/mandos/release : revision 237.7.175

11

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

12

#

13

# Everything else is

14

15

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

28

# along with this program. If not, see

29

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

30

#

31

# Contact the authors at <mandos@fukt.bsnet.se>.

31

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

32

#

33

34

from __future__ import (division, absolute_import, print_function,

35

unicode_literals)

36

37

from future_builtins import *

38

37

39

import SocketServer as socketserver

38

40

import socket

39

41

import argparse

62

64

import functools

63

65

import cPickle as pickle

64

66

import multiprocessing

67

import types

68

import binascii

69

import tempfile

70

import itertools

71

import collections

65

72

66

73

import dbus

67

74

import dbus.service

81

88

except ImportError:

82

89

SO_BINDTODEVICE = None

83

90

84

85

version = "1.3.0"

86

87

#logger = logging.getLogger('mandos')

88

logger = logging.Logger('mandos')

91

version = "1.6.1"

92

stored_state_file = "clients.pickle"

93

94

logger = logging.getLogger()

89

95

syslogger = (logging.handlers.SysLogHandler

90

96

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

91

97

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

92

syslogger.setFormatter(logging.Formatter

93

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

94

' %(message)s'))

95

logger.addHandler(syslogger)

96

97

console = logging.StreamHandler()

98

console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'

99

' %(levelname)s:'

100

' %(message)s'))

101

logger.addHandler(console)

98

99

try:

100

if_nametoindex = (ctypes.cdll.LoadLibrary

101

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

102

.if_nametoindex)

103

except (OSError, AttributeError):

104

def if_nametoindex(interface):

105

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

106

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

107

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

108

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

109

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

110

interface))

111

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

112

ifreq[16:20])[0]

113

return interface_index

114

115

116

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

117

"""init logger and add loglevel"""

118

119

syslogger.setFormatter(logging.Formatter

120

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

121

' %(message)s'))

122

logger.addHandler(syslogger)

123

124

if debug:

125

console = logging.StreamHandler()

126

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

127

' [%(process)d]:'

128

' %(levelname)s:'

129

' %(message)s'))

130

logger.addHandler(console)

131

logger.setLevel(level)

132

133

134

class PGPError(Exception):

135

"""Exception if encryption/decryption fails"""

136

pass

137

138

139

class PGPEngine(object):

140

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

141

def __init__(self):

142

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

143

self.gnupgargs = ['--batch',

144

'--home', self.tempdir,

145

'--force-mdc',

146

'--quiet',

147

'--no-use-agent']

148

149

def __enter__(self):

150

return self

151

152

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

153

self._cleanup()

154

return False

155

156

def __del__(self):

157

self._cleanup()

158

159

def _cleanup(self):

160

if self.tempdir is not None:

161

# Delete contents of tempdir

162

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

163

topdown = False):

164

for filename in files:

165

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

166

for dirname in dirs:

167

os.rmdir(os.path.join(root, dirname))

168

# Remove tempdir

169

os.rmdir(self.tempdir)

170

self.tempdir = None

171

172

def password_encode(self, password):

173

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

174

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

175

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

176

177

def encrypt(self, data, password):

178

passphrase = self.password_encode(password)

179

with tempfile.NamedTemporaryFile(dir=self.tempdir

180

) as passfile:

181

passfile.write(passphrase)

182

passfile.flush()

183

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

184

'--passphrase-file',

185

passfile.name]

186

+ self.gnupgargs,

187

stdin = subprocess.PIPE,

188

stdout = subprocess.PIPE,

189

stderr = subprocess.PIPE)

190

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

191

if proc.returncode != 0:

192

raise PGPError(err)

193

return ciphertext

194

195

def decrypt(self, data, password):

196

passphrase = self.password_encode(password)

197

with tempfile.NamedTemporaryFile(dir = self.tempdir

198

) as passfile:

199

passfile.write(passphrase)

200

passfile.flush()

201

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

202

'--passphrase-file',

203

passfile.name]

204

+ self.gnupgargs,

205

stdin = subprocess.PIPE,

206

stdout = subprocess.PIPE,

207

stderr = subprocess.PIPE)

208

decrypted_plaintext, err = proc.communicate(input

209

= data)

210

if proc.returncode != 0:

211

raise PGPError(err)

212

return decrypted_plaintext

213

102

214

103

215

class AvahiError(Exception):

104

216

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

122

234

Used to optionally bind to the specified interface.

123

235

name: string; Example: 'Mandos'

124

236

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

125

See <http://www.dns-sd.org/ServiceTypes.html>

237

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

126

238

port: integer; what port to announce

127

239

TXT: list of strings; TXT record for the service

128

240

domain: string; Domain to publish on, default to .local if empty.

134

246

server: D-Bus Server

135

247

bus: dbus.SystemBus()

136

248

"""

249

137

250

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

138

251

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

139

252

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

152

265

self.server = None

153

266

self.bus = bus

154

267

self.entry_group_state_changed_match = None

268

155

269

def rename(self):

156

270

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

157

271

if self.rename_count >= self.max_renames:

159

273

" after %i retries, exiting.",

160

274

self.rename_count)

161

275

raise AvahiServiceError("Too many renames")

162

self.name = unicode(self.server.GetAlternativeServiceName(self.name))

276

self.name = unicode(self.server

277

.GetAlternativeServiceName(self.name))

163

278

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

164

279

self.name)

165

syslogger.setFormatter(logging.Formatter

166

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

167

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

168

% self.name))

169

280

self.remove()

170

281

try:

171

282

self.add()

172

283

except dbus.exceptions.DBusException as error:

173

logger.critical("DBusException: %s", error)

284

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

174

285

self.cleanup()

175

286

os._exit(1)

176

287

self.rename_count += 1

288

177

289

def remove(self):

178

290

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

179

291

if self.entry_group_state_changed_match is not None:

181

293

self.entry_group_state_changed_match = None

182

294

if self.group is not None:

183

295

self.group.Reset()

296

184

297

def add(self):

185

298

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

186

299

self.remove()

191

304

avahi.DBUS_INTERFACE_ENTRY_GROUP)

192

305

self.entry_group_state_changed_match = (

193

306

self.group.connect_to_signal(

194

'StateChanged', self .entry_group_state_changed))

307

'StateChanged', self.entry_group_state_changed))

195

308

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

196

309

self.name, self.type)

197

310

self.group.AddService(

203

316

dbus.UInt16(self.port),

204

317

avahi.string_array_to_txt_array(self.TXT))

205

318

self.group.Commit()

319

206

320

def entry_group_state_changed(self, state, error):

207

321

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

208

322

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

215

329

elif state == avahi.ENTRY_GROUP_FAILURE:

216

330

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

217

331

unicode(error))

218

raise AvahiGroupError("State changed: %s"

219

% unicode(error))

332

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

333

.format(error))

334

220

335

def cleanup(self):

221

336

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

222

337

if self.group is not None:

223

338

try:

224

339

self.group.Free()

225

340

except (dbus.exceptions.UnknownMethodException,

226

dbus.exceptions.DBusException) as e:

341

dbus.exceptions.DBusException):

227

342

pass

228

343

self.group = None

229

344

self.remove()

345

230

346

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

231

347

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

232

348

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

251

367

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

252

368

else:

253

369

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

370

254

371

def activate(self):

255

372

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

256

373

if self.server is None:

264

381

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

265

382

266

383

384

class AvahiServiceToSyslog(AvahiService):

385

def rename(self):

386

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

387

ret = AvahiService.rename(self)

388

syslogger.setFormatter(logging.Formatter

389

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

390

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

391

.format(self.name)))

392

return ret

393

394

395

def timedelta_to_milliseconds(td):

396

"Convert a datetime.timedelta() to milliseconds"

397

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

398

+ (td.seconds * 1000)

399

+ (td.microseconds // 1000))

400

401

267

402

class Client(object):

268

403

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

269

404

270

405

Attributes:

271

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

406

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

272

407

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

273

408

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

274

409

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

281

416

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

282

417

checker_initiator_tag: a gobject event source tag, or None

283

418

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

419

client_structure: Object describing what attributes a client has

420

and is used for storing the client at exit

284

421

current_checker_command: string; current running checker_command

285

disable_hook: If set, called by disable() as disable_hook(self)

286

422

disable_initiator_tag: a gobject event source tag, or None

287

423

enabled: bool()

288

424

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

291

427

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

292

428

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

293

429

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

294

last_enabled: datetime.datetime(); (UTC)

430

last_checker_status: integer between 0 and 255 reflecting exit

431

status of last checker. -1 reflects crashed

432

checker, -2 means no checker completed yet.

433

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

295

434

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

296

435

D-Bus identifiers

297

436

secret: bytestring; sent verbatim (over TLS) to client

298

437

timeout: datetime.timedelta(); How long from last_checked_ok

299

438

until this client is disabled

439

extended_timeout: extra long timeout when secret has been sent

300

440

runtime_expansions: Allowed attributes for runtime expansion.

441

expires: datetime.datetime(); time (UTC) when a client will be

442

disabled, or None

443

server_settings: The server_settings dict from main()

301

444

"""

302

445

303

446

runtime_expansions = ("approval_delay", "approval_duration",

304

"created", "enabled", "fingerprint",

305

"host", "interval", "last_checked_ok",

447

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

448

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

449

"last_approval_request", "last_checked_ok",

306

450

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

307

308

@staticmethod

309

def _timedelta_to_milliseconds(td):

310

"Convert a datetime.timedelta() to milliseconds"

311

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

312

+ (td.seconds * 1000)

313

+ (td.microseconds // 1000))

451

client_defaults = { "timeout": "PT5M",

452

"extended_timeout": "PT15M",

453

"interval": "PT2M",

454

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

455

"host": "",

456

"approval_delay": "PT0S",

457

"approval_duration": "PT1S",

458

"approved_by_default": "True",

459

"enabled": "True",

460

}

314

461

315

462

def timeout_milliseconds(self):

316

463

"Return the 'timeout' attribute in milliseconds"

317

return self._timedelta_to_milliseconds(self.timeout)

464

return timedelta_to_milliseconds(self.timeout)

465

466

def extended_timeout_milliseconds(self):

467

"Return the 'extended_timeout' attribute in milliseconds"

468

return timedelta_to_milliseconds(self.extended_timeout)

318

469

319

470

def interval_milliseconds(self):

320

471

"Return the 'interval' attribute in milliseconds"

321

return self._timedelta_to_milliseconds(self.interval)

322

472

return timedelta_to_milliseconds(self.interval)

473

323

474

def approval_delay_milliseconds(self):

324

return self._timedelta_to_milliseconds(self.approval_delay)

325

326

def __init__(self, name = None, disable_hook=None, config=None):

327

"""Note: the 'checker' key in 'config' sets the

328

'checker_command' attribute and *not* the 'checker'

329

attribute."""

475

return timedelta_to_milliseconds(self.approval_delay)

476

477

@staticmethod

478

def config_parser(config):

479

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

480

{ client_name: {setting_name: value, ...}, ...}

481

with exceptions for any special settings as defined above.

482

NOTE: Must be a pure function. Must return the same result

483

value given the same arguments.

484

"""

485

settings = {}

486

for client_name in config.sections():

487

section = dict(config.items(client_name))

488

client = settings[client_name] = {}

489

490

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

491

# Reformat values from string types to Python types

492

client["approved_by_default"] = config.getboolean(

493

client_name, "approved_by_default")

494

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

495

"enabled")

496

497

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

498

.replace(" ", ""))

499

if "secret" in section:

500

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

501

elif "secfile" in section:

502

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

503

(section["secfile"])),

504

"rb") as secfile:

505

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

506

else:

507

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

508

.format(section))

509

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

510

client["extended_timeout"] = string_to_delta(

511

section["extended_timeout"])

512

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

513

client["approval_delay"] = string_to_delta(

514

section["approval_delay"])

515

client["approval_duration"] = string_to_delta(

516

section["approval_duration"])

517

client["checker_command"] = section["checker"]

518

client["last_approval_request"] = None

519

client["last_checked_ok"] = None

520

client["last_checker_status"] = -2

521

522

return settings

523

524

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

330

525

self.name = name

331

if config is None:

332

config = {}

526

if server_settings is None:

527

server_settings = {}

528

self.server_settings = server_settings

529

# adding all client settings

530

for setting, value in settings.iteritems():

531

setattr(self, setting, value)

532

533

if self.enabled:

534

if not hasattr(self, "last_enabled"):

535

self.last_enabled = datetime.datetime.utcnow()

536

if not hasattr(self, "expires"):

537

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

538

+ self.timeout)

539

else:

540

self.last_enabled = None

541

self.expires = None

542

333

543

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

334

544

# Uppercase and remove spaces from fingerprint for later

335

545

# comparison purposes with return value from the fingerprint()

336

546

# function

337

self.fingerprint = (config["fingerprint"].upper()

338

.replace(" ", ""))

339

547

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

340

if "secret" in config:

341

self.secret = config["secret"].decode("base64")

342

elif "secfile" in config:

343

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

344

(config["secfile"])),

345

"rb") as secfile:

346

self.secret = secfile.read()

347

else:

348

raise TypeError("No secret or secfile for client %s"

349

% self.name)

350

self.host = config.get("host", "")

351

self.created = datetime.datetime.utcnow()

352

self.enabled = False

353

self.last_approval_request = None

354

self.last_enabled = None

355

self.last_checked_ok = None

356

self.timeout = string_to_delta(config["timeout"])

357

self.interval = string_to_delta(config["interval"])

358

self.disable_hook = disable_hook

548

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

549

datetime.datetime.utcnow())

550

551

# attributes specific for this server instance

359

552

self.checker = None

360

553

self.checker_initiator_tag = None

361

554

self.disable_initiator_tag = None

362

555

self.checker_callback_tag = None

363

self.checker_command = config["checker"]

364

556

self.current_checker_command = None

365

self.last_connect = None

366

self._approved = None

367

self.approved_by_default = config.get("approved_by_default",

368

True)

557

self.approved = None

369

558

self.approvals_pending = 0

370

self.approval_delay = string_to_delta(

371

config["approval_delay"])

372

self.approval_duration = string_to_delta(

373

config["approval_duration"])

374

self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())

559

self.changedstate = (multiprocessing_manager

560

.Condition(multiprocessing_manager

561

.Lock()))

562

self.client_structure = [attr for attr in

563

self.__dict__.iterkeys()

564

if not attr.startswith("_")]

565

self.client_structure.append("client_structure")

566

567

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

568

lambda obj:

569

isinstance(obj,

570

property)):

571

if not name.startswith("_"):

572

self.client_structure.append(name)

375

573

574

# Send notice to process children that client state has changed

376

575

def send_changedstate(self):

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

576

with self.changedstate:

577

self.changedstate.notify_all()

578

381

579

def enable(self):

382

580

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

383

581

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

384

582

# Already enabled

385

583

return

386

self.send_changedstate()

584

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

585

self.enabled = True

387

586

self.last_enabled = datetime.datetime.utcnow()

587

self.init_checker()

588

self.send_changedstate()

589

590

def disable(self, quiet=True):

591

"""Disable this client."""

592

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

593

return False

594

if not quiet:

595

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

596

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

597

gobject.source_remove(self.disable_initiator_tag)

598

self.disable_initiator_tag = None

599

self.expires = None

600

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

601

gobject.source_remove(self.checker_initiator_tag)

602

self.checker_initiator_tag = None

603

self.stop_checker()

604

self.enabled = False

605

if not quiet:

606

self.send_changedstate()

607

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

608

return False

609

610

def __del__(self):

611

self.disable()

612

613

def init_checker(self):

388

614

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

389

615

# and every interval from then on.

616

if self.checker_initiator_tag is not None:

617

gobject.source_remove(self.checker_initiator_tag)

390

618

self.checker_initiator_tag = (gobject.timeout_add

391

619

(self.interval_milliseconds(),

392

620

self.start_checker))

393

621

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

622

if self.disable_initiator_tag is not None:

623

gobject.source_remove(self.disable_initiator_tag)

394

624

self.disable_initiator_tag = (gobject.timeout_add

395

625

(self.timeout_milliseconds(),

396

626

self.disable))

397

self.enabled = True

398

627

# Also start a new checker *right now*.

399

628

self.start_checker()

400

629

401

def disable(self, quiet=True):

402

"""Disable this client."""

403

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

404

return False

405

if not quiet:

406

self.send_changedstate()

407

if not quiet:

408

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

409

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

410

gobject.source_remove(self.disable_initiator_tag)

411

self.disable_initiator_tag = None

412

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

413

gobject.source_remove(self.checker_initiator_tag)

414

self.checker_initiator_tag = None

415

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

418

self.enabled = False

419

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

420

return False

421

422

def __del__(self):

423

self.disable_hook = None

424

self.disable()

425

426

630

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

427

631

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

428

632

self.checker_callback_tag = None

429

633

self.checker = None

430

634

if os.WIFEXITED(condition):

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

635

self.last_checker_status = os.WEXITSTATUS(condition)

636

if self.last_checker_status == 0:

433

637

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

434

638

vars(self))

435

639

self.checked_ok()

437

641

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

438

642

vars(self))

439

643

else:

644

self.last_checker_status = -1

440

645

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

441

646

vars(self))

442

647

443

648

def checked_ok(self):

444

"""Bump up the timeout for this client.

445

446

This should only be called when the client has been seen,

447

alive and well.

448

"""

649

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

449

650

self.last_checked_ok = datetime.datetime.utcnow()

450

gobject.source_remove(self.disable_initiator_tag)

451

self.disable_initiator_tag = (gobject.timeout_add

452

(self.timeout_milliseconds(),

453

self.disable))

651

self.last_checker_status = 0

652

self.bump_timeout()

653

654

def bump_timeout(self, timeout=None):

655

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

656

if timeout is None:

657

timeout = self.timeout

658

if self.disable_initiator_tag is not None:

659

gobject.source_remove(self.disable_initiator_tag)

660

self.disable_initiator_tag = None

661

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

662

self.disable_initiator_tag = (gobject.timeout_add

663

(timedelta_to_milliseconds

664

(timeout), self.disable))

665

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

454

666

455

667

def need_approval(self):

456

668

self.last_approval_request = datetime.datetime.utcnow()

461

673

If a checker already exists, leave it running and do

462

674

nothing."""

463

675

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

464

# did that, then if a checker (for some reason) started

465

# running slowly and taking more than 'interval' time, the

466

# client would inevitably timeout, since no checker would get

467

# a chance to run to completion. If we instead leave running

676

# did that, and if a checker (for some reason) started running

677

# slowly and taking more than 'interval' time, then the client

678

# would inevitably timeout, since no checker would get a

679

# chance to run to completion. If we instead leave running

468

680

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

469

681

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

470

682

# should be.

484

696

self.current_checker_command)

485

697

# Start a new checker if needed

486

698

if self.checker is None:

699

# Escape attributes for the shell

700

escaped_attrs = dict(

701

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

702

for attr in

703

self.runtime_expansions)

487

704

try:

488

# In case checker_command has exactly one % operator

489

command = self.checker_command % self.host

490

except TypeError:

491

# Escape attributes for the shell

492

escaped_attrs = dict(

493

(attr,

494

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

495

errors=

496

'replace')))

497

for attr in

498

self.runtime_expansions)

499

500

try:

501

command = self.checker_command % escaped_attrs

502

except TypeError as error:

503

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

504

' %s', self.checker_command, error)

505

return True # Try again later

705

command = self.checker_command % escaped_attrs

706

except TypeError as error:

707

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

708

self.checker_command, exc_info=error)

709

return True # Try again later

506

710

self.current_checker_command = command

507

711

try:

508

712

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

511

715

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

512

716

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

513

717

# always replaced by /dev/null.)

718

# The exception is when not debugging but nevertheless

719

# running in the foreground; use the previously

720

# created wnull.

721

popen_args = {}

722

if (not self.server_settings["debug"]

723

and self.server_settings["foreground"]):

724

popen_args.update({"stdout": wnull,

725

"stderr": wnull })

514

726

self.checker = subprocess.Popen(command,

515

727

close_fds=True,

516

shell=True, cwd="/")

517

self.checker_callback_tag = (gobject.child_watch_add

518

(self.checker.pid,

519

self.checker_callback,

520

data=command))

521

# The checker may have completed before the gobject

522

# watch was added. Check for this.

728

shell=True, cwd="/",

729

**popen_args)

730

except OSError as error:

731

logger.error("Failed to start subprocess",

732

exc_info=error)

733

return True

734

self.checker_callback_tag = (gobject.child_watch_add

735

(self.checker.pid,

736

self.checker_callback,

737

data=command))

738

# The checker may have completed before the gobject

739

# watch was added. Check for this.

740

try:

523

741

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

524

if pid:

525

gobject.source_remove(self.checker_callback_tag)

526

self.checker_callback(pid, status, command)

527

742

except OSError as error:

528

logger.error("Failed to start subprocess: %s",

529

error)

743

if error.errno == errno.ECHILD:

744

# This should never happen

745

logger.error("Child process vanished",

746

exc_info=error)

747

return True

748

raise

749

if pid:

750

gobject.source_remove(self.checker_callback_tag)

751

self.checker_callback(pid, status, command)

530

752

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

531

753

return True

532

754

539

761

return

540

762

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

541

763

try:

542

os.kill(self.checker.pid, signal.SIGTERM)

764

self.checker.terminate()

543

765

#time.sleep(0.5)

544

766

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

545

# os.kill(self.checker.pid, signal.SIGKILL)

767

# self.checker.kill()

546

768

except OSError as error:

547

769

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

548

770

raise

549

771

self.checker = None

550

772

773

551

774

def dbus_service_property(dbus_interface, signature="v",

552

775

access="readwrite", byte_arrays=False):

553

776

"""Decorators for marking methods of a DBusObjectWithProperties to

564

787

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

565

788

if byte_arrays and signature != "ay":

566

789

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

567

" signature %r" % signature)

790

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

568

791

def decorator(func):

569

792

func._dbus_is_property = True

570

793

func._dbus_interface = dbus_interface

578

801

return decorator

579

802

580

803

804

def dbus_interface_annotations(dbus_interface):

805

"""Decorator for marking functions returning interface annotations

806

807

Usage:

808

809

@dbus_interface_annotations("org.example.Interface")

810

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

811

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

812

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

813

"false"}

814

"""

815

def decorator(func):

816

func._dbus_is_interface = True

817

func._dbus_interface = dbus_interface

818

func._dbus_name = dbus_interface

819

return func

820

return decorator

821

822

823

def dbus_annotations(annotations):

824

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

825

Usage:

826

827

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

828

access="r")

829

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

830

"org.freedesktop.DBus.Property."

831

"EmitsChangedSignal": "false"})

832

def Property_dbus_property(self):

833

return dbus.Boolean(False)

834

"""

835

def decorator(func):

836

func._dbus_annotations = annotations

837

return func

838

return decorator

839

840

581

841

class DBusPropertyException(dbus.exceptions.DBusException):

582

842

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

583

843

"""

599

859

600

860

class DBusObjectWithProperties(dbus.service.Object):

601

861

"""A D-Bus object with properties.

602

862

603

863

Classes inheriting from this can use the dbus_service_property

604

864

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

605

865

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

606

866

"""

607

867

608

868

@staticmethod

609

def _is_dbus_property(obj):

610

return getattr(obj, "_dbus_is_property", False)

869

def _is_dbus_thing(thing):

870

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

871

872

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

873

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

874

"""

875

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

876

False)

611

877

612

def _get_all_dbus_properties(self):

878

def _get_all_dbus_things(self, thing):

613

879

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

614

880

"""

615

return ((prop._dbus_name, prop)

616

for name, prop in

617

inspect.getmembers(self, self._is_dbus_property))

881

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

882

name),

883

athing.__get__(self))

884

for cls in self.__class__.__mro__

885

for name, athing in

886

inspect.getmembers(cls,

887

self._is_dbus_thing(thing)))

618

888

619

889

def _get_dbus_property(self, interface_name, property_name):

620

890

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

621

891

property with the specified name and interface.

622

892

"""

623

for name in (property_name,

624

property_name + "_dbus_property"):

625

prop = getattr(self, name, None)

626

if (prop is None

627

or not self._is_dbus_property(prop)

628

or prop._dbus_name != property_name

629

or (interface_name and prop._dbus_interface

630

and interface_name != prop._dbus_interface)):

631

continue

632

return prop

893

for cls in self.__class__.__mro__:

894

for name, value in (inspect.getmembers

895

(cls,

896

self._is_dbus_thing("property"))):

897

if (value._dbus_name == property_name

898

and value._dbus_interface == interface_name):

899

return value.__get__(self)

900

633

901

# No such property

634

902

raise DBusPropertyNotFound(self.dbus_object_path + ":"

635

903

+ interface_name + "."

660

928

# signatures other than "ay".

661

929

if prop._dbus_signature != "ay":

662

930

raise ValueError

663

value = dbus.ByteArray(''.join(unichr(byte)

664

for byte in value))

931

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

932

for byte in value))

665

933

prop(value)

666

934

667

935

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

669

937

def GetAll(self, interface_name):

670

938

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

671

939

standard.

672

940

673

941

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

674

942

"""

675

all = {}

676

for name, prop in self._get_all_dbus_properties():

943

properties = {}

944

for name, prop in self._get_all_dbus_things("property"):

677

945

if (interface_name

678

946

and interface_name != prop._dbus_interface):

679

947

# Interface non-empty but did not match

683

951

continue

684

952

value = prop()

685

953

if not hasattr(value, "variant_level"):

686

all[name] = value

954

properties[name] = value

687

955

continue

688

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

689

value.variant_level+1)

690

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

956

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

957

value.variant_level+1)

958

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

691

959

692

960

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

693

961

out_signature="s",

694

962

path_keyword='object_path',

695

963

connection_keyword='connection')

696

964

def Introspect(self, object_path, connection):

697

"""Standard D-Bus method, overloaded to insert property tags.

965

"""Overloading of standard D-Bus method.

966

967

Inserts property tags and interface annotation tags.

698

968

"""

699

969

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

700

970

connection)

707

977

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

708

978

return e

709

979

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

980

# Add property tags

710

981

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

711

982

for name, prop

712

in self._get_all_dbus_properties()

983

in self._get_all_dbus_things("property")

713

984

if prop._dbus_interface

714

985

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

715

986

if_tag.appendChild(tag)

987

# Add annotation tags

988

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

989

for tag in if_tag.getElementsByTagName(typ):

990

annots = dict()

991

for name, prop in (self.

992

_get_all_dbus_things(typ)):

993

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

994

and prop._dbus_interface

995

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

996

annots.update(getattr

997

(prop,

998

"_dbus_annotations",

999

{}))

1000

for name, value in annots.iteritems():

1001

ann_tag = document.createElement(

1002

"annotation")

1003

ann_tag.setAttribute("name", name)

1004

ann_tag.setAttribute("value", value)

1005

tag.appendChild(ann_tag)

1006

# Add interface annotation tags

1007

for annotation, value in dict(

1008

itertools.chain.from_iterable(

1009

annotations().iteritems()

1010

for name, annotations in

1011

self._get_all_dbus_things("interface")

1012

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

1013

)).iteritems():

1014

ann_tag = document.createElement("annotation")

1015

ann_tag.setAttribute("name", annotation)

1016

ann_tag.setAttribute("value", value)

1017

if_tag.appendChild(ann_tag)

716

1018

# Add the names to the return values for the

717

1019

# "org.freedesktop.DBus.Properties" methods

718

1020

if (if_tag.getAttribute("name")

733

1035

except (AttributeError, xml.dom.DOMException,

734

1036

xml.parsers.expat.ExpatError) as error:

735

1037

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

736

error)

1038

exc_info=error)

737

1039

return xmlstring

738

1040

739

1041

1042

def datetime_to_dbus(dt, variant_level=0):

1043

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

1044

if dt is None:

1045

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

1046

return dbus.String(dt.isoformat(),

1047

variant_level=variant_level)

1048

1049

1050

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1051

"""A class decorator; applied to a subclass of

1052

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

1053

interface names according to the "alt_interface_names" mapping.

1054

Usage:

1055

1056

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

1057

"net.example.AlternateInterface"})

1058

class SampleDBusObject(dbus.service.Object):

1059

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

1060

def SampleDBusMethod():

1061

pass

1062

1063

The above "SampleDBusMethod" on "SampleDBusObject" will be

1064

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

1065

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

1066

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

1067

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

1068

1069

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

1070

(from DBusObjectWithProperties) and interfaces (from the

1071

dbus_interface_annotations decorator).

1072

"""

1073

def wrapper(cls):

1074

for orig_interface_name, alt_interface_name in (

1075

alt_interface_names.iteritems()):

1076

attr = {}

1077

interface_names = set()

1078

# Go though all attributes of the class

1079

for attrname, attribute in inspect.getmembers(cls):

1080

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

1081

# with the wrong interface name

1082

if (not hasattr(attribute, "_dbus_interface")

1083

or not attribute._dbus_interface

1084

.startswith(orig_interface_name)):

1085

continue

1086

# Create an alternate D-Bus interface name based on

1087

# the current name

1088

alt_interface = (attribute._dbus_interface

1089

.replace(orig_interface_name,

1090

alt_interface_name))

1091

interface_names.add(alt_interface)

1092

# Is this a D-Bus signal?

1093

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

1094

# Extract the original non-method undecorated

1095

# function by black magic

1096

nonmethod_func = (dict(

1097

zip(attribute.func_code.co_freevars,

1098

attribute.__closure__))["func"]

1099

.cell_contents)

1100

# Create a new, but exactly alike, function

1101

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

1102

# with the alternate D-Bus interface name

1103

new_function = (dbus.service.signal

1104

(alt_interface,

1105

attribute._dbus_signature)

1106

(types.FunctionType(

1107

nonmethod_func.func_code,

1108

nonmethod_func.func_globals,

1109

nonmethod_func.func_name,

1110

nonmethod_func.func_defaults,

1111

nonmethod_func.func_closure)))

1112

# Copy annotations, if any

1113

try:

1114

new_function._dbus_annotations = (

1115

dict(attribute._dbus_annotations))

1116

except AttributeError:

1117

pass

1118

# Define a creator of a function to call both the

1119

# original and alternate functions, so both the

1120

# original and alternate signals gets sent when

1121

# the function is called

1122

def fixscope(func1, func2):

1123

"""This function is a scope container to pass

1124

func1 and func2 to the "call_both" function

1125

outside of its arguments"""

1126

def call_both(*args, **kwargs):

1127

"""This function will emit two D-Bus

1128

signals by calling func1 and func2"""

1129

func1(*args, **kwargs)

1130

func2(*args, **kwargs)

1131

return call_both

1132

# Create the "call_both" function and add it to

1133

# the class

1134

attr[attrname] = fixscope(attribute, new_function)

1135

# Is this a D-Bus method?

1136

elif getattr(attribute, "_dbus_is_method", False):

1137

# Create a new, but exactly alike, function

1138

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

1139

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

1140

# to the class.

1141

attr[attrname] = (dbus.service.method

1142

(alt_interface,

1143

attribute._dbus_in_signature,

1144

attribute._dbus_out_signature)

1145

(types.FunctionType

1146

(attribute.func_code,

1147

attribute.func_globals,

1148

attribute.func_name,

1149

attribute.func_defaults,

1150

attribute.func_closure)))

1151

# Copy annotations, if any

1152

try:

1153

attr[attrname]._dbus_annotations = (

1154

dict(attribute._dbus_annotations))

1155

except AttributeError:

1156

pass

1157

# Is this a D-Bus property?

1158

elif getattr(attribute, "_dbus_is_property", False):

1159

# Create a new, but exactly alike, function

1160

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

1161

# property with the alternate D-Bus interface

1162

# name. Add it to the class.

1163

attr[attrname] = (dbus_service_property

1164

(alt_interface,

1165

attribute._dbus_signature,

1166

attribute._dbus_access,

1167

attribute

1168

._dbus_get_args_options

1169

["byte_arrays"])

1170

(types.FunctionType

1171

(attribute.func_code,

1172

attribute.func_globals,

1173

attribute.func_name,

1174

attribute.func_defaults,

1175

attribute.func_closure)))

1176

# Copy annotations, if any

1177

try:

1178

attr[attrname]._dbus_annotations = (

1179

dict(attribute._dbus_annotations))

1180

except AttributeError:

1181

pass

1182

# Is this a D-Bus interface?

1183

elif getattr(attribute, "_dbus_is_interface", False):

1184

# Create a new, but exactly alike, function

1185

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

1186

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

1187

# to the class.

1188

attr[attrname] = (dbus_interface_annotations

1189

(alt_interface)

1190

(types.FunctionType

1191

(attribute.func_code,

1192

attribute.func_globals,

1193

attribute.func_name,

1194

attribute.func_defaults,

1195

attribute.func_closure)))

1196

if deprecate:

1197

# Deprecate all alternate interfaces

1198

iname="_AlternateDBusNames_interface_annotation{0}"

1199

for interface_name in interface_names:

1200

@dbus_interface_annotations(interface_name)

1201

def func(self):

1202

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

1203

"true" }

1204

# Find an unused name

1205

for aname in (iname.format(i)

1206

for i in itertools.count()):

1207

if aname not in attr:

1208

attr[aname] = func

1209

break

1210

if interface_names:

1211

# Replace the class with a new subclass of it with

1212

# methods, signals, etc. as created above.

1213

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

1214

(cls,), attr)

1215

return cls

1216

return wrapper

1217

1218

1219

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

1220

"se.bsnet.fukt.Mandos"})

740

1221

class ClientDBus(Client, DBusObjectWithProperties):

741

1222

"""A Client class using D-Bus

742

1223

751

1232

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

752

1233

753

1234

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

754

self._approvals_pending = 0

755

1235

self.bus = bus

756

1236

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

757

1237

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

763

1243

("/clients/" + client_object_name))

764

1244

DBusObjectWithProperties.__init__(self, self.bus,

765

1245

self.dbus_object_path)

766

767

def _get_approvals_pending(self):

768

return self._approvals_pending

769

def _set_approvals_pending(self, value):

770

old_value = self._approvals_pending

771

self._approvals_pending = value

772

bval = bool(value)

773

if (hasattr(self, "dbus_object_path")

774

and bval is not bool(old_value)):

775

dbus_bool = dbus.Boolean(bval, variant_level=1)

776

self.PropertyChanged(dbus.String("ApprovalPending"),

777

dbus_bool)

778

779

approvals_pending = property(_get_approvals_pending,

780

_set_approvals_pending)

781

del _get_approvals_pending, _set_approvals_pending

782

783

@staticmethod

784

def _datetime_to_dbus(dt, variant_level=0):

785

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

786

return dbus.String(dt.isoformat(),

787

variant_level=variant_level)

788

789

def enable(self):

790

oldstate = getattr(self, "enabled", False)

791

r = Client.enable(self)

792

if oldstate != self.enabled:

793

# Emit D-Bus signals

794

self.PropertyChanged(dbus.String("Enabled"),

795

dbus.Boolean(True, variant_level=1))

796

self.PropertyChanged(

797

dbus.String("LastEnabled"),

798

self._datetime_to_dbus(self.last_enabled,

799

variant_level=1))

800

return r

801

802

def disable(self, quiet = False):

803

oldstate = getattr(self, "enabled", False)

804

r = Client.disable(self, quiet=quiet)

805

if not quiet and oldstate != self.enabled:

806

# Emit D-Bus signal

807

self.PropertyChanged(dbus.String("Enabled"),

808

dbus.Boolean(False, variant_level=1))

809

return r

1246

1247

def notifychangeproperty(transform_func,

1248

dbus_name, type_func=lambda x: x,

1249

variant_level=1):

1250

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

1251

its changes to DBus.

1252

1253

transform_fun: Function that takes a value and a variant_level

1254

and transforms it to a D-Bus type.

1255

dbus_name: D-Bus name of the variable

1256

type_func: Function that transform the value before sending it

1257

to the D-Bus. Default: no transform

1258

variant_level: D-Bus variant level. Default: 1

1259

"""

1260

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

1261

def setter(self, value):

1262

if hasattr(self, "dbus_object_path"):

1263

if (not hasattr(self, attrname) or

1264

type_func(getattr(self, attrname, None))

1265

!= type_func(value)):

1266

dbus_value = transform_func(type_func(value),

1267

variant_level

1268

=variant_level)

1269

self.PropertyChanged(dbus.String(dbus_name),

1270

dbus_value)

1271

setattr(self, attrname, value)

1272

1273

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

1274

1275

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1276

approvals_pending = notifychangeproperty(dbus.Boolean,

1277

"ApprovalPending",

1278

type_func = bool)

1279

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

1280

last_enabled = notifychangeproperty(datetime_to_dbus,

1281

"LastEnabled")

1282

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

1283

type_func = lambda checker:

1284

checker is not None)

1285

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1286

"LastCheckedOK")

1287

last_checker_status = notifychangeproperty(dbus.Int16,

1288

"LastCheckerStatus")

1289

last_approval_request = notifychangeproperty(

1290

datetime_to_dbus, "LastApprovalRequest")

1291

approved_by_default = notifychangeproperty(dbus.Boolean,

1292

"ApprovedByDefault")

1293

approval_delay = notifychangeproperty(dbus.UInt64,

1294

"ApprovalDelay",

1295

type_func =

1296

timedelta_to_milliseconds)

1297

approval_duration = notifychangeproperty(

1298

dbus.UInt64, "ApprovalDuration",

1299

type_func = timedelta_to_milliseconds)

1300

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

1301

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

1302

type_func =

1303

timedelta_to_milliseconds)

1304

extended_timeout = notifychangeproperty(

1305

dbus.UInt64, "ExtendedTimeout",

1306

type_func = timedelta_to_milliseconds)

1307

interval = notifychangeproperty(dbus.UInt64,

1308

"Interval",

1309

type_func =

1310

timedelta_to_milliseconds)

1311

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

1312

1313

del notifychangeproperty

810

1314

811

1315

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

812

1316

try:

821

1325

*args, **kwargs):

822

1326

self.checker_callback_tag = None

823

1327

self.checker = None

824

# Emit D-Bus signal

825

self.PropertyChanged(dbus.String("CheckerRunning"),

826

dbus.Boolean(False, variant_level=1))

827

1328

if os.WIFEXITED(condition):

828

1329

exitstatus = os.WEXITSTATUS(condition)

829

1330

# Emit D-Bus signal

839

1340

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

840

1341

*args, **kwargs)

841

1342

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastCheckedOK"),

847

(self._datetime_to_dbus(self.last_checked_ok,

848

variant_level=1)))

849

850

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

851

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

852

# Emit D-Bus signal

853

self.PropertyChanged(

854

dbus.String("LastApprovalRequest"),

855

(self._datetime_to_dbus(self.last_approval_request,

856

variant_level=1)))

857

return r

858

859

1343

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

860

1344

old_checker = self.checker

861

1345

if self.checker is not None:

868

1352

and old_checker_pid != self.checker.pid):

869

1353

# Emit D-Bus signal

870

1354

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

874

1355

return r

875

1356

876

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

877

old_checker = getattr(self, "checker", None)

878

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

879

if (old_checker is not None

880

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

881

self.PropertyChanged(dbus.String("CheckerRunning"),

882

dbus.Boolean(False, variant_level=1))

883

return r

884

885

1357

def _reset_approved(self):

886

self._approved = None

1358

self.approved = None

887

1359

return False

888

1360

889

1361

def approve(self, value=True):

890

self.send_changedstate()

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

1362

self.approved = value

1363

gobject.timeout_add(timedelta_to_milliseconds

893

1364

(self.approval_duration),

894

1365

self._reset_approved)

895

1366

self.send_changedstate()

896

1367

897

1368

## D-Bus methods, signals & properties

898

_interface = "se.bsnet.fukt.Mandos.Client"

1369

_interface = "se.recompile.Mandos.Client"

1370

1371

## Interfaces

1372

1373

@dbus_interface_annotations(_interface)

1374

def _foo(self):

1375

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

1376

"false"}

899

1377

900

1378

## Signals

901

1379

987

1465

if value is None: # get

988

1466

return dbus.Boolean(self.approved_by_default)

989

1467

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

self.PropertyChanged(dbus.String("ApprovedByDefault"),

992

dbus.Boolean(value, variant_level=1))

993

1468

994

1469

# ApprovalDelay - property

995

1470

@dbus_service_property(_interface, signature="t",

998

1473

if value is None: # get

999

1474

return dbus.UInt64(self.approval_delay_milliseconds())

1000

1475

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

1001

# Emit D-Bus signal

1002

self.PropertyChanged(dbus.String("ApprovalDelay"),

1003

dbus.UInt64(value, variant_level=1))

1004

1476

1005

1477

# ApprovalDuration - property

1006

1478

@dbus_service_property(_interface, signature="t",

1007

1479

access="readwrite")

1008

1480

def ApprovalDuration_dbus_property(self, value=None):

1009

1481

if value is None: # get

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1482

return dbus.UInt64(timedelta_to_milliseconds(

1011

1483

self.approval_duration))

1012

1484

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

1013

# Emit D-Bus signal

1014

self.PropertyChanged(dbus.String("ApprovalDuration"),

1015

dbus.UInt64(value, variant_level=1))

1016

1485

1017

1486

# Name - property

1018

1487

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

1030

1499

def Host_dbus_property(self, value=None):

1031

1500

if value is None: # get

1032

1501

return dbus.String(self.host)

1033

self.host = value

1034

# Emit D-Bus signal

1035

self.PropertyChanged(dbus.String("Host"),

1036

dbus.String(value, variant_level=1))

1502

self.host = unicode(value)

1037

1503

1038

1504

# Created - property

1039

1505

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

1040

1506

def Created_dbus_property(self):

1041

return dbus.String(self._datetime_to_dbus(self.created))

1507

return datetime_to_dbus(self.created)

1042

1508

1043

1509

# LastEnabled - property

1044

1510

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

1045

1511

def LastEnabled_dbus_property(self):

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

return dbus.String(self._datetime_to_dbus(self.last_enabled))

1512

return datetime_to_dbus(self.last_enabled)

1049

1513

1050

1514

# Enabled - property

1051

1515

@dbus_service_property(_interface, signature="b",

1065

1529

if value is not None:

1066

1530

self.checked_ok()

1067

1531

return

1068

if self.last_checked_ok is None:

1069

return dbus.String("")

1070

return dbus.String(self._datetime_to_dbus(self

1071

.last_checked_ok))

1532

return datetime_to_dbus(self.last_checked_ok)

1533

1534

# LastCheckerStatus - property

1535

@dbus_service_property(_interface, signature="n",

1536

access="read")

1537

def LastCheckerStatus_dbus_property(self):

1538

return dbus.Int16(self.last_checker_status)

1539

1540

# Expires - property

1541

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

1542

def Expires_dbus_property(self):

1543

return datetime_to_dbus(self.expires)

1072

1544

1073

1545

# LastApprovalRequest - property

1074

1546

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

1075

1547

def LastApprovalRequest_dbus_property(self):

1076

if self.last_approval_request is None:

1077

return dbus.String("")

1078

return dbus.String(self.

1079

_datetime_to_dbus(self

1080

.last_approval_request))

1548

return datetime_to_dbus(self.last_approval_request)

1081

1549

1082

1550

# Timeout - property

1083

1551

@dbus_service_property(_interface, signature="t",

1085

1553

def Timeout_dbus_property(self, value=None):

1086

1554

if value is None: # get

1087

1555

return dbus.UInt64(self.timeout_milliseconds())

1556

old_timeout = self.timeout

1088

1557

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

1089

# Emit D-Bus signal

1090

self.PropertyChanged(dbus.String("Timeout"),

1091

dbus.UInt64(value, variant_level=1))

1092

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

1093

return

1094

# Reschedule timeout

1095

gobject.source_remove(self.disable_initiator_tag)

1096

self.disable_initiator_tag = None

1097

time_to_die = (self.

1098

_timedelta_to_milliseconds((self

1099

.last_checked_ok

1100

+ self.timeout)

1101

- datetime.datetime

1102

.utcnow()))

1103

if time_to_die <= 0:

1104

# The timeout has passed

1105

self.disable()

1106

else:

1107

self.disable_initiator_tag = (gobject.timeout_add

1108

(time_to_die, self.disable))

1558

# Reschedule disabling

1559

if self.enabled:

1560

now = datetime.datetime.utcnow()

1561

self.expires += self.timeout - old_timeout

1562

if self.expires <= now:

1563

# The timeout has passed

1564

self.disable()

1565

else:

1566

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

1567

is None):

1568

return

1569

gobject.source_remove(self.disable_initiator_tag)

1570

self.disable_initiator_tag = (

1571

gobject.timeout_add(

1572

timedelta_to_milliseconds(self.expires - now),

1573

self.disable))

1574

1575

# ExtendedTimeout - property

1576

@dbus_service_property(_interface, signature="t",

1577

access="readwrite")

1578

def ExtendedTimeout_dbus_property(self, value=None):

1579

if value is None: # get

1580

return dbus.UInt64(self.extended_timeout_milliseconds())

1581

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

1109

1582

1110

1583

# Interval - property

1111

1584

@dbus_service_property(_interface, signature="t",

1114

1587

if value is None: # get

1115

1588

return dbus.UInt64(self.interval_milliseconds())

1116

1589

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

1117

# Emit D-Bus signal

1118

self.PropertyChanged(dbus.String("Interval"),

1119

dbus.UInt64(value, variant_level=1))

1120

1590

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

1121

1591

return

1122

# Reschedule checker run

1123

gobject.source_remove(self.checker_initiator_tag)

1124

self.checker_initiator_tag = (gobject.timeout_add

1125

(value, self.start_checker))

1126

self.start_checker() # Start one now, too

1127

1592

if self.enabled:

1593

# Reschedule checker run

1594

gobject.source_remove(self.checker_initiator_tag)

1595

self.checker_initiator_tag = (gobject.timeout_add

1596

(value, self.start_checker))

1597

self.start_checker() # Start one now, too

1598

1128

1599

# Checker - property

1129

1600

@dbus_service_property(_interface, signature="s",

1130

1601

access="readwrite")

1131

1602

def Checker_dbus_property(self, value=None):

1132

1603

if value is None: # get

1133

1604

return dbus.String(self.checker_command)

1134

self.checker_command = value

1135

# Emit D-Bus signal

1136

self.PropertyChanged(dbus.String("Checker"),

1137

dbus.String(self.checker_command,

1138

variant_level=1))

1605

self.checker_command = unicode(value)

1139

1606

1140

1607

# CheckerRunning - property

1141

1608

@dbus_service_property(_interface, signature="b",

1168

1635

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

1169

1636

if not self._pipe.recv():

1170

1637

raise KeyError()

1171

1638

1172

1639

def __getattribute__(self, name):

1173

if(name == '_pipe'):

1640

if name == '_pipe':

1174

1641

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

1175

1642

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

1176

1643

data = self._pipe.recv()

1181

1648

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

1182

1649

return self._pipe.recv()[1]

1183

1650

return func

1184

1651

1185

1652

def __setattr__(self, name, value):

1186

if(name == '_pipe'):

1653

if name == '_pipe':

1187

1654

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

1188

1655

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

1189

1656

1200

1667

unicode(self.client_address))

1201

1668

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

1202

1669

self.server.child_pipe.fileno())

1203

1670

1204

1671

session = (gnutls.connection

1205

1672

.ClientSession(self.request,

1206

1673

gnutls.connection

1207

1674

.X509Credentials()))

1208

1675

1209

1676

# Note: gnutls.connection.X509Credentials is really a

1210

1677

# generic GnuTLS certificate credentials object so long as

1211

1678

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

1212

1679

# here despite using OpenPGP certificates.

1213

1680

1214

1681

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

1215

1682

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

1216

1683

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

1222

1689

(gnutls.library.functions

1223

1690

.gnutls_priority_set_direct(session._c_object,

1224

1691

priority, None))

1225

1692

1226

1693

# Start communication using the Mandos protocol

1227

1694

# Get protocol number

1228

1695

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

1233

1700

except (ValueError, IndexError, RuntimeError) as error:

1234

1701

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

1235

1702

return

1236

1703

1237

1704

# Start GnuTLS connection

1238

1705

try:

1239

1706

session.handshake()

1243

1710

# established. Just abandon the request.

1244

1711

return

1245

1712

logger.debug("Handshake succeeded")

1246

1713

1247

1714

approval_required = False

1248

1715

try:

1249

1716

try:

1254

1721

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

1255

1722

return

1256

1723

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

1257

1724

1258

1725

try:

1259

1726

client = ProxyClient(child_pipe, fpr,

1260

1727

self.client_address)

1272

1739

client.name)

1273

1740

if self.server.use_dbus:

1274

1741

# Emit D-Bus signal

1275

client.Rejected("Disabled")

1742

client.Rejected("Disabled")

1276

1743

return

1277

1744

1278

if client._approved or not client.approval_delay:

1745

if client.approved or not client.approval_delay:

1279

1746

#We are approved or approval is disabled

1280

1747

break

1281

elif client._approved is None:

1748

elif client.approved is None:

1282

1749

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

1283

1750

client.name)

1284

1751

if self.server.use_dbus:

1295

1762

return

1296

1763

1297

1764

#wait until timeout or approved

1298

#x = float(client._timedelta_to_milliseconds(delay))

1299

1765

time = datetime.datetime.now()

1300

1766

client.changedstate.acquire()

1301

client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))

1767

client.changedstate.wait(

1768

float(timedelta_to_milliseconds(delay)

1769

/ 1000))

1302

1770

client.changedstate.release()

1303

1771

time2 = datetime.datetime.now()

1304

1772

if (time2 - time) >= delay:

1320

1788

try:

1321

1789

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

1322

1790

except gnutls.errors.GNUTLSError as error:

1323

logger.warning("gnutls send failed")

1791

logger.warning("gnutls send failed",

1792

exc_info=error)

1324

1793

return

1325

1794

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

1326

1795

sent, len(client.secret)

1327

1796

- (sent_size + sent))

1328

1797

sent_size += sent

1329

1798

1330

1799

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

1331

# bump the timeout as if seen

1332

client.checked_ok()

1800

# bump the timeout using extended_timeout

1801

client.bump_timeout(client.extended_timeout)

1333

1802

if self.server.use_dbus:

1334

1803

# Emit D-Bus signal

1335

1804

client.GotSecret()

1340

1809

try:

1341

1810

session.bye()

1342

1811

except gnutls.errors.GNUTLSError as error:

1343

logger.warning("GnuTLS bye failed")

1812

logger.warning("GnuTLS bye failed",

1813

exc_info=error)

1344

1814

1345

1815

@staticmethod

1346

1816

def peer_certificate(session):

1402

1872

# Convert the buffer to a Python bytestring

1403

1873

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

1404

1874

# Convert the bytestring to hexadecimal notation

1405

hex_fpr = ''.join("%02X" % ord(char) for char in fpr)

1875

hex_fpr = binascii.hexlify(fpr).upper()

1406

1876

return hex_fpr

1407

1877

1408

1878

1411

1881

def sub_process_main(self, request, address):

1412

1882

try:

1413

1883

self.finish_request(request, address)

1414

except:

1884

except Exception:

1415

1885

self.handle_error(request, address)

1416

1886

self.close_request(request)

1417

1887

1418

1888

def process_request(self, request, address):

1419

1889

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

1420

multiprocessing.Process(target = self.sub_process_main,

1421

args = (request, address)).start()

1890

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

1891

args = (request, address))

1892

proc.start()

1893

return proc

1894

1422

1895

1423

1896

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1424

1897

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

1428

1901

This function creates a new pipe in self.pipe

1429

1902

"""

1430

1903

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

1904

1905

proc = MultiprocessingMixIn.process_request(self, request,

1906

client_address)

1434

1907

self.child_pipe.close()

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

1908

self.add_pipe(parent_pipe, proc)

1909

1910

def add_pipe(self, parent_pipe, proc):

1438

1911

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

1439

1912

raise NotImplementedError

1440

1913

1914

1441

1915

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1442

1916

socketserver.TCPServer, object):

1443

1917

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

1448

1922

use_ipv6: Boolean; to use IPv6 or not

1449

1923

"""

1450

1924

def __init__(self, server_address, RequestHandlerClass,

1451

interface=None, use_ipv6=True):

1925

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

1926

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

1927

creating a new one with socket.socket().

1928

"""

1452

1929

self.interface = interface

1453

1930

if use_ipv6:

1454

1931

self.address_family = socket.AF_INET6

1932

if socketfd is not None:

1933

# Save the file descriptor

1934

self.socketfd = socketfd

1935

# Save the original socket.socket() function

1936

self.socket_socket = socket.socket

1937

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

1938

#

1939

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

1940

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

1941

# patching socket.socket.)

1942

#

1943

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

1944

@functools.wraps(socket.socket)

1945

def socket_wrapper(*args, **kwargs):

1946

# Restore original function so subsequent calls are

1947

# not affected.

1948

socket.socket = self.socket_socket

1949

del self.socket_socket

1950

# This time only, return a new socket object from the

1951

# saved file descriptor.

1952

return socket.fromfd(self.socketfd, *args, **kwargs)

1953

# Replace socket.socket() function with wrapper

1954

socket.socket = socket_wrapper

1955

# The socketserver.TCPServer.__init__ will call

1956

# socket.socket(), which might be our replacement,

1957

# socket_wrapper(), if socketfd was set.

1455

1958

socketserver.TCPServer.__init__(self, server_address,

1456

1959

RequestHandlerClass)

1960

1457

1961

def server_bind(self):

1458

1962

"""This overrides the normal server_bind() function

1459

1963

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

1467

1971

try:

1468

1972

self.socket.setsockopt(socket.SOL_SOCKET,

1469

1973

SO_BINDTODEVICE,

1470

str(self.interface

1471

+ '\0'))

1974

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

1472

1975

except socket.error as error:

1473

if error[0] == errno.EPERM:

1474

logger.error("No permission to"

1475

" bind to interface %s",

1476

self.interface)

1477

elif error[0] == errno.ENOPROTOOPT:

1976

if error.errno == errno.EPERM:

1977

logger.error("No permission to bind to"

1978

" interface %s", self.interface)

1979

elif error.errno == errno.ENOPROTOOPT:

1478

1980

logger.error("SO_BINDTODEVICE not available;"

1479

1981

" cannot bind to interface %s",

1480

1982

self.interface)

1983

elif error.errno == errno.ENODEV:

1984

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

1985

" cannot bind", self.interface)

1481

1986

else:

1482

1987

raise

1483

1988

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

1486

1991

if self.address_family == socket.AF_INET6:

1487

1992

any_address = "::" # in6addr_any

1488

1993

else:

1489

any_address = socket.INADDR_ANY

1994

any_address = "0.0.0.0" # INADDR_ANY

1490

1995

self.server_address = (any_address,

1491

1996

self.server_address[1])

1492

1997

elif not self.server_address[1]:

1513

2018

"""

1514

2019

def __init__(self, server_address, RequestHandlerClass,

1515

2020

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

1516

gnutls_priority=None, use_dbus=True):

2021

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

1517

2022

self.enabled = False

1518

2023

self.clients = clients

1519

2024

if self.clients is None:

1520

self.clients = set()

2025

self.clients = {}

1521

2026

self.use_dbus = use_dbus

1522

2027

self.gnutls_priority = gnutls_priority

1523

2028

IPv6_TCPServer.__init__(self, server_address,

1524

2029

RequestHandlerClass,

1525

2030

interface = interface,

1526

use_ipv6 = use_ipv6)

2031

use_ipv6 = use_ipv6,

2032

socketfd = socketfd)

1527

2033

def server_activate(self):

1528

2034

if self.enabled:

1529

2035

return socketserver.TCPServer.server_activate(self)

2036

1530

2037

def enable(self):

1531

2038

self.enabled = True

1532

def add_pipe(self, parent_pipe):

2039

2040

def add_pipe(self, parent_pipe, proc):

1533

2041

# Call "handle_ipc" for both data and EOF events

1534

2042

gobject.io_add_watch(parent_pipe.fileno(),

1535

2043

gobject.IO_IN | gobject.IO_HUP,

1536

2044

functools.partial(self.handle_ipc,

1537

parent_pipe = parent_pipe))

1538

2045

parent_pipe =

2046

parent_pipe,

2047

proc = proc))

2048

1539

2049

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

1540

client_object=None):

1541

condition_names = {

1542

gobject.IO_IN: "IN", # There is data to read.

1543

gobject.IO_OUT: "OUT", # Data can be written (without

1544

# blocking).

1545

gobject.IO_PRI: "PRI", # There is urgent data to read.

1546

gobject.IO_ERR: "ERR", # Error condition.

1547

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1548

# broken, usually for pipes and

1549

# sockets).

1550

}

1551

conditions_string = ' | '.join(name

1552

for cond, name in

1553

condition_names.iteritems()

1554

if cond & condition)

1555

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

1556

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

2050

proc = None, client_object=None):

2051

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

2052

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

2053

# Wait for other process to exit

2054

proc.join()

1557

2055

return False

1558

2056

1559

2057

# Read a request from the child

1564

2062

fpr = request[1]

1565

2063

address = request[2]

1566

2064

1567

for c in self.clients:

2065

for c in self.clients.itervalues():

1568

2066

if c.fingerprint == fpr:

1569

2067

client = c

1570

2068

break

1573

2071

"dress: %s", fpr, address)

1574

2072

if self.use_dbus:

1575

2073

# Emit D-Bus signal

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

2074

mandos_dbus_service.ClientNotFound(fpr,

2075

address[0])

1577

2076

parent_pipe.send(False)

1578

2077

return False

1579

2078

1580

2079

gobject.io_add_watch(parent_pipe.fileno(),

1581

2080

gobject.IO_IN | gobject.IO_HUP,

1582

2081

functools.partial(self.handle_ipc,

1583

parent_pipe = parent_pipe,

1584

client_object = client))

2082

parent_pipe =

2083

parent_pipe,

2084

proc = proc,

2085

client_object =

2086

client))

1585

2087

parent_pipe.send(True)

1586

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

2088

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

2089

# same fileno

1587

2090

return False

1588

2091

if command == 'funcall':

1589

2092

funcname = request[1]

1590

2093

args = request[2]

1591

2094

kwargs = request[3]

1592

2095

1593

parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))

1594

2096

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

2097

funcname)(*args,

2098

**kwargs)))

2099

1595

2100

if command == 'getattr':

1596

2101

attrname = request[1]

1597

2102

if callable(client_object.__getattribute__(attrname)):

1598

2103

parent_pipe.send(('function',))

1599

2104

else:

1600

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

2105

parent_pipe.send(('data', client_object

2106

.__getattribute__(attrname)))

1601

2107

1602

2108

if command == 'setattr':

1603

2109

attrname = request[1]

1604

2110

value = request[2]

1605

2111

setattr(client_object, attrname, value)

1606

2112

1607

2113

return True

1608

2114

1609

2115

2116

def rfc3339_duration_to_delta(duration):

2117

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

2118

2119

>>> rfc3339_duration_to_delta("P7D")

2120

datetime.timedelta(7)

2121

>>> rfc3339_duration_to_delta("PT60S")

2122

datetime.timedelta(0, 60)

2123

>>> rfc3339_duration_to_delta("PT60M")

2124

datetime.timedelta(0, 3600)

2125

>>> rfc3339_duration_to_delta("PT24H")

2126

datetime.timedelta(1)

2127

>>> rfc3339_duration_to_delta("P1W")

2128

datetime.timedelta(7)

2129

>>> rfc3339_duration_to_delta("PT5M30S")

2130

datetime.timedelta(0, 330)

2131

>>> rfc3339_duration_to_delta("P1DT3M20S")

2132

datetime.timedelta(1, 200)

2133

"""

2134

2135

# Parsing an RFC 3339 duration with regular expressions is not

2136

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

2137

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

2138

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

2139

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

2140

# avoid excessive use of external libraries.

2141

2142

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

2143

Token = collections.namedtuple("Token",

2144

("regexp", # To match token; if

2145

# "value" is not None,

2146

# must have a "group"

2147

# containing digits

2148

"value", # datetime.timedelta or

2149

# None

2150

"followers")) # Tokens valid after

2151

# this token

2152

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

2153

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

2154

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

2155

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

2156

datetime.timedelta(seconds=1),

2157

frozenset((token_end,)))

2158

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

2159

datetime.timedelta(minutes=1),

2160

frozenset((token_second, token_end)))

2161

token_hour = Token(re.compile(r"(\d+)H"),

2162

datetime.timedelta(hours=1),

2163

frozenset((token_minute, token_end)))

2164

token_time = Token(re.compile(r"T"),

2165

None,

2166

frozenset((token_hour, token_minute,

2167

token_second)))

2168

token_day = Token(re.compile(r"(\d+)D"),

2169

datetime.timedelta(days=1),

2170

frozenset((token_time, token_end)))

2171

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

2172

datetime.timedelta(weeks=4),

2173

frozenset((token_day, token_end)))

2174

token_year = Token(re.compile(r"(\d+)Y"),

2175

datetime.timedelta(weeks=52),

2176

frozenset((token_month, token_end)))

2177

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

2178

datetime.timedelta(weeks=1),

2179

frozenset((token_end,)))

2180

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

2181

frozenset((token_year, token_month,

2182

token_day, token_time,

2183

token_week))),

2184

# Define starting values

2185

value = datetime.timedelta() # Value so far

2186

found_token = None

2187

followers = frozenset(token_duration,) # Following valid tokens

2188

s = duration # String left to parse

2189

# Loop until end token is found

2190

while found_token is not token_end:

2191

# Search for any currently valid tokens

2192

for token in followers:

2193

match = token.regexp.match(s)

2194

if match is not None:

2195

# Token found

2196

if token.value is not None:

2197

# Value found, parse digits

2198

factor = int(match.group(1), 10)

2199

# Add to value so far

2200

value += factor * token.value

2201

# Strip token from string

2202

s = token.regexp.sub("", s, 1)

2203

# Go to found token

2204

found_token = token

2205

# Set valid next tokens

2206

followers = found_token.followers

2207

break

2208

else:

2209

# No currently valid tokens were found

2210

raise ValueError("Invalid RFC 3339 duration")

2211

# End token found

2212

return value

2213

2214

1610

2215

def string_to_delta(interval):

1611

2216

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

1612

2217

1623

2228

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

1624

2229

datetime.timedelta(0, 330)

1625

2230

"""

2231

2232

try:

2233

return rfc3339_duration_to_delta(interval)

2234

except ValueError:

2235

pass

2236

1626

2237

timevalue = datetime.timedelta(0)

1627

2238

for s in interval.split():

1628

2239

try:

1639

2250

elif suffix == "w":

1640

2251

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

1641

2252

else:

1642

raise ValueError("Unknown suffix %r" % suffix)

2253

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

2254

.format(suffix))

1643

2255

except (ValueError, IndexError) as e:

1644

2256

raise ValueError(*(e.args))

1645

2257

timevalue += delta

1646

2258

return timevalue

1647

2259

1648

2260

1649

def if_nametoindex(interface):

1650

"""Call the C function if_nametoindex(), or equivalent

1651

1652

Note: This function cannot accept a unicode string."""

1653

global if_nametoindex

1654

try:

1655

if_nametoindex = (ctypes.cdll.LoadLibrary

1656

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

1657

.if_nametoindex)

1658

except (OSError, AttributeError):

1659

logger.warning("Doing if_nametoindex the hard way")

1660

def if_nametoindex(interface):

1661

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

1662

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

1663

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

1664

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1665

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

1666

interface))

1667

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

1668

ifreq[16:20])[0]

1669

return interface_index

1670

return if_nametoindex(interface)

1671

1672

1673

2261

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

1674

2262

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

1675

2263

1683

2271

sys.exit()

1684

2272

if not noclose:

1685

2273

# Close all standard open file descriptors

1686

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

2274

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

1687

2275

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

1688

2276

raise OSError(errno.ENODEV,

1689

"%s not a character device"

1690

% os.path.devnull)

2277

"{0} not a character device"

2278

.format(os.devnull))

1691

2279

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

1692

2280

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

1693

2281

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

1702

2290

1703

2291

parser = argparse.ArgumentParser()

1704

2292

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

1705

version = "%%(prog)s %s" % version,

2293

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

1706

2294

help="show version number and exit")

1707

2295

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

1708

2296

help="Bind to interface IF")

1714

2302

help="Run self-test")

1715

2303

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

1716

2304

help="Debug mode; run in foreground and log"

1717

" to terminal")

2305

" to terminal", default=None)

1718

2306

parser.add_argument("--debuglevel", metavar="LEVEL",

1719

2307

help="Debug level for stdout output")

1720

2308

parser.add_argument("--priority", help="GnuTLS"

1727

2315

" files")

1728

2316

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

1729

2317

dest="use_dbus", help="Do not provide D-Bus"

1730

" system bus interface")

2318

" system bus interface", default=None)

1731

2319

parser.add_argument("--no-ipv6", action="store_false",

1732

dest="use_ipv6", help="Do not use IPv6")

2320

dest="use_ipv6", help="Do not use IPv6",

2321

default=None)

2322

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

2323

dest="restore", help="Do not restore stored"

2324

" state", default=None)

2325

parser.add_argument("--socket", type=int,

2326

help="Specify a file descriptor to a network"

2327

" socket to use instead of creating one")

2328

parser.add_argument("--statedir", metavar="DIR",

2329

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

2330

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

2331

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

2332

1733

2333

options = parser.parse_args()

1734

2334

1735

2335

if options.check:

1743

2343

"port": "",

1744

2344

"debug": "False",

1745

2345

"priority":

1746

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

2346

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

1747

2347

"servicename": "Mandos",

1748

2348

"use_dbus": "True",

1749

2349

"use_ipv6": "True",

1750

2350

"debuglevel": "",

2351

"restore": "True",

2352

"socket": "",

2353

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

2354

"foreground": "False",

1751

2355

}

1752

2356

1753

2357

# Parse config file for server-global settings

1758

2362

# Convert the SafeConfigParser object to a dict

1759

2363

server_settings = server_config.defaults()

1760

2364

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

1761

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

2365

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

1762

2366

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

1763

2367

option)

1764

2368

if server_settings["port"]:

1765

2369

server_settings["port"] = server_config.getint("DEFAULT",

1766

2370

"port")

2371

if server_settings["socket"]:

2372

server_settings["socket"] = server_config.getint("DEFAULT",

2373

"socket")

2374

# Later, stdin will, and stdout and stderr might, be dup'ed

2375

# over with an opened os.devnull. But we don't want this to

2376

# happen with a supplied network socket.

2377

if 0 <= server_settings["socket"] <= 2:

2378

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

2379

["socket"])

1767

2380

del server_config

1768

2381

1769

2382

# Override the settings from the config file with command line

1770

2383

# options, if set.

1771

2384

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

1772

2385

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

1773

"use_dbus", "use_ipv6", "debuglevel"):

2386

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

2387

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

1774

2388

value = getattr(options, option)

1775

2389

if value is not None:

1776

2390

server_settings[option] = value

1779

2393

for option in server_settings.keys():

1780

2394

if type(server_settings[option]) is str:

1781

2395

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

2396

# Force all boolean options to be boolean

2397

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

2398

"foreground"):

2399

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

2400

# Debug implies foreground

2401

if server_settings["debug"]:

2402

server_settings["foreground"] = True

1782

2403

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

1783

2404

1784

2405

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

1788

2409

debuglevel = server_settings["debuglevel"]

1789

2410

use_dbus = server_settings["use_dbus"]

1790

2411

use_ipv6 = server_settings["use_ipv6"]

1791

2412

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

2413

stored_state_file)

2414

foreground = server_settings["foreground"]

2415

2416

if debug:

2417

initlogger(debug, logging.DEBUG)

2418

else:

2419

if not debuglevel:

2420

initlogger(debug)

2421

else:

2422

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

2423

initlogger(debug, level)

2424

1792

2425

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

1793

2426

syslogger.setFormatter(logging.Formatter

1794

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

1795

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

1796

% server_settings["servicename"]))

2427

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

2428

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

2429

.format(server_settings

2430

["servicename"])))

1797

2431

1798

2432

# Parse config file with clients

1799

client_defaults = { "timeout": "1h",

1800

"interval": "5m",

1801

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

1802

"host": "",

1803

"approval_delay": "0s",

1804

"approval_duration": "1s",

1805

}

1806

client_config = configparser.SafeConfigParser(client_defaults)

2433

client_config = configparser.SafeConfigParser(Client

2434

.client_defaults)

1807

2435

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

1808

2436

"clients.conf"))

1809

2437

1818

2446

use_ipv6=use_ipv6,

1819

2447

gnutls_priority=

1820

2448

server_settings["priority"],

1821

use_dbus=use_dbus)

1822

if not debug:

1823

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

2449

use_dbus=use_dbus,

2450

socketfd=(server_settings["socket"]

2451

or None))

2452

if not foreground:

2453

pidfilename = "/run/mandos.pid"

2454

pidfile = None

1824

2455

try:

1825

2456

pidfile = open(pidfilename, "w")

1826

except IOError:

1827

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

2457

except IOError as e:

2458

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

2459

exc_info=e)

1828

2460

1829

try:

1830

uid = pwd.getpwnam("_mandos").pw_uid

1831

gid = pwd.getpwnam("_mandos").pw_gid

1832

except KeyError:

2461

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

1833

2462

try:

1834

uid = pwd.getpwnam("mandos").pw_uid

1835

gid = pwd.getpwnam("mandos").pw_gid

2463

uid = pwd.getpwnam(name).pw_uid

2464

gid = pwd.getpwnam(name).pw_gid

2465

break

1836

2466

except KeyError:

1837

try:

1838

uid = pwd.getpwnam("nobody").pw_uid

1839

gid = pwd.getpwnam("nobody").pw_gid

1840

except KeyError:

1841

uid = 65534

1842

gid = 65534

2467

continue

2468

else:

2469

uid = 65534

2470

gid = 65534

1843

2471

try:

1844

2472

os.setgid(gid)

1845

2473

os.setuid(uid)

1846

2474

except OSError as error:

1847

if error[0] != errno.EPERM:

2475

if error.errno != errno.EPERM:

1848

2476

raise error

1849

2477

1850

if not debug and not debuglevel:

1851

syslogger.setLevel(logging.WARNING)

1852

console.setLevel(logging.WARNING)

1853

if debuglevel:

1854

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

1855

syslogger.setLevel(level)

1856

console.setLevel(level)

1857

1858

2478

if debug:

1859

2479

# Enable all possible GnuTLS debugging

1860

2480

1870

2490

.gnutls_global_set_log_function(debug_gnutls))

1871

2491

1872

2492

# Redirect stdin so all checkers get /dev/null

1873

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

2493

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

1874

2494

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

1875

2495

if null > 2:

1876

2496

os.close(null)

1877

else:

1878

# No console logging

1879

logger.removeHandler(console)

1880

2497

1881

2498

# Need to fork before connecting to D-Bus

1882

if not debug:

2499

if not foreground:

1883

2500

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

1884

2501

daemon()

1885

2502

2503

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

2504

# need to inform gobject that threads will be used.

2505

gobject.threads_init()

2506

1886

2507

global main_loop

1887

2508

# From the Avahi example code

1888

DBusGMainLoop(set_as_default=True )

2509

DBusGMainLoop(set_as_default=True)

1889

2510

main_loop = gobject.MainLoop()

1890

2511

bus = dbus.SystemBus()

1891

2512

# End of Avahi example code

1892

2513

if use_dbus:

1893

2514

try:

1894

bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",

2515

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

1895

2516

bus, do_not_queue=True)

2517

old_bus_name = (dbus.service.BusName

2518

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

2519

do_not_queue=True))

1896

2520

except dbus.exceptions.NameExistsException as e:

1897

logger.error(unicode(e) + ", disabling D-Bus")

2521

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

1898

2522

use_dbus = False

1899

2523

server_settings["use_dbus"] = False

1900

2524

tcp_server.use_dbus = False

1901

2525

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1902

service = AvahiService(name = server_settings["servicename"],

1903

servicetype = "_mandos._tcp",

1904

protocol = protocol, bus = bus)

2526

service = AvahiServiceToSyslog(name =

2527

server_settings["servicename"],

2528

servicetype = "_mandos._tcp",

2529

protocol = protocol, bus = bus)

1905

2530

if server_settings["interface"]:

1906

2531

service.interface = (if_nametoindex

1907

2532

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

1912

2537

client_class = Client

1913

2538

if use_dbus:

1914

2539

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

1915

def client_config_items(config, section):

1916

special_settings = {

1917

"approved_by_default":

1918

lambda: config.getboolean(section,

1919

"approved_by_default"),

1920

}

1921

for name, value in config.items(section):

2540

2541

client_settings = Client.config_parser(client_config)

2542

old_client_settings = {}

2543

clients_data = {}

2544

2545

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

2546

global wnull

2547

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

2548

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

2549

# mode

2550

if debug or not foreground:

2551

wnull.close()

2552

2553

# Get client data and settings from last running state.

2554

if server_settings["restore"]:

2555

try:

2556

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

2557

clients_data, old_client_settings = (pickle.load

2558

(stored_state))

2559

os.remove(stored_state_path)

2560

except IOError as e:

2561

if e.errno == errno.ENOENT:

2562

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

2563

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

2564

else:

2565

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

2566

exc_info=e)

2567

raise

2568

except EOFError as e:

2569

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

2570

"EOFError:", exc_info=e)

2571

2572

with PGPEngine() as pgp:

2573

for client_name, client in clients_data.iteritems():

2574

# Skip removed clients

2575

if client_name not in client_settings:

2576

continue

2577

2578

# Decide which value to use after restoring saved state.

2579

# We have three different values: Old config file,

2580

# new config file, and saved state.

2581

# New config value takes precedence if it differs from old

2582

# config value, otherwise use saved state.

2583

for name, value in client_settings[client_name].items():

2584

try:

2585

# For each value in new config, check if it

2586

# differs from the old config value (Except for

2587

# the "secret" attribute)

2588

if (name != "secret" and

2589

value != old_client_settings[client_name]

2590

[name]):

2591

client[name] = value

2592

except KeyError:

2593

pass

2594

2595

# Clients who has passed its expire date can still be

2596

# enabled if its last checker was successful. Clients

2597

# whose checker succeeded before we stored its state is

2598

# assumed to have successfully run all checkers during

2599

# downtime.

2600

if client["enabled"]:

2601

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

2602

if not client["last_checked_ok"]:

2603

logger.warning(

2604

"disabling client {0} - Client never "

2605

"performed a successful checker"

2606

.format(client_name))

2607

client["enabled"] = False

2608

elif client["last_checker_status"] != 0:

2609

logger.warning(

2610

"disabling client {0} - Client "

2611

"last checker failed with error code {1}"

2612

.format(client_name,

2613

client["last_checker_status"]))

2614

client["enabled"] = False

2615

else:

2616

client["expires"] = (datetime.datetime

2617

.utcnow()

2618

+ client["timeout"])

2619

logger.debug("Last checker succeeded,"

2620

" keeping {0} enabled"

2621

.format(client_name))

1922

2622

try:

1923

yield (name, special_settings[name]())

1924

except KeyError:

1925

yield (name, value)

1926

1927

tcp_server.clients.update(set(

1928

client_class(name = section,

1929

config= dict(client_config_items(

1930

client_config, section)))

1931

for section in client_config.sections()))

2623

client["secret"] = (

2624

pgp.decrypt(client["encrypted_secret"],

2625

client_settings[client_name]

2626

["secret"]))

2627

except PGPError:

2628

# If decryption fails, we use secret from new settings

2629

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

2630

.format(client_name))

2631

client["secret"] = (

2632

client_settings[client_name]["secret"])

2633

2634

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

2635

for client_name in (set(old_client_settings)

2636

- set(client_settings)):

2637

del clients_data[client_name]

2638

for client_name in (set(client_settings)

2639

- set(old_client_settings)):

2640

clients_data[client_name] = client_settings[client_name]

2641

2642

# Create all client objects

2643

for client_name, client in clients_data.iteritems():

2644

tcp_server.clients[client_name] = client_class(

2645

name = client_name, settings = client,

2646

server_settings = server_settings)

2647

1932

2648

if not tcp_server.clients:

1933

2649

logger.warning("No clients defined")

1934

1935

if not debug:

1936

try:

1937

with pidfile:

1938

pid = os.getpid()

1939

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

1940

del pidfile

1941

except IOError:

1942

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

1943

pidfilename, pid)

1944

except NameError:

1945

# "pidfile" was never created

1946

pass

2650

2651

if not foreground:

2652

if pidfile is not None:

2653

try:

2654

with pidfile:

2655

pid = os.getpid()

2656

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

2657

except IOError:

2658

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

2659

pidfilename, pid)

2660

del pidfile

1947

2661

del pidfilename

1948

1949

signal.signal(signal.SIGINT, signal.SIG_IGN)

1950

2662

1951

2663

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

1952

2664

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

1953

2665

1954

2666

if use_dbus:

1955

class MandosDBusService(dbus.service.Object):

2667

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

2668

"se.bsnet.fukt.Mandos"})

2669

class MandosDBusService(DBusObjectWithProperties):

1956

2670

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

1957

2671

def __init__(self):

1958

2672

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

1959

_interface = "se.bsnet.fukt.Mandos"

2673

_interface = "se.recompile.Mandos"

2674

2675

@dbus_interface_annotations(_interface)

2676

def _foo(self):

2677

return { "org.freedesktop.DBus.Property"

2678

".EmitsChangedSignal":

2679

"false"}

1960

2680

1961

2681

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

1962

2682

def ClientAdded(self, objpath):

1977

2697

def GetAllClients(self):

1978

2698

"D-Bus method"

1979

2699

return dbus.Array(c.dbus_object_path

1980

for c in tcp_server.clients)

2700

for c in

2701

tcp_server.clients.itervalues())

1981

2702

1982

2703

@dbus.service.method(_interface,

1983

2704

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

1985

2706

"D-Bus method"

1986

2707

return dbus.Dictionary(

1987

2708

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

1988

for c in tcp_server.clients),

2709

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

1989

2710

signature="oa{sv}")

1990

2711

1991

2712

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

1992

2713

def RemoveClient(self, object_path):

1993

2714

"D-Bus method"

1994

for c in tcp_server.clients:

2715

for c in tcp_server.clients.itervalues():

1995

2716

if c.dbus_object_path == object_path:

1996

tcp_server.clients.remove(c)

2717

del tcp_server.clients[c.name]

1997

2718

c.remove_from_connection()

1998

2719

# Don't signal anything except ClientRemoved

1999

2720

c.disable(quiet=True)

2010

2731

"Cleanup function; run on exit"

2011

2732

service.cleanup()

2012

2733

2734

multiprocessing.active_children()

2735

wnull.close()

2736

if not (tcp_server.clients or client_settings):

2737

return

2738

2739

# Store client before exiting. Secrets are encrypted with key

2740

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

2741

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

2742

clients = {}

2743

with PGPEngine() as pgp:

2744

for client in tcp_server.clients.itervalues():

2745

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

2746

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

2747

key)

2748

client_dict = {}

2749

2750

# A list of attributes that can not be pickled

2751

# + secret.

2752

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

2753

"checker", "server_settings"))

2754

for name, typ in (inspect.getmembers

2755

(dbus.service.Object)):

2756

exclude.add(name)

2757

2758

client_dict["encrypted_secret"] = (client

2759

.encrypted_secret)

2760

for attr in client.client_structure:

2761

if attr not in exclude:

2762

client_dict[attr] = getattr(client, attr)

2763

2764

clients[client.name] = client_dict

2765

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

2766

2767

try:

2768

with (tempfile.NamedTemporaryFile

2769

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

2770

dir=os.path.dirname(stored_state_path),

2771

delete=False)) as stored_state:

2772

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

2773

tempname=stored_state.name

2774

os.rename(tempname, stored_state_path)

2775

except (IOError, OSError) as e:

2776

if not debug:

2777

try:

2778

os.remove(tempname)

2779

except NameError:

2780

pass

2781

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

2782

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

2783

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

2784

else:

2785

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

2786

exc_info=e)

2787

raise e

2788

2789

# Delete all clients, and settings from config

2013

2790

while tcp_server.clients:

2014

client = tcp_server.clients.pop()

2791

name, client = tcp_server.clients.popitem()

2015

2792

if use_dbus:

2016

2793

client.remove_from_connection()

2017

client.disable_hook = None

2018

2794

# Don't signal anything except ClientRemoved

2019

2795

client.disable(quiet=True)

2020

2796

if use_dbus:

2021

2797

# Emit D-Bus signal

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2798

mandos_dbus_service.ClientRemoved(client

2799

.dbus_object_path,

2023

2800

client.name)

2801

client_settings.clear()

2024

2802

2025

2803

atexit.register(cleanup)

2026

2804

2027

for client in tcp_server.clients:

2805

for client in tcp_server.clients.itervalues():

2028

2806

if use_dbus:

2029

2807

# Emit D-Bus signal

2030

2808

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2031

client.enable()

2809

# Need to initiate checking of clients

2810

if client.enabled:

2811

client.init_checker()

2032

2812

2033

2813

tcp_server.enable()

2034

2814

tcp_server.server_activate()

2037

2817

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

2038

2818

if use_ipv6:

2039

2819

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

2040

" flowinfo %d, scope_id %d"

2041

% tcp_server.socket.getsockname())

2820

" flowinfo %d, scope_id %d",

2821

*tcp_server.socket.getsockname())

2042

2822

else: # IPv4

2043

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

2044

% tcp_server.socket.getsockname())

2823

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

2824

*tcp_server.socket.getsockname())

2045

2825

2046

2826

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

2047

2827

2050

2830

try:

2051

2831

service.activate()

2052

2832

except dbus.exceptions.DBusException as error:

2053

logger.critical("DBusException: %s", error)

2833

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

2054

2834

cleanup()

2055

2835

sys.exit(1)

2056

2836

# End of Avahi example code

2063

2843

logger.debug("Starting main loop")

2064

2844

main_loop.run()

2065

2845

except AvahiError as error:

2066

logger.critical("AvahiError: %s", error)

2846

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

2067

2847

cleanup()

2068

2848

sys.exit(1)

2069

2849

except KeyboardInterrupt: