3481

3288

return

3482

3289

raise KeyError(object_path)

3483

3290

3484

3291

del _interface

3485

3292

3486

3293

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3487

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

3294

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

3488

3295

def GetManagedObjects(self):

3489

3296

"""D-Bus method"""

3490

3297

return dbus.Dictionary(

3491

{client.dbus_object_path:

3492

dbus.Dictionary(

3493

{interface: client.GetAll(interface)

3494

for interface in

3495

client._get_all_interface_names()})

3496

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

3497

3298

{ client.dbus_object_path:

3299

dbus.Dictionary(

3300

{ interface: client.GetAll(interface)

3301

for interface in

3302

client._get_all_interface_names()})

3303

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

3304

3498

3305

def client_added_signal(self, client):

3499

3306

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

3500

3307

if use_dbus:

3502

3309

self.InterfacesAdded(

3503

3310

client.dbus_object_path,

3504

3311

dbus.Dictionary(

3505

{interface: client.GetAll(interface)

3506

for interface in

3507

client._get_all_interface_names()}))

3312

{ interface: client.GetAll(interface)

3313

for interface in

3314

client._get_all_interface_names()}))

3508

3315

# Old signal

3509

3316

self.ClientAdded(client.dbus_object_path)

3510

3317

3511

3318

def client_removed_signal(self, client):

3512

3319

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

3513

3320

if use_dbus:

3518

3325

# Old signal

3519

3326

self.ClientRemoved(client.dbus_object_path,

3520

3327

client.name)

3521

3328

3522

3329

mandos_dbus_service = MandosDBusService()

3523

3330

3524

3331

# Save modules to variables to exempt the modules from being

3525

3332

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

3526

3333

mp = multiprocessing

3527

3334

wn = wnull

3528

3529

3335

def cleanup():

3530

3336

"Cleanup function; run on exit"

3531

3337

if zeroconf:

3532

3338

service.cleanup()

3533

3339

3534

3340

mp.active_children()

3535

3341

wn.close()

3536

3342

if not (tcp_server.clients or client_settings):

3537

3343

return

3538

3344

3539

3345

# Store client before exiting. Secrets are encrypted with key

3540

3346

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

3541

3347

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

3546

3352

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

3547

3353

key)

3548

3354

client_dict = {}

3549

3355

3550

3356

# A list of attributes that can not be pickled

3551

3357

# + secret.

3552

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

3553

"checker", "server_settings"}

3358

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

3359

"checker", "server_settings" }

3554

3360

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

3555

3361

.Object):

3556

3362

exclude.add(name)

3557

3363

3558

3364

client_dict["encrypted_secret"] = (client

3559

3365

.encrypted_secret)

3560

3366

for attr in client.client_structure:

3561

3367

if attr not in exclude:

3562

3368

client_dict[attr] = getattr(client, attr)

3563

3369

3564

3370

clients[client.name] = client_dict

3565

3371

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

3566

3372

3567

3373

try:

3568

3374

with tempfile.NamedTemporaryFile(

3569

mode="wb",

3375

mode='wb',

3570

3376

suffix=".pickle",

3571

prefix="clients-",

3377

prefix='clients-',

3572

3378

dir=os.path.dirname(stored_state_path),

3573

3379

delete=False) as stored_state:

3574

3380

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

3575

protocol=2)

3381

protocol = 2)

3576

3382

tempname = stored_state.name

3577

3383

os.rename(tempname, stored_state_path)

3578

3384

except (IOError, OSError) as e:

3582

3388

except NameError:

3583

3389

pass

3584

3390

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

3585

log.warning("Could not save persistent state: %s",

3586

os.strerror(e.errno))

3391

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

3392

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

3587

3393

else:

3588

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

3589

exc_info=e)

3394

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

3395

exc_info=e)

3590

3396

raise

3591

3397

3592

3398

# Delete all clients, and settings from config

3593

3399

while tcp_server.clients:

3594

3400

name, client = tcp_server.clients.popitem()

3600

3406

if use_dbus:

3601

3407

mandos_dbus_service.client_removed_signal(client)

3602

3408

client_settings.clear()

3603

3409

3604

3410

atexit.register(cleanup)

3605

3411

3606

3412

for client in tcp_server.clients.values():

3607

3413

if use_dbus:

3608

3414

# Emit D-Bus signal for adding

3610

3416

# Need to initiate checking of clients

3611

3417

if client.enabled:

3612

3418

client.init_checker()

3613

3419

3614

3420

tcp_server.enable()

3615

3421

tcp_server.server_activate()

3616

3422

3617

3423

# Find out what port we got

3618

3424

if zeroconf:

3619

3425

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

3620

3426

if use_ipv6:

3621

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

3622

" scope_id %d", *tcp_server.socket.getsockname())

3427

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

3428

" flowinfo %d, scope_id %d",

3429

*tcp_server.socket.getsockname())

3623

3430

else: # IPv4

3624

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

3625

*tcp_server.socket.getsockname())

3626

3627

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

3628

3431

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

3432

*tcp_server.socket.getsockname())

3433

3434

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

3435

3629

3436

try:

3630

3437

if zeroconf:

3631

3438

# From the Avahi example code

3632

3439

try:

3633

3440

service.activate()

3634

3441

except dbus.exceptions.DBusException as error:

3635

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

3442

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

3636

3443

cleanup()

3637

3444

sys.exit(1)

3638

3445

# End of Avahi example code

3639

3640

GLib.io_add_watch(

3641

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

3642

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3643

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

3644

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

3645

3646

log.debug("Starting main loop")

3446

3447

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

3448

lambda *args, **kwargs:

3449

(tcp_server.handle_request

3450

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

3451

3452

logger.debug("Starting main loop")

3647

3453

main_loop.run()

3648

3454

except AvahiError as error:

3649

log.critical("Avahi Error", exc_info=error)

3455

logger.critical("Avahi Error", exc_info=error)

3650

3456

cleanup()

3651

3457

sys.exit(1)

3652

3458

except KeyboardInterrupt:

3653

3459

if debug:

3654

3460

print("", file=sys.stderr)

3655

log.debug("Server received KeyboardInterrupt")

3656

log.debug("Server exiting")

3461

logger.debug("Server received KeyboardInterrupt")

3462

logger.debug("Server exiting")

3657

3463

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

3658

3464

cleanup()

3659

3465

3660

3661

def parse_test_args():

3662

# type: () -> argparse.Namespace

3663

parser = argparse.ArgumentParser(add_help=False)

3664

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

3665

parser.add_argument("--prefix", )

3666

args, unknown_args = parser.parse_known_args()

3667

if args.check:

3668

# Remove test options from sys.argv

3669

sys.argv[1:] = unknown_args

3670

return args

3671

3672

# Add all tests from doctest strings

3673

def load_tests(loader, tests, none):

3674

import doctest

3675

tests.addTests(doctest.DocTestSuite())

3676

return tests

3677

3678

if __name__ == "__main__":

3679

options = parse_test_args()

3680

try:

3681

if options.check:

3682

extra_test_prefix = options.prefix

3683

if extra_test_prefix is not None:

3684

if not (unittest.main(argv=[""], exit=False)

3685

.result.wasSuccessful()):

3686

sys.exit(1)

3687

class ExtraTestLoader(unittest.TestLoader):

3688

testMethodPrefix = extra_test_prefix

3689

# Call using ./scriptname --test [--verbose]

3690

unittest.main(argv=[""], testLoader=ExtraTestLoader())

3691

else:

3692

unittest.main(argv=[""])

3693

else:

3694

main()

3695

finally:

3696

logging.shutdown()

3697

3698

# Local Variables:

3699

# run-tests:

3700

# (lambda (&optional extra)

3701

# (if (not (funcall run-tests-in-test-buffer default-directory

3702

# extra))

3703

# (funcall show-test-buffer-in-test-window)

3704

# (funcall remove-test-window)

3705

# (if extra (message "Extra tests run successfully!"))))

3706

# run-tests-in-test-buffer:

3707

# (lambda (dir &optional extra)

3708

# (with-current-buffer (get-buffer-create "*Test*")

3709

# (setq buffer-read-only nil

3710

# default-directory dir)

3711

# (erase-buffer)

3712

# (compilation-mode))

3713

# (let ((process-result

3714

# (let ((inhibit-read-only t))

3715

# (process-file-shell-command

3716

# (funcall get-command-line extra) nil "*Test*"))))

3717

# (and (numberp process-result)

3718

# (= process-result 0))))

3719

# get-command-line:

3720

# (lambda (&optional extra)

3721

# (let ((quoted-script

3722

# (shell-quote-argument (funcall get-script-name))))

3723

# (format

3724

# (concat "%s --check" (if extra " --prefix=atest" ""))

3725

# quoted-script)))

3726

# get-script-name:

3727

# (lambda ()

3728

# (if (fboundp 'file-local-name)

3729

# (file-local-name (buffer-file-name))

3730

# (or (file-remote-p (buffer-file-name) 'localname)

3731

# (buffer-file-name))))

3732

# remove-test-window:

3733

# (lambda ()

3734

# (let ((test-window (get-buffer-window "*Test*")))

3735

# (if test-window (delete-window test-window))))

3736

# show-test-buffer-in-test-window:

3737

# (lambda ()

3738

# (when (not (get-buffer-window-list "*Test*"))

3739

# (setq next-error-last-buffer (get-buffer "*Test*"))

3740

# (let* ((side (if (>= (window-width) 146) 'right 'bottom))

3741

# (display-buffer-overriding-action

3742

# `((display-buffer-in-side-window) (side . ,side)

3743

# (window-height . fit-window-to-buffer)

3744

# (window-width . fit-window-to-buffer))))

3745

# (display-buffer "*Test*"))))

3746

# eval:

3747

# (progn

3748

# (let* ((run-extra-tests (lambda () (interactive)

3749

# (funcall run-tests t)))

3750

# (inner-keymap `(keymap (116 . ,run-extra-tests))) ; t

3751

# (outer-keymap `(keymap (3 . ,inner-keymap)))) ; C-c

3752

# (setq minor-mode-overriding-map-alist

3753

# (cons `(run-tests . ,outer-keymap)

3754

# minor-mode-overriding-map-alist)))

3755

# (add-hook 'after-save-hook run-tests 90 t))

3756

# End:

3466

3467

if __name__ == '__main__':

3468

main()