/mandos/release : revision 237.7.218

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 = "1.3.1"

86

87

#logger = logging.getLogger('mandos')

88

logger = logging.Logger('mandos')

89

syslogger = (logging.handlers.SysLogHandler

90

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

91

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)

91

version = "1.6.4"

92

stored_state_file = "clients.pickle"

93

94

logger = logging.getLogger()

95

syslogger = None

96

97

try:

98

if_nametoindex = (ctypes.cdll.LoadLibrary

99

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

100

.if_nametoindex)

101

except (OSError, AttributeError):

102

def if_nametoindex(interface):

103

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

104

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

105

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

106

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

107

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

108

interface))

109

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

110

ifreq[16:20])[0]

111

return interface_index

112

113

114

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

115

"""init logger and add loglevel"""

116

117

syslogger = (logging.handlers.SysLogHandler

118

(facility =

119

logging.handlers.SysLogHandler.LOG_DAEMON,

120

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

121

syslogger.setFormatter(logging.Formatter

122

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

123

' %(message)s'))

124

logger.addHandler(syslogger)

125

126

if debug:

127

console = logging.StreamHandler()

128

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

129

' [%(process)d]:'

130

' %(levelname)s:'

131

' %(message)s'))

132

logger.addHandler(console)

133

logger.setLevel(level)

134

135

136

class PGPError(Exception):

137

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

138

pass

139

140

141

class PGPEngine(object):

142

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

143

def __init__(self):

144

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

145

self.gnupgargs = ['--batch',

146

'--home', self.tempdir,

147

'--force-mdc',

148

'--quiet',

149

'--no-use-agent']

150

151

def __enter__(self):

152

return self

153

154

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

155

self._cleanup()

156

return False

157

158

def __del__(self):

159

self._cleanup()

160

161

def _cleanup(self):

162

if self.tempdir is not None:

163

# Delete contents of tempdir

164

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

165

topdown = False):

166

for filename in files:

167

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

168

for dirname in dirs:

169

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

170

# Remove tempdir

171

os.rmdir(self.tempdir)

172

self.tempdir = None

173

174

def password_encode(self, password):

175

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

176

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

177

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

178

if len(encoded) > 2048:

179

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

180

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

181

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

182

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

183

return encoded

184

185

def encrypt(self, data, password):

186

passphrase = self.password_encode(password)

187

with tempfile.NamedTemporaryFile(dir=self.tempdir

188

) as passfile:

189

passfile.write(passphrase)

190

passfile.flush()

191

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

192

'--passphrase-file',

193

passfile.name]

194

+ self.gnupgargs,

195

stdin = subprocess.PIPE,

196

stdout = subprocess.PIPE,

197

stderr = subprocess.PIPE)

198

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

199

if proc.returncode != 0:

200

raise PGPError(err)

201

return ciphertext

202

203

def decrypt(self, data, password):

204

passphrase = self.password_encode(password)

205

with tempfile.NamedTemporaryFile(dir = self.tempdir

206

) as passfile:

207

passfile.write(passphrase)

208

passfile.flush()

209

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

210

'--passphrase-file',

211

passfile.name]

212

+ self.gnupgargs,

213

stdin = subprocess.PIPE,

214

stdout = subprocess.PIPE,

215

stderr = subprocess.PIPE)

216

decrypted_plaintext, err = proc.communicate(input

217

= data)

218

if proc.returncode != 0:

219

raise PGPError(err)

220

return decrypted_plaintext

221

102

222

103

223

class AvahiError(Exception):

104

224

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

122

242

Used to optionally bind to the specified interface.

123

243

name: string; Example: 'Mandos'

124

244

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

125

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

245

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

126

246

port: integer; what port to announce

127

247

TXT: list of strings; TXT record for the service

128

248

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

134

254

server: D-Bus Server

135

255

bus: dbus.SystemBus()

136

256

"""

257

137

258

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

138

259

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

139

260

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

152

273

self.server = None

153

274

self.bus = bus

154

275

self.entry_group_state_changed_match = None

276

155

277

def rename(self):

156

278

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

157

279

if self.rename_count >= self.max_renames:

159

281

" after %i retries, exiting.",

160

282

self.rename_count)

161

283

raise AvahiServiceError("Too many renames")

162

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

284

self.name = unicode(self.server

285

.GetAlternativeServiceName(self.name))

163

286

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

164

287

self.name)

165

syslogger.setFormatter(logging.Formatter

166

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

167

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

168

% self.name))

169

288

self.remove()

170

289

try:

171

290

self.add()

172

291

except dbus.exceptions.DBusException as error:

173

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

292

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

174

293

self.cleanup()

175

294

os._exit(1)

176

295

self.rename_count += 1

296

177

297

def remove(self):

178

298

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

179

299

if self.entry_group_state_changed_match is not None:

181

301

self.entry_group_state_changed_match = None

182

302

if self.group is not None:

183

303

self.group.Reset()

304

184

305

def add(self):

185

306

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

186

307

self.remove()

191

312

avahi.DBUS_INTERFACE_ENTRY_GROUP)

192

313

self.entry_group_state_changed_match = (

193

314

self.group.connect_to_signal(

194

'StateChanged', self .entry_group_state_changed))

315

'StateChanged', self.entry_group_state_changed))

195

316

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

196

317

self.name, self.type)

197

318

self.group.AddService(

203

324

dbus.UInt16(self.port),

204

325

avahi.string_array_to_txt_array(self.TXT))

205

326

self.group.Commit()

327

206

328

def entry_group_state_changed(self, state, error):

207

329

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

208

330

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

215

337

elif state == avahi.ENTRY_GROUP_FAILURE:

216

338

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

217

339

unicode(error))

218

raise AvahiGroupError("State changed: %s"

219

% unicode(error))

340

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

341

.format(error))

342

220

343

def cleanup(self):

221

344

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

222

345

if self.group is not None:

223

346

try:

224

347

self.group.Free()

225

348

except (dbus.exceptions.UnknownMethodException,

226

dbus.exceptions.DBusException) as e:

349

dbus.exceptions.DBusException):

227

350

pass

228

351

self.group = None

229

352

self.remove()

353

230

354

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

231

355

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

232

356

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

251

375

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

252

376

else:

253

377

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

378

254

379

def activate(self):

255

380

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

256

381

if self.server is None:

264

389

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

265

390

266

391

392

class AvahiServiceToSyslog(AvahiService):

393

def rename(self):

394

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

395

ret = AvahiService.rename(self)

396

syslogger.setFormatter(logging.Formatter

397

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

398

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

399

.format(self.name)))

400

return ret

401

402

403

def timedelta_to_milliseconds(td):

404

"Convert a datetime.timedelta() to milliseconds"

405

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

406

+ (td.seconds * 1000)

407

+ (td.microseconds // 1000))

408

409

267

410

class Client(object):

268

411

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

269

412

270

413

Attributes:

271

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

414

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

272

415

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

273

416

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

274

417

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

281

424

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

282

425

checker_initiator_tag: a gobject event source tag, or None

283

426

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

427

client_structure: Object describing what attributes a client has

428

and is used for storing the client at exit

284

429

current_checker_command: string; current running checker_command

285

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

286

430

disable_initiator_tag: a gobject event source tag, or None

287

431

enabled: bool()

288

432

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

291

435

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

292

436

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

293

437

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

294

last_enabled: datetime.datetime(); (UTC)

438

last_checker_status: integer between 0 and 255 reflecting exit

439

status of last checker. -1 reflects crashed

440

checker, -2 means no checker completed yet.

441

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

295

442

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

296

443

D-Bus identifiers

297

444

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

298

445

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

299

446

until this client is disabled

300

extended_timeout: extra long timeout when password has been sent

447

extended_timeout: extra long timeout when secret has been sent

301

448

runtime_expansions: Allowed attributes for runtime expansion.

302

449

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

303

450

disabled, or None

451

server_settings: The server_settings dict from main()

304

452

"""

305

453

306

454

runtime_expansions = ("approval_delay", "approval_duration",

307

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

308

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

455

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

456

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

457

"last_approval_request", "last_checked_ok",

309

458

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

310

311

@staticmethod

312

def _timedelta_to_milliseconds(td):

313

"Convert a datetime.timedelta() to milliseconds"

314

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

315

+ (td.seconds * 1000)

316

+ (td.microseconds // 1000))

459

client_defaults = { "timeout": "PT5M",

460

"extended_timeout": "PT15M",

461

"interval": "PT2M",

462

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

463

"host": "",

464

"approval_delay": "PT0S",

465

"approval_duration": "PT1S",

466

"approved_by_default": "True",

467

"enabled": "True",

468

}

317

469

318

470

def timeout_milliseconds(self):

319

471

"Return the 'timeout' attribute in milliseconds"

320

return self._timedelta_to_milliseconds(self.timeout)

321

472

return timedelta_to_milliseconds(self.timeout)

473

322

474

def extended_timeout_milliseconds(self):

323

475

"Return the 'extended_timeout' attribute in milliseconds"

324

return self._timedelta_to_milliseconds(self.extended_timeout)

476

return timedelta_to_milliseconds(self.extended_timeout)

325

477

326

478

def interval_milliseconds(self):

327

479

"Return the 'interval' attribute in milliseconds"

328

return self._timedelta_to_milliseconds(self.interval)

329

480

return timedelta_to_milliseconds(self.interval)

481

330

482

def approval_delay_milliseconds(self):

331

return self._timedelta_to_milliseconds(self.approval_delay)

332

333

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

334

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

335

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

336

attribute."""

483

return timedelta_to_milliseconds(self.approval_delay)

484

485

@staticmethod

486

def config_parser(config):

487

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

488

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

489

with exceptions for any special settings as defined above.

490

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

491

value given the same arguments.

492

"""

493

settings = {}

494

for client_name in config.sections():

495

section = dict(config.items(client_name))

496

client = settings[client_name] = {}

497

498

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

499

# Reformat values from string types to Python types

500

client["approved_by_default"] = config.getboolean(

501

client_name, "approved_by_default")

502

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

503

"enabled")

504

505

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

506

.replace(" ", ""))

507

if "secret" in section:

508

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

509

elif "secfile" in section:

510

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

511

(section["secfile"])),

512

"rb") as secfile:

513

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

514

else:

515

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

516

.format(section))

517

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

518

client["extended_timeout"] = string_to_delta(

519

section["extended_timeout"])

520

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

521

client["approval_delay"] = string_to_delta(

522

section["approval_delay"])

523

client["approval_duration"] = string_to_delta(

524

section["approval_duration"])

525

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

526

client["last_approval_request"] = None

527

client["last_checked_ok"] = None

528

client["last_checker_status"] = -2

529

530

return settings

531

532

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

337

533

self.name = name

338

if config is None:

339

config = {}

534

if server_settings is None:

535

server_settings = {}

536

self.server_settings = server_settings

537

# adding all client settings

538

for setting, value in settings.iteritems():

539

setattr(self, setting, value)

540

541

if self.enabled:

542

if not hasattr(self, "last_enabled"):

543

self.last_enabled = datetime.datetime.utcnow()

544

if not hasattr(self, "expires"):

545

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

546

+ self.timeout)

547

else:

548

self.last_enabled = None

549

self.expires = None

550

340

551

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

341

552

# Uppercase and remove spaces from fingerprint for later

342

553

# comparison purposes with return value from the fingerprint()

343

554

# function

344

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

345

.replace(" ", ""))

346

555

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

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

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

356

% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

556

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

557

datetime.datetime.utcnow())

558

559

# attributes specific for this server instance

367

560

self.checker = None

368

561

self.checker_initiator_tag = None

369

562

self.disable_initiator_tag = None

370

self.expires = None

371

563

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

373

564

self.current_checker_command = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

565

self.approved = None

378

566

self.approvals_pending = 0

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

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

567

self.changedstate = (multiprocessing_manager

568

.Condition(multiprocessing_manager

569

.Lock()))

570

self.client_structure = [attr for attr in

571

self.__dict__.iterkeys()

572

if not attr.startswith("_")]

573

self.client_structure.append("client_structure")

574

575

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

576

lambda obj:

577

isinstance(obj,

578

property)):

579

if not name.startswith("_"):

580

self.client_structure.append(name)

384

581

582

# Send notice to process children that client state has changed

385

583

def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

584

with self.changedstate:

585

self.changedstate.notify_all()

586

390

587

def enable(self):

391

588

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

392

589

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

393

590

# Already enabled

394

591

return

395

self.send_changedstate()

592

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

593

self.enabled = True

396

594

self.last_enabled = datetime.datetime.utcnow()

595

self.init_checker()

596

self.send_changedstate()

597

598

def disable(self, quiet=True):

599

"""Disable this client."""

600

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

601

return False

602

if not quiet:

603

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

604

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

605

gobject.source_remove(self.disable_initiator_tag)

606

self.disable_initiator_tag = None

607

self.expires = None

608

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

609

gobject.source_remove(self.checker_initiator_tag)

610

self.checker_initiator_tag = None

611

self.stop_checker()

612

self.enabled = False

613

if not quiet:

614

self.send_changedstate()

615

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

616

return False

617

618

def __del__(self):

619

self.disable()

620

621

def init_checker(self):

397

622

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

398

623

# and every interval from then on.

624

if self.checker_initiator_tag is not None:

625

gobject.source_remove(self.checker_initiator_tag)

399

626

self.checker_initiator_tag = (gobject.timeout_add

400

627

(self.interval_milliseconds(),

401

628

self.start_checker))

402

629

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

403

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

630

if self.disable_initiator_tag is not None:

631

gobject.source_remove(self.disable_initiator_tag)

404

632

self.disable_initiator_tag = (gobject.timeout_add

405

633

(self.timeout_milliseconds(),

406

634

self.disable))

407

self.enabled = True

408

635

# Also start a new checker *right now*.

409

636

self.start_checker()

410

637

411

def disable(self, quiet=True):

412

"""Disable this client."""

413

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

414

return False

415

if not quiet:

416

self.send_changedstate()

417

if not quiet:

418

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

419

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

420

gobject.source_remove(self.disable_initiator_tag)

421

self.disable_initiator_tag = None

422

self.expires = None

423

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

424

gobject.source_remove(self.checker_initiator_tag)

425

self.checker_initiator_tag = None

426

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

self.enabled = False

430

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

431

return False

432

433

def __del__(self):

434

self.disable_hook = None

435

self.disable()

436

437

638

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

438

639

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

439

640

self.checker_callback_tag = None

440

641

self.checker = None

441

642

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

643

self.last_checker_status = os.WEXITSTATUS(condition)

644

if self.last_checker_status == 0:

444

645

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

445

646

vars(self))

446

647

self.checked_ok()

448

649

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

449

650

vars(self))

450

651

else:

652

self.last_checker_status = -1

451

653

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

452

654

vars(self))

453

655

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

656

def checked_ok(self):

657

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

658

self.last_checked_ok = datetime.datetime.utcnow()

659

self.last_checker_status = 0

660

self.bump_timeout()

661

662

def bump_timeout(self, timeout=None):

663

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

460

664

if timeout is None:

461

665

timeout = self.timeout

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(self._timedelta_to_milliseconds(timeout),

467

self.disable))

666

if self.disable_initiator_tag is not None:

667

gobject.source_remove(self.disable_initiator_tag)

668

self.disable_initiator_tag = None

669

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

670

self.disable_initiator_tag = (gobject.timeout_add

671

(timedelta_to_milliseconds

672

(timeout), self.disable))

673

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

468

674

469

675

def need_approval(self):

470

676

self.last_approval_request = datetime.datetime.utcnow()

475

681

If a checker already exists, leave it running and do

476

682

nothing."""

477

683

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

478

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

479

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

480

# client would inevitably timeout, since no checker would get

481

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

684

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

685

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

686

# would inevitably timeout, since no checker would get a

687

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

482

688

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

483

689

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

484

690

# should be.

486

692

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

487

693

try:

488

694

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

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

695

except AttributeError:

696

pass

697

except OSError as error:

698

if error.errno != errno.ECHILD:

699

raise

493

700

else:

494

701

if pid:

495

702

logger.warning("Checker was a zombie")

498

705

self.current_checker_command)

499

706

# Start a new checker if needed

500

707

if self.checker is None:

708

# Escape attributes for the shell

709

escaped_attrs = dict(

710

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

711

for attr in

712

self.runtime_expansions)

501

713

try:

502

# In case checker_command has exactly one % operator

503

command = self.checker_command % self.host

504

except TypeError:

505

# Escape attributes for the shell

506

escaped_attrs = dict(

507

(attr,

508

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

509

errors=

510

'replace')))

511

for attr in

512

self.runtime_expansions)

513

514

try:

515

command = self.checker_command % escaped_attrs

516

except TypeError as error:

517

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

518

' %s', self.checker_command, error)

519

return True # Try again later

714

command = self.checker_command % escaped_attrs

715

except TypeError as error:

716

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

717

self.checker_command, exc_info=error)

718

return True # Try again later

520

719

self.current_checker_command = command

521

720

try:

522

721

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

525

724

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

526

725

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

527

726

# always replaced by /dev/null.)

727

# The exception is when not debugging but nevertheless

728

# running in the foreground; use the previously

729

# created wnull.

730

popen_args = {}

731

if (not self.server_settings["debug"]

732

and self.server_settings["foreground"]):

733

popen_args.update({"stdout": wnull,

734

"stderr": wnull })

528

735

self.checker = subprocess.Popen(command,

529

736

close_fds=True,

530

shell=True, cwd="/")

531

self.checker_callback_tag = (gobject.child_watch_add

532

(self.checker.pid,

533

self.checker_callback,

534

data=command))

535

# The checker may have completed before the gobject

536

# watch was added. Check for this.

737

shell=True, cwd="/",

738

**popen_args)

739

except OSError as error:

740

logger.error("Failed to start subprocess",

741

exc_info=error)

742

return True

743

self.checker_callback_tag = (gobject.child_watch_add

744

(self.checker.pid,

745

self.checker_callback,

746

data=command))

747

# The checker may have completed before the gobject

748

# watch was added. Check for this.

749

try:

537

750

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

538

if pid:

539

gobject.source_remove(self.checker_callback_tag)

540

self.checker_callback(pid, status, command)

541

751

except OSError as error:

542

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

543

error)

752

if error.errno == errno.ECHILD:

753

# This should never happen

754

logger.error("Child process vanished",

755

exc_info=error)

756

return True

757

raise

758

if pid:

759

gobject.source_remove(self.checker_callback_tag)

760

self.checker_callback(pid, status, command)

544

761

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

545

762

return True

546

763

553

770

return

554

771

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

555

772

try:

556

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

773

self.checker.terminate()

557

774

#time.sleep(0.5)

558

775

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

559

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

776

# self.checker.kill()

560

777

except OSError as error:

561

778

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

562

779

raise

563

780

self.checker = None

564

781

782

565

783

def dbus_service_property(dbus_interface, signature="v",

566

784

access="readwrite", byte_arrays=False):

567

785

"""Decorators for marking methods of a DBusObjectWithProperties to

578

796

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

579

797

if byte_arrays and signature != "ay":

580

798

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

581

" signature %r" % signature)

799

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

582

800

def decorator(func):

583

801

func._dbus_is_property = True

584

802

func._dbus_interface = dbus_interface

592

810

return decorator

593

811

594

812

813

def dbus_interface_annotations(dbus_interface):

814

"""Decorator for marking functions returning interface annotations

815

816

Usage:

817

818

@dbus_interface_annotations("org.example.Interface")

819

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

820

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

821

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

822

"false"}

823

"""

824

def decorator(func):

825

func._dbus_is_interface = True

826

func._dbus_interface = dbus_interface

827

func._dbus_name = dbus_interface

828

return func

829

return decorator

830

831

832

def dbus_annotations(annotations):

833

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

834

Usage:

835

836

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

837

access="r")

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

841

def Property_dbus_property(self):

842

return dbus.Boolean(False)

843

"""

844

def decorator(func):

845

func._dbus_annotations = annotations

846

return func

847

return decorator

848

849

595

850

class DBusPropertyException(dbus.exceptions.DBusException):

596

851

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

597

852

"""

613

868

614

869

class DBusObjectWithProperties(dbus.service.Object):

615

870

"""A D-Bus object with properties.

616

871

617

872

Classes inheriting from this can use the dbus_service_property

618

873

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

619

874

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

620

875

"""

621

876

622

877

@staticmethod

623

def _is_dbus_property(obj):

624

return getattr(obj, "_dbus_is_property", False)

878

def _is_dbus_thing(thing):

879

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

880

881

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

882

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

883

"""

884

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

885

False)

625

886

626

def _get_all_dbus_properties(self):

887

def _get_all_dbus_things(self, thing):

627

888

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

628

889

"""

629

return ((prop._dbus_name, prop)

630

for name, prop in

631

inspect.getmembers(self, self._is_dbus_property))

890

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

891

name),

892

athing.__get__(self))

893

for cls in self.__class__.__mro__

894

for name, athing in

895

inspect.getmembers(cls,

896

self._is_dbus_thing(thing)))

632

897

633

898

def _get_dbus_property(self, interface_name, property_name):

634

899

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

635

900

property with the specified name and interface.

636

901

"""

637

for name in (property_name,

638

property_name + "_dbus_property"):

639

prop = getattr(self, name, None)

640

if (prop is None

641

or not self._is_dbus_property(prop)

642

or prop._dbus_name != property_name

643

or (interface_name and prop._dbus_interface

644

and interface_name != prop._dbus_interface)):

645

continue

646

return prop

902

for cls in self.__class__.__mro__:

903

for name, value in (inspect.getmembers

904

(cls,

905

self._is_dbus_thing("property"))):

906

if (value._dbus_name == property_name

907

and value._dbus_interface == interface_name):

908

return value.__get__(self)

909

647

910

# No such property

648

911

raise DBusPropertyNotFound(self.dbus_object_path + ":"

649

912

+ interface_name + "."

673

936

# The byte_arrays option is not supported yet on

674

937

# signatures other than "ay".

675

938

if prop._dbus_signature != "ay":

676

raise ValueError

677

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

678

for byte in value))

939

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

940

"'ay' signature {0!r}"

941

.format(prop._dbus_signature))

942

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

943

for byte in value))

679

944

prop(value)

680

945

681

946

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

683

948

def GetAll(self, interface_name):

684

949

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

685

950

standard.

686

951

687

952

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

688

953

"""

689

all = {}

690

for name, prop in self._get_all_dbus_properties():

954

properties = {}

955

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

691

956

if (interface_name

692

957

and interface_name != prop._dbus_interface):

693

958

# Interface non-empty but did not match

697

962

continue

698

963

value = prop()

699

964

if not hasattr(value, "variant_level"):

700

all[name] = value

965

properties[name] = value

701

966

continue

702

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

703

value.variant_level+1)

704

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

967

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

968

value.variant_level+1)

969

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

705

970

706

971

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

707

972

out_signature="s",

708

973

path_keyword='object_path',

709

974

connection_keyword='connection')

710

975

def Introspect(self, object_path, connection):

711

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

976

"""Overloading of standard D-Bus method.

977

978

Inserts property tags and interface annotation tags.

712

979

"""

713

980

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

714

981

connection)

721

988

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

722

989

return e

723

990

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

991

# Add property tags

724

992

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

725

993

for name, prop

726

in self._get_all_dbus_properties()

994

in self._get_all_dbus_things("property")

727

995

if prop._dbus_interface

728

996

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

729

997

if_tag.appendChild(tag)

998

# Add annotation tags

999

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

1000

for tag in if_tag.getElementsByTagName(typ):

1001

annots = dict()

1002

for name, prop in (self.

1003

_get_all_dbus_things(typ)):

1004

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

1005

and prop._dbus_interface

1006

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

1007

annots.update(getattr

1008

(prop,

1009

"_dbus_annotations",

1010

{}))

1011

for name, value in annots.iteritems():

1012

ann_tag = document.createElement(

1013

"annotation")

1014

ann_tag.setAttribute("name", name)

1015

ann_tag.setAttribute("value", value)

1016

tag.appendChild(ann_tag)

1017

# Add interface annotation tags

1018

for annotation, value in dict(

1019

itertools.chain.from_iterable(

1020

annotations().iteritems()

1021

for name, annotations in

1022

self._get_all_dbus_things("interface")

1023

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

1024

)).iteritems():

1025

ann_tag = document.createElement("annotation")

1026

ann_tag.setAttribute("name", annotation)

1027

ann_tag.setAttribute("value", value)

1028

if_tag.appendChild(ann_tag)

730

1029

# Add the names to the return values for the

731

1030

# "org.freedesktop.DBus.Properties" methods

732

1031

if (if_tag.getAttribute("name")

747

1046

except (AttributeError, xml.dom.DOMException,

748

1047

xml.parsers.expat.ExpatError) as error:

749

1048

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

750

error)

1049

exc_info=error)

751

1050

return xmlstring

752

1051

753

1052

1053

def datetime_to_dbus(dt, variant_level=0):

1054

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

1055

if dt is None:

1056

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

1057

return dbus.String(dt.isoformat(),

1058

variant_level=variant_level)

1059

1060

1061

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1062

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

1063

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

1064

interface names according to the "alt_interface_names" mapping.

1065

Usage:

1066

1067

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

1068

"net.example.AlternateInterface"})

1069

class SampleDBusObject(dbus.service.Object):

1070

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

1071

def SampleDBusMethod():

1072

pass

1073

1074

The above "SampleDBusMethod" on "SampleDBusObject" will be

1075

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

1076

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

1077

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

1078

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

1079

1080

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

1081

(from DBusObjectWithProperties) and interfaces (from the

1082

dbus_interface_annotations decorator).

1083

"""

1084

def wrapper(cls):

1085

for orig_interface_name, alt_interface_name in (

1086

alt_interface_names.iteritems()):

1087

attr = {}

1088

interface_names = set()

1089

# Go though all attributes of the class

1090

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

1091

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

1092

# with the wrong interface name

1093

if (not hasattr(attribute, "_dbus_interface")

1094

or not attribute._dbus_interface

1095

.startswith(orig_interface_name)):

1096

continue

1097

# Create an alternate D-Bus interface name based on

1098

# the current name

1099

alt_interface = (attribute._dbus_interface

1100

.replace(orig_interface_name,

1101

alt_interface_name))

1102

interface_names.add(alt_interface)

1103

# Is this a D-Bus signal?

1104

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

1105

# Extract the original non-method undecorated

1106

# function by black magic

1107

nonmethod_func = (dict(

1108

zip(attribute.func_code.co_freevars,

1109

attribute.__closure__))["func"]

1110

.cell_contents)

1111

# Create a new, but exactly alike, function

1112

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

1113

# with the alternate D-Bus interface name

1114

new_function = (dbus.service.signal

1115

(alt_interface,

1116

attribute._dbus_signature)

1117

(types.FunctionType(

1118

nonmethod_func.func_code,

1119

nonmethod_func.func_globals,

1120

nonmethod_func.func_name,

1121

nonmethod_func.func_defaults,

1122

nonmethod_func.func_closure)))

1123

# Copy annotations, if any

1124

try:

1125

new_function._dbus_annotations = (

1126

dict(attribute._dbus_annotations))

1127

except AttributeError:

1128

pass

1129

# Define a creator of a function to call both the

1130

# original and alternate functions, so both the

1131

# original and alternate signals gets sent when

1132

# the function is called

1133

def fixscope(func1, func2):

1134

"""This function is a scope container to pass

1135

func1 and func2 to the "call_both" function

1136

outside of its arguments"""

1137

def call_both(*args, **kwargs):

1138

"""This function will emit two D-Bus

1139

signals by calling func1 and func2"""

1140

func1(*args, **kwargs)

1141

func2(*args, **kwargs)

1142

return call_both

1143

# Create the "call_both" function and add it to

1144

# the class

1145

attr[attrname] = fixscope(attribute, new_function)

1146

# Is this a D-Bus method?

1147

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

1148

# Create a new, but exactly alike, function

1149

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

1150

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

1151

# to the class.

1152

attr[attrname] = (dbus.service.method

1153

(alt_interface,

1154

attribute._dbus_in_signature,

1155

attribute._dbus_out_signature)

1156

(types.FunctionType

1157

(attribute.func_code,

1158

attribute.func_globals,

1159

attribute.func_name,

1160

attribute.func_defaults,

1161

attribute.func_closure)))

1162

# Copy annotations, if any

1163

try:

1164

attr[attrname]._dbus_annotations = (

1165

dict(attribute._dbus_annotations))

1166

except AttributeError:

1167

pass

1168

# Is this a D-Bus property?

1169

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

1170

# Create a new, but exactly alike, function

1171

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

1172

# property with the alternate D-Bus interface

1173

# name. Add it to the class.

1174

attr[attrname] = (dbus_service_property

1175

(alt_interface,

1176

attribute._dbus_signature,

1177

attribute._dbus_access,

1178

attribute

1179

._dbus_get_args_options

1180

["byte_arrays"])

1181

(types.FunctionType

1182

(attribute.func_code,

1183

attribute.func_globals,

1184

attribute.func_name,

1185

attribute.func_defaults,

1186

attribute.func_closure)))

1187

# Copy annotations, if any

1188

try:

1189

attr[attrname]._dbus_annotations = (

1190

dict(attribute._dbus_annotations))

1191

except AttributeError:

1192

pass

1193

# Is this a D-Bus interface?

1194

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

1195

# Create a new, but exactly alike, function

1196

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

1197

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

1198

# to the class.

1199

attr[attrname] = (dbus_interface_annotations

1200

(alt_interface)

1201

(types.FunctionType

1202

(attribute.func_code,

1203

attribute.func_globals,

1204

attribute.func_name,

1205

attribute.func_defaults,

1206

attribute.func_closure)))

1207

if deprecate:

1208

# Deprecate all alternate interfaces

1209

iname="_AlternateDBusNames_interface_annotation{0}"

1210

for interface_name in interface_names:

1211

@dbus_interface_annotations(interface_name)

1212

def func(self):

1213

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

1214

"true" }

1215

# Find an unused name

1216

for aname in (iname.format(i)

1217

for i in itertools.count()):

1218

if aname not in attr:

1219

attr[aname] = func

1220

break

1221

if interface_names:

1222

# Replace the class with a new subclass of it with

1223

# methods, signals, etc. as created above.

1224

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

1225

(cls,), attr)

1226

return cls

1227

return wrapper

1228

1229

1230

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

1231

"se.bsnet.fukt.Mandos"})

754

1232

class ClientDBus(Client, DBusObjectWithProperties):

755

1233

"""A Client class using D-Bus

756

1234

765

1243

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

766

1244

767

1245

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

768

self._approvals_pending = 0

769

1246

self.bus = bus

770

1247

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

771

1248

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

777

1254

("/clients/" + client_object_name))

778

1255

DBusObjectWithProperties.__init__(self, self.bus,

779

1256

self.dbus_object_path)

780

def _set_expires(self, value):

781

old_value = getattr(self, "_expires", None)

782

self._expires = value

783

if hasattr(self, "dbus_object_path") and old_value != value:

784

dbus_time = (self._datetime_to_dbus(self._expires,

785

variant_level=1))

786

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

787

dbus_time)

788

expires = property(lambda self: self._expires, _set_expires)

789

del _set_expires

790

791

def _get_approvals_pending(self):

792

return self._approvals_pending

793

def _set_approvals_pending(self, value):

794

old_value = self._approvals_pending

795

self._approvals_pending = value

796

bval = bool(value)

797

if (hasattr(self, "dbus_object_path")

798

and bval is not bool(old_value)):

799

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

800

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

801

dbus_bool)

802

803

approvals_pending = property(_get_approvals_pending,

804

_set_approvals_pending)

805

del _get_approvals_pending, _set_approvals_pending

806

807

@staticmethod

808

def _datetime_to_dbus(dt, variant_level=0):

809

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

810

if dt is None:

811

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

812

return dbus.String(dt.isoformat(),

813

variant_level=variant_level)

814

815

def enable(self):

816

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

817

r = Client.enable(self)

818

if oldstate != self.enabled:

819

# Emit D-Bus signals

820

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

821

dbus.Boolean(True, variant_level=1))

822

self.PropertyChanged(

823

dbus.String("LastEnabled"),

824

self._datetime_to_dbus(self.last_enabled,

825

variant_level=1))

826

return r

827

828

def disable(self, quiet = False):

829

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

830

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

831

if not quiet and oldstate != self.enabled:

832

# Emit D-Bus signal

833

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

834

dbus.Boolean(False, variant_level=1))

835

return r

1257

1258

def notifychangeproperty(transform_func,

1259

dbus_name, type_func=lambda x: x,

1260

variant_level=1):

1261

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

1262

its changes to DBus.

1263

1264

transform_fun: Function that takes a value and a variant_level

1265

and transforms it to a D-Bus type.

1266

dbus_name: D-Bus name of the variable

1267

type_func: Function that transform the value before sending it

1268

to the D-Bus. Default: no transform

1269

variant_level: D-Bus variant level. Default: 1

1270

"""

1271

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

1272

def setter(self, value):

1273

if hasattr(self, "dbus_object_path"):

1274

if (not hasattr(self, attrname) or

1275

type_func(getattr(self, attrname, None))

1276

!= type_func(value)):

1277

dbus_value = transform_func(type_func(value),

1278

variant_level

1279

=variant_level)

1280

self.PropertyChanged(dbus.String(dbus_name),

1281

dbus_value)

1282

setattr(self, attrname, value)

1283

1284

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

1285

1286

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1287

approvals_pending = notifychangeproperty(dbus.Boolean,

1288

"ApprovalPending",

1289

type_func = bool)

1290

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

1291

last_enabled = notifychangeproperty(datetime_to_dbus,

1292

"LastEnabled")

1293

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

1294

type_func = lambda checker:

1295

checker is not None)

1296

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1297

"LastCheckedOK")

1298

last_checker_status = notifychangeproperty(dbus.Int16,

1299

"LastCheckerStatus")

1300

last_approval_request = notifychangeproperty(

1301

datetime_to_dbus, "LastApprovalRequest")

1302

approved_by_default = notifychangeproperty(dbus.Boolean,

1303

"ApprovedByDefault")

1304

approval_delay = notifychangeproperty(dbus.UInt64,

1305

"ApprovalDelay",

1306

type_func =

1307

timedelta_to_milliseconds)

1308

approval_duration = notifychangeproperty(

1309

dbus.UInt64, "ApprovalDuration",

1310

type_func = timedelta_to_milliseconds)

1311

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

1312

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

1313

type_func =

1314

timedelta_to_milliseconds)

1315

extended_timeout = notifychangeproperty(

1316

dbus.UInt64, "ExtendedTimeout",

1317

type_func = timedelta_to_milliseconds)

1318

interval = notifychangeproperty(dbus.UInt64,

1319

"Interval",

1320

type_func =

1321

timedelta_to_milliseconds)

1322

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

1323

1324

del notifychangeproperty

836

1325

837

1326

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

838

1327

try:

847

1336

*args, **kwargs):

848

1337

self.checker_callback_tag = None

849

1338

self.checker = None

850

# Emit D-Bus signal

851

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

852

dbus.Boolean(False, variant_level=1))

853

1339

if os.WIFEXITED(condition):

854

1340

exitstatus = os.WEXITSTATUS(condition)

855

1341

# Emit D-Bus signal

865

1351

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

866

1352

*args, **kwargs)

867

1353

868

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

869

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

870

# Emit D-Bus signal

871

self.PropertyChanged(

872

dbus.String("LastCheckedOK"),

873

(self._datetime_to_dbus(self.last_checked_ok,

874

variant_level=1)))

875

876

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

877

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

878

# Emit D-Bus signal

879

self.PropertyChanged(

880

dbus.String("LastApprovalRequest"),

881

(self._datetime_to_dbus(self.last_approval_request,

882

variant_level=1)))

883

return r

884

885

1354

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

886

old_checker = self.checker

887

if self.checker is not None:

888

old_checker_pid = self.checker.pid

889

else:

890

old_checker_pid = None

1355

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

891

1356

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

892

1357

# Only if new checker process was started

893

1358

if (self.checker is not None

894

1359

and old_checker_pid != self.checker.pid):

895

1360

# Emit D-Bus signal

896

1361

self.CheckerStarted(self.current_checker_command)

897

self.PropertyChanged(

898

dbus.String("CheckerRunning"),

899

dbus.Boolean(True, variant_level=1))

900

1362

return r

901

1363

902

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

903

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

904

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

905

if (old_checker is not None

906

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

907

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

908

dbus.Boolean(False, variant_level=1))

909

return r

910

911

1364

def _reset_approved(self):

912

self._approved = None

1365

self.approved = None

913

1366

return False

914

1367

915

1368

def approve(self, value=True):

916

self.send_changedstate()

917

self._approved = value

918

gobject.timeout_add(self._timedelta_to_milliseconds

1369

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

919

1371

(self.approval_duration),

920

1372

self._reset_approved)

921

1373

self.send_changedstate()

922

1374

923

1375

## D-Bus methods, signals & properties

924

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

1376

_interface = "se.recompile.Mandos.Client"

1377

1378

## Interfaces

1379

1380

@dbus_interface_annotations(_interface)

1381

def _foo(self):

1382

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

1383

"false"}

925

1384

926

1385

## Signals

927

1386

1012

1471

def ApprovedByDefault_dbus_property(self, value=None):

1013

1472

if value is None: # get

1014

1473

return dbus.Boolean(self.approved_by_default)

1015

old_value = self.approved_by_default

1016

1474

self.approved_by_default = bool(value)

1017

# Emit D-Bus signal

1018

if old_value != self.approved_by_default:

1019

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

1020

dbus.Boolean(value, variant_level=1))

1021

1475

1022

1476

# ApprovalDelay - property

1023

1477

@dbus_service_property(_interface, signature="t",

1025

1479

def ApprovalDelay_dbus_property(self, value=None):

1026

1480

if value is None: # get

1027

1481

return dbus.UInt64(self.approval_delay_milliseconds())

1028

old_value = self.approval_delay

1029

1482

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

1030

# Emit D-Bus signal

1031

if old_value != self.approval_delay:

1032

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

1033

dbus.UInt64(value, variant_level=1))

1034

1483

1035

1484

# ApprovalDuration - property

1036

1485

@dbus_service_property(_interface, signature="t",

1037

1486

access="readwrite")

1038

1487

def ApprovalDuration_dbus_property(self, value=None):

1039

1488

if value is None: # get

1040

return dbus.UInt64(self._timedelta_to_milliseconds(

1489

return dbus.UInt64(timedelta_to_milliseconds(

1041

1490

self.approval_duration))

1042

old_value = self.approval_duration

1043

1491

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

1044

# Emit D-Bus signal

1045

if old_value != self.approval_duration:

1046

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

1047

dbus.UInt64(value, variant_level=1))

1048

1492

1049

1493

# Name - property

1050

1494

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

1062

1506

def Host_dbus_property(self, value=None):

1063

1507

if value is None: # get

1064

1508

return dbus.String(self.host)

1065

old_value = self.host

1066

self.host = value

1067

# Emit D-Bus signal

1068

if old_value != self.host:

1069

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

1070

dbus.String(value, variant_level=1))

1509

self.host = unicode(value)

1071

1510

1072

1511

# Created - property

1073

1512

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

1074

1513

def Created_dbus_property(self):

1075

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

1514

return datetime_to_dbus(self.created)

1076

1515

1077

1516

# LastEnabled - property

1078

1517

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

1079

1518

def LastEnabled_dbus_property(self):

1080

return self._datetime_to_dbus(self.last_enabled)

1519

return datetime_to_dbus(self.last_enabled)

1081

1520

1082

1521

# Enabled - property

1083

1522

@dbus_service_property(_interface, signature="b",

1097

1536

if value is not None:

1098

1537

self.checked_ok()

1099

1538

return

1100

return self._datetime_to_dbus(self.last_checked_ok)

1539

return datetime_to_dbus(self.last_checked_ok)

1540

1541

# LastCheckerStatus - property

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

1544

def LastCheckerStatus_dbus_property(self):

1545

return dbus.Int16(self.last_checker_status)

1101

1546

1102

1547

# Expires - property

1103

1548

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

1104

1549

def Expires_dbus_property(self):

1105

return self._datetime_to_dbus(self.expires)

1550

return datetime_to_dbus(self.expires)

1106

1551

1107

1552

# LastApprovalRequest - property

1108

1553

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

1109

1554

def LastApprovalRequest_dbus_property(self):

1110

return self._datetime_to_dbus(self.last_approval_request)

1555

return datetime_to_dbus(self.last_approval_request)

1111

1556

1112

1557

# Timeout - property

1113

1558

@dbus_service_property(_interface, signature="t",

1115

1560

def Timeout_dbus_property(self, value=None):

1116

1561

if value is None: # get

1117

1562

return dbus.UInt64(self.timeout_milliseconds())

1118

old_value = self.timeout

1563

old_timeout = self.timeout

1119

1564

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

1120

# Emit D-Bus signal

1121

if old_value != self.timeout:

1122

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

1123

dbus.UInt64(value, variant_level=1))

1124

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

1125

return

1126

# Reschedule timeout

1127

gobject.source_remove(self.disable_initiator_tag)

1128

self.disable_initiator_tag = None

1129

self.expires = None

1130

time_to_die = (self.

1131

_timedelta_to_milliseconds((self

1132

.last_checked_ok

1133

+ self.timeout)

1134

- datetime.datetime

1135

.utcnow()))

1136

if time_to_die <= 0:

1137

# The timeout has passed

1138

self.disable()

1139

else:

1140

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

1141

+ datetime.timedelta(milliseconds = time_to_die))

1142

self.disable_initiator_tag = (gobject.timeout_add

1143

(time_to_die, self.disable))

1144

1565

# Reschedule disabling

1566

if self.enabled:

1567

now = datetime.datetime.utcnow()

1568

self.expires += self.timeout - old_timeout

1569

if self.expires <= now:

1570

# The timeout has passed

1571

self.disable()

1572

else:

1573

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

1574

is None):

1575

return

1576

gobject.source_remove(self.disable_initiator_tag)

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

1581

1145

1582

# ExtendedTimeout - property

1146

1583

@dbus_service_property(_interface, signature="t",

1147

1584

access="readwrite")

1148

1585

def ExtendedTimeout_dbus_property(self, value=None):

1149

1586

if value is None: # get

1150

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

1151

old_value = self.extended_timeout

1152

1588

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

1153

# Emit D-Bus signal

1154

if old_value != self.extended_timeout:

1155

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

1156

dbus.UInt64(value, variant_level=1))

1157

1589

1158

1590

# Interval - property

1159

1591

@dbus_service_property(_interface, signature="t",

1160

1592

access="readwrite")

1161

1593

def Interval_dbus_property(self, value=None):

1162

1594

if value is None: # get

1163

1595

return dbus.UInt64(self.interval_milliseconds())

1164

old_value = self.interval

1165

1596

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

1166

# Emit D-Bus signal

1167

if old_value != self.interval:

1168

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

1169

dbus.UInt64(value, variant_level=1))

1170

1597

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

1171

1598

return

1172

# Reschedule checker run

1173

gobject.source_remove(self.checker_initiator_tag)

1174

self.checker_initiator_tag = (gobject.timeout_add

1175

(value, self.start_checker))

1176

self.start_checker() # Start one now, too

1177

1599

if self.enabled:

1600

# Reschedule checker run

1601

gobject.source_remove(self.checker_initiator_tag)

1602

self.checker_initiator_tag = (gobject.timeout_add

1603

(value, self.start_checker))

1604

self.start_checker() # Start one now, too

1605

1178

1606

# Checker - property

1179

1607

@dbus_service_property(_interface, signature="s",

1180

1608

access="readwrite")

1181

1609

def Checker_dbus_property(self, value=None):

1182

1610

if value is None: # get

1183

1611

return dbus.String(self.checker_command)

1184

old_value = self.checker_command

1185

self.checker_command = value

1186

# Emit D-Bus signal

1187

if old_value != self.checker_command:

1188

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

1189

dbus.String(self.checker_command,

1190

variant_level=1))

1612

self.checker_command = unicode(value)

1191

1613

1192

1614

# CheckerRunning - property

1193

1615

@dbus_service_property(_interface, signature="b",

1220

1642

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

1221

1643

if not self._pipe.recv():

1222

1644

raise KeyError()

1223

1645

1224

1646

def __getattribute__(self, name):

1225

if(name == '_pipe'):

1647

if name == '_pipe':

1226

1648

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

1227

1649

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

1228

1650

data = self._pipe.recv()

1233

1655

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

1234

1656

return self._pipe.recv()[1]

1235

1657

return func

1236

1658

1237

1659

def __setattr__(self, name, value):

1238

if(name == '_pipe'):

1660

if name == '_pipe':

1239

1661

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

1240

1662

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

1241

1663

1252

1674

unicode(self.client_address))

1253

1675

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

1254

1676

self.server.child_pipe.fileno())

1255

1677

1256

1678

session = (gnutls.connection

1257

1679

.ClientSession(self.request,

1258

1680

gnutls.connection

1259

1681

.X509Credentials()))

1260

1682

1261

1683

# Note: gnutls.connection.X509Credentials is really a

1262

1684

# generic GnuTLS certificate credentials object so long as

1263

1685

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

1264

1686

# here despite using OpenPGP certificates.

1265

1687

1266

1688

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

1267

1689

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

1268

1690

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

1274

1696

(gnutls.library.functions

1275

1697

.gnutls_priority_set_direct(session._c_object,

1276

1698

priority, None))

1277

1699

1278

1700

# Start communication using the Mandos protocol

1279

1701

# Get protocol number

1280

1702

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

1281

1703

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

1282

1704

try:

1283

1705

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

1284

raise RuntimeError

1706

raise RuntimeError(line)

1285

1707

except (ValueError, IndexError, RuntimeError) as error:

1286

1708

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

1287

1709

return

1288

1710

1289

1711

# Start GnuTLS connection

1290

1712

try:

1291

1713

session.handshake()

1295

1717

# established. Just abandon the request.

1296

1718

return

1297

1719

logger.debug("Handshake succeeded")

1298

1720

1299

1721

approval_required = False

1300

1722

try:

1301

1723

try:

1306

1728

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

1307

1729

return

1308

1730

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

1309

1731

1310

1732

try:

1311

1733

client = ProxyClient(child_pipe, fpr,

1312

1734

self.client_address)

1324

1746

client.name)

1325

1747

if self.server.use_dbus:

1326

1748

# Emit D-Bus signal

1327

client.Rejected("Disabled")

1749

client.Rejected("Disabled")

1328

1750

return

1329

1751

1330

if client._approved or not client.approval_delay:

1752

if client.approved or not client.approval_delay:

1331

1753

#We are approved or approval is disabled

1332

1754

break

1333

elif client._approved is None:

1755

elif client.approved is None:

1334

1756

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

1335

1757

client.name)

1336

1758

if self.server.use_dbus:

1347

1769

return

1348

1770

1349

1771

#wait until timeout or approved

1350

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

1351

1772

time = datetime.datetime.now()

1352

1773

client.changedstate.acquire()

1353

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

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

1354

1777

client.changedstate.release()

1355

1778

time2 = datetime.datetime.now()

1356

1779

if (time2 - time) >= delay:

1372

1795

try:

1373

1796

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

1374

1797

except gnutls.errors.GNUTLSError as error:

1375

logger.warning("gnutls send failed")

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1376

1800

return

1377

1801

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

1378

1802

sent, len(client.secret)

1379

1803

- (sent_size + sent))

1380

1804

sent_size += sent

1381

1805

1382

1806

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

1383

# bump the timeout as if seen

1384

client.checked_ok(client.extended_timeout)

1807

# bump the timeout using extended_timeout

1808

client.bump_timeout(client.extended_timeout)

1385

1809

if self.server.use_dbus:

1386

1810

# Emit D-Bus signal

1387

1811

client.GotSecret()

1392

1816

try:

1393

1817

session.bye()

1394

1818

except gnutls.errors.GNUTLSError as error:

1395

logger.warning("GnuTLS bye failed")

1819

logger.warning("GnuTLS bye failed",

1820

exc_info=error)

1396

1821

1397

1822

@staticmethod

1398

1823

def peer_certificate(session):

1454

1879

# Convert the buffer to a Python bytestring

1455

1880

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

1456

1881

# Convert the bytestring to hexadecimal notation

1457

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

1882

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

1458

1883

return hex_fpr

1459

1884

1460

1885

1463

1888

def sub_process_main(self, request, address):

1464

1889

try:

1465

1890

self.finish_request(request, address)

1466

except:

1891

except Exception:

1467

1892

self.handle_error(request, address)

1468

1893

self.close_request(request)

1469

1894

1470

1895

def process_request(self, request, address):

1471

1896

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

1472

multiprocessing.Process(target = self.sub_process_main,

1473

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

1897

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

1898

args = (request, address))

1899

proc.start()

1900

return proc

1901

1474

1902

1475

1903

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1476

1904

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

1480

1908

This function creates a new pipe in self.pipe

1481

1909

"""

1482

1910

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1483

1484

super(MultiprocessingMixInWithPipe,

1485

self).process_request(request, client_address)

1911

1912

proc = MultiprocessingMixIn.process_request(self, request,

1913

client_address)

1486

1914

self.child_pipe.close()

1487

self.add_pipe(parent_pipe)

1488

1489

def add_pipe(self, parent_pipe):

1915

self.add_pipe(parent_pipe, proc)

1916

1917

def add_pipe(self, parent_pipe, proc):

1490

1918

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

1491

raise NotImplementedError

1919

raise NotImplementedError()

1920

1492

1921

1493

1922

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1494

1923

socketserver.TCPServer, object):

1500

1929

use_ipv6: Boolean; to use IPv6 or not

1501

1930

"""

1502

1931

def __init__(self, server_address, RequestHandlerClass,

1503

interface=None, use_ipv6=True):

1932

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

1933

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

1934

creating a new one with socket.socket().

1935

"""

1504

1936

self.interface = interface

1505

1937

if use_ipv6:

1506

1938

self.address_family = socket.AF_INET6

1939

if socketfd is not None:

1940

# Save the file descriptor

1941

self.socketfd = socketfd

1942

# Save the original socket.socket() function

1943

self.socket_socket = socket.socket

1944

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

1945

#

1946

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

1947

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

1948

# patching socket.socket.)

1949

#

1950

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

1951

@functools.wraps(socket.socket)

1952

def socket_wrapper(*args, **kwargs):

1953

# Restore original function so subsequent calls are

1954

# not affected.

1955

socket.socket = self.socket_socket

1956

del self.socket_socket

1957

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

1958

# saved file descriptor.

1959

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

1960

# Replace socket.socket() function with wrapper

1961

socket.socket = socket_wrapper

1962

# The socketserver.TCPServer.__init__ will call

1963

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

1964

# socket_wrapper(), if socketfd was set.

1507

1965

socketserver.TCPServer.__init__(self, server_address,

1508

1966

RequestHandlerClass)

1967

1509

1968

def server_bind(self):

1510

1969

"""This overrides the normal server_bind() function

1511

1970

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

1519

1978

try:

1520

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1521

1980

SO_BINDTODEVICE,

1522

str(self.interface

1523

+ '\0'))

1981

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

1524

1982

except socket.error as error:

1525

if error[0] == errno.EPERM:

1526

logger.error("No permission to"

1527

" bind to interface %s",

1528

self.interface)

1529

elif error[0] == errno.ENOPROTOOPT:

1983

if error.errno == errno.EPERM:

1984

logger.error("No permission to bind to"

1985

" interface %s", self.interface)

1986

elif error.errno == errno.ENOPROTOOPT:

1530

1987

logger.error("SO_BINDTODEVICE not available;"

1531

1988

" cannot bind to interface %s",

1532

1989

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1533

1993

else:

1534

1994

raise

1535

1995

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

1538

1998

if self.address_family == socket.AF_INET6:

1539

1999

any_address = "::" # in6addr_any

1540

2000

else:

1541

any_address = socket.INADDR_ANY

2001

any_address = "0.0.0.0" # INADDR_ANY

1542

2002

self.server_address = (any_address,

1543

2003

self.server_address[1])

1544

2004

elif not self.server_address[1]:

1565

2025

"""

1566

2026

def __init__(self, server_address, RequestHandlerClass,

1567

2027

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

1568

gnutls_priority=None, use_dbus=True):

2028

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

1569

2029

self.enabled = False

1570

2030

self.clients = clients

1571

2031

if self.clients is None:

1572

self.clients = set()

2032

self.clients = {}

1573

2033

self.use_dbus = use_dbus

1574

2034

self.gnutls_priority = gnutls_priority

1575

2035

IPv6_TCPServer.__init__(self, server_address,

1576

2036

RequestHandlerClass,

1577

2037

interface = interface,

1578

use_ipv6 = use_ipv6)

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

1579

2040

def server_activate(self):

1580

2041

if self.enabled:

1581

2042

return socketserver.TCPServer.server_activate(self)

2043

1582

2044

def enable(self):

1583

2045

self.enabled = True

1584

def add_pipe(self, parent_pipe):

2046

2047

def add_pipe(self, parent_pipe, proc):

1585

2048

# Call "handle_ipc" for both data and EOF events

1586

2049

gobject.io_add_watch(parent_pipe.fileno(),

1587

2050

gobject.IO_IN | gobject.IO_HUP,

1588

2051

functools.partial(self.handle_ipc,

1589

parent_pipe = parent_pipe))

1590

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2055

1591

2056

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

1592

client_object=None):

1593

condition_names = {

1594

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

1595

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

1596

# blocking).

1597

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

1598

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

1599

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

1600

# broken, usually for pipes and

1601

# sockets).

1602

}

1603

conditions_string = ' | '.join(name

1604

for cond, name in

1605

condition_names.iteritems()

1606

if cond & condition)

1607

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

1608

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

2057

proc = None, client_object=None):

2058

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

2059

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

2060

# Wait for other process to exit

2061

proc.join()

1609

2062

return False

1610

2063

1611

2064

# Read a request from the child

1616

2069

fpr = request[1]

1617

2070

address = request[2]

1618

2071

1619

for c in self.clients:

2072

for c in self.clients.itervalues():

1620

2073

if c.fingerprint == fpr:

1621

2074

client = c

1622

2075

break

1625

2078

"dress: %s", fpr, address)

1626

2079

if self.use_dbus:

1627

2080

# Emit D-Bus signal

1628

mandos_dbus_service.ClientNotFound(fpr, address[0])

2081

mandos_dbus_service.ClientNotFound(fpr,

2082

address[0])

1629

2083

parent_pipe.send(False)

1630

2084

return False

1631

2085

1632

2086

gobject.io_add_watch(parent_pipe.fileno(),

1633

2087

gobject.IO_IN | gobject.IO_HUP,

1634

2088

functools.partial(self.handle_ipc,

1635

parent_pipe = parent_pipe,

1636

client_object = client))

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

client))

1637

2094

parent_pipe.send(True)

1638

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

2095

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

2096

# same fileno

1639

2097

return False

1640

2098

if command == 'funcall':

1641

2099

funcname = request[1]

1642

2100

args = request[2]

1643

2101

kwargs = request[3]

1644

2102

1645

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

1646

2103

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

2104

funcname)(*args,

2105

**kwargs)))

2106

1647

2107

if command == 'getattr':

1648

2108

attrname = request[1]

1649

2109

if callable(client_object.__getattribute__(attrname)):

1650

2110

parent_pipe.send(('function',))

1651

2111

else:

1652

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

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

1653

2114

1654

2115

if command == 'setattr':

1655

2116

attrname = request[1]

1656

2117

value = request[2]

1657

2118

setattr(client_object, attrname, value)

1658

2119

1659

2120

return True

1660

2121

1661

2122

2123

def rfc3339_duration_to_delta(duration):

2124

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

2125

2126

>>> rfc3339_duration_to_delta("P7D")

2127

datetime.timedelta(7)

2128

>>> rfc3339_duration_to_delta("PT60S")

2129

datetime.timedelta(0, 60)

2130

>>> rfc3339_duration_to_delta("PT60M")

2131

datetime.timedelta(0, 3600)

2132

>>> rfc3339_duration_to_delta("PT24H")

2133

datetime.timedelta(1)

2134

>>> rfc3339_duration_to_delta("P1W")

2135

datetime.timedelta(7)

2136

>>> rfc3339_duration_to_delta("PT5M30S")

2137

datetime.timedelta(0, 330)

2138

>>> rfc3339_duration_to_delta("P1DT3M20S")

2139

datetime.timedelta(1, 200)

2140

"""

2141

2142

# Parsing an RFC 3339 duration with regular expressions is not

2143

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

2144

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

2145

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

2146

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

2147

# avoid excessive use of external libraries.

2148

2149

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

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# this token

2159

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

2160

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

2161

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

2162

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

2163

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2165

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

2166

datetime.timedelta(minutes=1),

2167

frozenset((token_second, token_end)))

2168

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

2169

datetime.timedelta(hours=1),

2170

frozenset((token_minute, token_end)))

2171

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

2172

None,

2173

frozenset((token_hour, token_minute,

2174

token_second)))

2175

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

2176

datetime.timedelta(days=1),

2177

frozenset((token_time, token_end)))

2178

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

2179

datetime.timedelta(weeks=4),

2180

frozenset((token_day, token_end)))

2181

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

2182

datetime.timedelta(weeks=52),

2183

frozenset((token_month, token_end)))

2184

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

2185

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2187

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

2188

frozenset((token_year, token_month,

2189

token_day, token_time,

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2193

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2196

# Loop until end token is found

2197

while found_token is not token_end:

2198

# Search for any currently valid tokens

2199

for token in followers:

2200

match = token.regexp.match(s)

2201

if match is not None:

2202

# Token found

2203

if token.value is not None:

2204

# Value found, parse digits

2205

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

2206

# Add to value so far

2207

value += factor * token.value

2208

# Strip token from string

2209

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

2210

# Go to found token

2211

found_token = token

2212

# Set valid next tokens

2213

followers = found_token.followers

2214

break

2215

else:

2216

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2218

# End token found

2219

return value

2220

2221

1662

2222

def string_to_delta(interval):

1663

2223

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

1664

2224

1675

2235

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

1676

2236

datetime.timedelta(0, 330)

1677

2237

"""

2238

2239

try:

2240

return rfc3339_duration_to_delta(interval)

2241

except ValueError:

2242

pass

2243

1678

2244

timevalue = datetime.timedelta(0)

1679

2245

for s in interval.split():

1680

2246

try:

1691

2257

elif suffix == "w":

1692

2258

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

1693

2259

else:

1694

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

1695

except (ValueError, IndexError) as e:

2260

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

2261

.format(suffix))

2262

except IndexError as e:

1696

2263

raise ValueError(*(e.args))

1697

2264

timevalue += delta

1698

2265

return timevalue

1699

2266

1700

2267

1701

def if_nametoindex(interface):

1702

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

1703

1704

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

1705

global if_nametoindex

1706

try:

1707

if_nametoindex = (ctypes.cdll.LoadLibrary

1708

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

1709

.if_nametoindex)

1710

except (OSError, AttributeError):

1711

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

1712

def if_nametoindex(interface):

1713

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

1714

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

1715

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

1716

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1717

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

1718

interface))

1719

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

1720

ifreq[16:20])[0]

1721

return interface_index

1722

return if_nametoindex(interface)

1723

1724

1725

2268

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

1726

2269

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

1727

2270

1735

2278

sys.exit()

1736

2279

if not noclose:

1737

2280

# Close all standard open file descriptors

1738

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

2281

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

1739

2282

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

1740

2283

raise OSError(errno.ENODEV,

1741

"%s not a character device"

1742

% os.path.devnull)

2284

"{0} not a character device"

2285

.format(os.devnull))

1743

2286

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

1744

2287

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

1745

2288

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

1754

2297

1755

2298

parser = argparse.ArgumentParser()

1756

2299

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

1757

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

2300

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

1758

2301

help="show version number and exit")

1759

2302

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

1760

2303

help="Bind to interface IF")

1766

2309

help="Run self-test")

1767

2310

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

1768

2311

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

1769

" to terminal")

2312

" to terminal", default=None)

1770

2313

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

1771

2314

help="Debug level for stdout output")

1772

2315

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

1779

2322

" files")

1780

2323

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

1781

2324

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

1782

" system bus interface")

2325

" system bus interface", default=None)

1783

2326

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

1784

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

2327

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

2328

default=None)

2329

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

2330

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

2331

" state", default=None)

2332

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

2333

help="Specify a file descriptor to a network"

2334

" socket to use instead of creating one")

2335

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

2336

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

2337

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

2338

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

2339

1785

2340

options = parser.parse_args()

1786

2341

1787

2342

if options.check:

1788

2343

import doctest

1789

doctest.testmod()

1790

sys.exit()

2344

fail_count, test_count = doctest.testmod()

2345

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

1791

2346

1792

2347

# Default values for config file for server-global settings

1793

2348

server_defaults = { "interface": "",

1795

2350

"port": "",

1796

2351

"debug": "False",

1797

2352

"priority":

1798

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

2353

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

1799

2354

"servicename": "Mandos",

1800

2355

"use_dbus": "True",

1801

2356

"use_ipv6": "True",

1802

2357

"debuglevel": "",

2358

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

1803

2362

}

1804

2363

1805

2364

# Parse config file for server-global settings

1810

2369

# Convert the SafeConfigParser object to a dict

1811

2370

server_settings = server_config.defaults()

1812

2371

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

1813

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

2372

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

1814

2373

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

1815

2374

option)

1816

2375

if server_settings["port"]:

1817

2376

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

1818

2377

"port")

2378

if server_settings["socket"]:

2379

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

2380

"socket")

2381

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

2382

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

2383

# happen with a supplied network socket.

2384

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

2385

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

2386

["socket"])

1819

2387

del server_config

1820

2388

1821

2389

# Override the settings from the config file with command line

1822

2390

# options, if set.

1823

2391

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

1824

2392

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

1825

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

2393

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

2394

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

1826

2395

value = getattr(options, option)

1827

2396

if value is not None:

1828

2397

server_settings[option] = value

1831

2400

for option in server_settings.keys():

1832

2401

if type(server_settings[option]) is str:

1833

2402

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

2403

# Force all boolean options to be boolean

2404

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

2405

"foreground"):

2406

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

2407

# Debug implies foreground

2408

if server_settings["debug"]:

2409

server_settings["foreground"] = True

1834

2410

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

1835

2411

1836

2412

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

1840

2416

debuglevel = server_settings["debuglevel"]

1841

2417

use_dbus = server_settings["use_dbus"]

1842

2418

use_ipv6 = server_settings["use_ipv6"]

1843

2419

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

2420

stored_state_file)

2421

foreground = server_settings["foreground"]

2422

2423

if debug:

2424

initlogger(debug, logging.DEBUG)

2425

else:

2426

if not debuglevel:

2427

initlogger(debug)

2428

else:

2429

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

2430

initlogger(debug, level)

2431

1844

2432

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

1845

2433

syslogger.setFormatter(logging.Formatter

1846

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

1847

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

1848

% server_settings["servicename"]))

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

1849

2438

1850

2439

# Parse config file with clients

1851

client_defaults = { "timeout": "5m",

1852

"extended_timeout": "15m",

1853

"interval": "2m",

1854

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

1855

"host": "",

1856

"approval_delay": "0s",

1857

"approval_duration": "1s",

1858

}

1859

client_config = configparser.SafeConfigParser(client_defaults)

2440

client_config = configparser.SafeConfigParser(Client

2441

.client_defaults)

1860

2442

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

1861

2443

"clients.conf"))

1862

2444

1871

2453

use_ipv6=use_ipv6,

1872

2454

gnutls_priority=

1873

2455

server_settings["priority"],

1874

use_dbus=use_dbus)

1875

if not debug:

1876

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

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

2459

if not foreground:

2460

pidfilename = "/run/mandos.pid"

2461

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

2462

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

2463

pidfile = None

1877

2464

try:

1878

2465

pidfile = open(pidfilename, "w")

1879

except IOError:

1880

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

2466

except IOError as e:

2467

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

2468

exc_info=e)

1881

2469

1882

try:

1883

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

1884

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

1885

except KeyError:

2470

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

1886

2471

try:

1887

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

1888

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

2472

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2474

break

1889

2475

except KeyError:

1890

try:

1891

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

1892

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

1893

except KeyError:

1894

uid = 65534

1895

gid = 65534

2476

continue

2477

else:

2478

uid = 65534

2479

gid = 65534

1896

2480

try:

1897

2481

os.setgid(gid)

1898

2482

os.setuid(uid)

1899

2483

except OSError as error:

1900

if error[0] != errno.EPERM:

1901

raise error

2484

if error.errno != errno.EPERM:

2485

raise

1902

2486

1903

if not debug and not debuglevel:

1904

syslogger.setLevel(logging.WARNING)

1905

console.setLevel(logging.WARNING)

1906

if debuglevel:

1907

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

1908

syslogger.setLevel(level)

1909

console.setLevel(level)

1910

1911

2487

if debug:

1912

2488

# Enable all possible GnuTLS debugging

1913

2489

1923

2499

.gnutls_global_set_log_function(debug_gnutls))

1924

2500

1925

2501

# Redirect stdin so all checkers get /dev/null

1926

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

2502

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

1927

2503

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

1928

2504

if null > 2:

1929

2505

os.close(null)

1930

else:

1931

# No console logging

1932

logger.removeHandler(console)

1933

2506

1934

2507

# Need to fork before connecting to D-Bus

1935

if not debug:

2508

if not foreground:

1936

2509

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

1937

2510

daemon()

1938

2511

2512

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

2513

# need to inform gobject that threads will be used.

2514

gobject.threads_init()

2515

1939

2516

global main_loop

1940

2517

# From the Avahi example code

1941

DBusGMainLoop(set_as_default=True )

2518

DBusGMainLoop(set_as_default=True)

1942

2519

main_loop = gobject.MainLoop()

1943

2520

bus = dbus.SystemBus()

1944

2521

# End of Avahi example code

1945

2522

if use_dbus:

1946

2523

try:

1947

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

2524

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

1948

2525

bus, do_not_queue=True)

2526

old_bus_name = (dbus.service.BusName

2527

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

2528

do_not_queue=True))

1949

2529

except dbus.exceptions.NameExistsException as e:

1950

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

2530

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

1951

2531

use_dbus = False

1952

2532

server_settings["use_dbus"] = False

1953

2533

tcp_server.use_dbus = False

1954

2534

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1955

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

1956

servicetype = "_mandos._tcp",

1957

protocol = protocol, bus = bus)

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

1958

2539

if server_settings["interface"]:

1959

2540

service.interface = (if_nametoindex

1960

2541

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

1965

2546

client_class = Client

1966

2547

if use_dbus:

1967

2548

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

1968

def client_config_items(config, section):

1969

special_settings = {

1970

"approved_by_default":

1971

lambda: config.getboolean(section,

1972

"approved_by_default"),

1973

}

1974

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

2549

2550

client_settings = Client.config_parser(client_config)

2551

old_client_settings = {}

2552

clients_data = {}

2553

2554

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

2555

global wnull

2556

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

2557

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

2558

# mode

2559

if debug or not foreground:

2560

wnull.close()

2561

2562

# Get client data and settings from last running state.

2563

if server_settings["restore"]:

2564

try:

2565

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

2566

clients_data, old_client_settings = (pickle.load

2567

(stored_state))

2568

os.remove(stored_state_path)

2569

except IOError as e:

2570

if e.errno == errno.ENOENT:

2571

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

2572

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

2573

else:

2574

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

2575

exc_info=e)

2576

raise

2577

except EOFError as e:

2578

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

2579

"EOFError:", exc_info=e)

2580

2581

with PGPEngine() as pgp:

2582

for client_name, client in clients_data.iteritems():

2583

# Skip removed clients

2584

if client_name not in client_settings:

2585

continue

2586

2587

# Decide which value to use after restoring saved state.

2588

# We have three different values: Old config file,

2589

# new config file, and saved state.

2590

# New config value takes precedence if it differs from old

2591

# config value, otherwise use saved state.

2592

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

2593

try:

2594

# For each value in new config, check if it

2595

# differs from the old config value (Except for

2596

# the "secret" attribute)

2597

if (name != "secret" and

2598

value != old_client_settings[client_name]

2599

[name]):

2600

client[name] = value

2601

except KeyError:

2602

pass

2603

2604

# Clients who has passed its expire date can still be

2605

# enabled if its last checker was successful. Clients

2606

# whose checker succeeded before we stored its state is

2607

# assumed to have successfully run all checkers during

2608

# downtime.

2609

if client["enabled"]:

2610

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

2611

if not client["last_checked_ok"]:

2612

logger.warning(

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

2616

client["enabled"] = False

2617

elif client["last_checker_status"] != 0:

2618

logger.warning(

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

client["last_checker_status"]))

2623

client["enabled"] = False

2624

else:

2625

client["expires"] = (datetime.datetime

2626

.utcnow()

2627

+ client["timeout"])

2628

logger.debug("Last checker succeeded,"

2629

" keeping {0} enabled"

2630

.format(client_name))

1975

2631

try:

1976

yield (name, special_settings[name]())

1977

except KeyError:

1978

yield (name, value)

1979

1980

tcp_server.clients.update(set(

1981

client_class(name = section,

1982

config= dict(client_config_items(

1983

client_config, section)))

1984

for section in client_config.sections()))

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

2636

except PGPError:

2637

# If decryption fails, we use secret from new settings

2638

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

2639

.format(client_name))

2640

client["secret"] = (

2641

client_settings[client_name]["secret"])

2642

2643

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

2644

for client_name in (set(old_client_settings)

2645

- set(client_settings)):

2646

del clients_data[client_name]

2647

for client_name in (set(client_settings)

2648

- set(old_client_settings)):

2649

clients_data[client_name] = client_settings[client_name]

2650

2651

# Create all client objects

2652

for client_name, client in clients_data.iteritems():

2653

tcp_server.clients[client_name] = client_class(

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2656

1985

2657

if not tcp_server.clients:

1986

2658

logger.warning("No clients defined")

1987

1988

if not debug:

1989

try:

1990

with pidfile:

1991

pid = os.getpid()

1992

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

1993

del pidfile

1994

except IOError:

1995

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

1996

pidfilename, pid)

1997

except NameError:

1998

# "pidfile" was never created

1999

pass

2659

2660

if not foreground:

2661

if pidfile is not None:

2662

try:

2663

with pidfile:

2664

pid = os.getpid()

2665

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

2666

except IOError:

2667

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

2668

pidfilename, pid)

2669

del pidfile

2000

2670

del pidfilename

2001

2002

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

2003

2671

2004

2672

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

2005

2673

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

2006

2674

2007

2675

if use_dbus:

2008

class MandosDBusService(dbus.service.Object):

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

2009

2679

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

2010

2680

def __init__(self):

2011

2681

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

2012

_interface = "se.bsnet.fukt.Mandos"

2682

_interface = "se.recompile.Mandos"

2683

2684

@dbus_interface_annotations(_interface)

2685

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

2013

2689

2014

2690

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

2015

2691

def ClientAdded(self, objpath):

2030

2706

def GetAllClients(self):

2031

2707

"D-Bus method"

2032

2708

return dbus.Array(c.dbus_object_path

2033

for c in tcp_server.clients)

2709

for c in

2710

tcp_server.clients.itervalues())

2034

2711

2035

2712

@dbus.service.method(_interface,

2036

2713

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

2038

2715

"D-Bus method"

2039

2716

return dbus.Dictionary(

2040

2717

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

2041

for c in tcp_server.clients),

2718

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

2042

2719

signature="oa{sv}")

2043

2720

2044

2721

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

2045

2722

def RemoveClient(self, object_path):

2046

2723

"D-Bus method"

2047

for c in tcp_server.clients:

2724

for c in tcp_server.clients.itervalues():

2048

2725

if c.dbus_object_path == object_path:

2049

tcp_server.clients.remove(c)

2726

del tcp_server.clients[c.name]

2050

2727

c.remove_from_connection()

2051

2728

# Don't signal anything except ClientRemoved

2052

2729

c.disable(quiet=True)

2063

2740

"Cleanup function; run on exit"

2064

2741

service.cleanup()

2065

2742

2743

multiprocessing.active_children()

2744

wnull.close()

2745

if not (tcp_server.clients or client_settings):

2746

return

2747

2748

# Store client before exiting. Secrets are encrypted with key

2749

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

2750

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

2751

clients = {}

2752

with PGPEngine() as pgp:

2753

for client in tcp_server.clients.itervalues():

2754

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

2755

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

2756

key)

2757

client_dict = {}

2758

2759

# A list of attributes that can not be pickled

2760

# + secret.

2761

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

2762

"checker", "server_settings"))

2763

for name, typ in (inspect.getmembers

2764

(dbus.service.Object)):

2765

exclude.add(name)

2766

2767

client_dict["encrypted_secret"] = (client

2768

.encrypted_secret)

2769

for attr in client.client_structure:

2770

if attr not in exclude:

2771

client_dict[attr] = getattr(client, attr)

2772

2773

clients[client.name] = client_dict

2774

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

2775

2776

try:

2777

with (tempfile.NamedTemporaryFile

2778

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

2779

dir=os.path.dirname(stored_state_path),

2780

delete=False)) as stored_state:

2781

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

2782

tempname=stored_state.name

2783

os.rename(tempname, stored_state_path)

2784

except (IOError, OSError) as e:

2785

if not debug:

2786

try:

2787

os.remove(tempname)

2788

except NameError:

2789

pass

2790

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

2791

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

2792

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

2793

else:

2794

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

2795

exc_info=e)

2796

raise

2797

2798

# Delete all clients, and settings from config

2066

2799

while tcp_server.clients:

2067

client = tcp_server.clients.pop()

2800

name, client = tcp_server.clients.popitem()

2068

2801

if use_dbus:

2069

2802

client.remove_from_connection()

2070

client.disable_hook = None

2071

2803

# Don't signal anything except ClientRemoved

2072

2804

client.disable(quiet=True)

2073

2805

if use_dbus:

2074

2806

# Emit D-Bus signal

2075

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2076

2809

client.name)

2810

client_settings.clear()

2077

2811

2078

2812

atexit.register(cleanup)

2079

2813

2080

for client in tcp_server.clients:

2814

for client in tcp_server.clients.itervalues():

2081

2815

if use_dbus:

2082

2816

# Emit D-Bus signal

2083

2817

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2084

client.enable()

2818

# Need to initiate checking of clients

2819

if client.enabled:

2820

client.init_checker()

2085

2821

2086

2822

tcp_server.enable()

2087

2823

tcp_server.server_activate()

2090

2826

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

2091

2827

if use_ipv6:

2092

2828

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

2093

" flowinfo %d, scope_id %d"

2094

% tcp_server.socket.getsockname())

2829

" flowinfo %d, scope_id %d",

2830

*tcp_server.socket.getsockname())

2095

2831

else: # IPv4

2096

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

2097

% tcp_server.socket.getsockname())

2832

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

2833

*tcp_server.socket.getsockname())

2098

2834

2099

2835

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

2100

2836

2103

2839

try:

2104

2840

service.activate()

2105

2841

except dbus.exceptions.DBusException as error:

2106

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

2842

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

2107

2843

cleanup()

2108

2844

sys.exit(1)

2109

2845

# End of Avahi example code

2116

2852

logger.debug("Starting main loop")

2117

2853

main_loop.run()

2118

2854

except AvahiError as error:

2119

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

2855

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

2120

2856

cleanup()

2121

2857

sys.exit(1)

2122

2858

except KeyboardInterrupt: