/mandos/trunk : revision 482

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@recompile.se>.

31

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

32

#

33

34

from __future__ import (division, absolute_import, print_function,

35

unicode_literals)

36

37

from future_builtins import *

38

39

37

import SocketServer as socketserver

40

38

import socket

41

39

import argparse

64

62

import functools

65

63

import cPickle as pickle

66

64

import multiprocessing

67

import types

68

import binascii

69

import tempfile

70

import itertools

71

import collections

72

65

73

66

import dbus

74

67

import dbus.service

88

81

except ImportError:

89

82

SO_BINDTODEVICE = None

90

83

91

version = "1.6.5"

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

84

85

version = "1.3.0"

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)

222

102

223

103

class AvahiError(Exception):

224

104

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

242

122

Used to optionally bind to the specified interface.

243

123

name: string; Example: 'Mandos'

244

124

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

245

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

125

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

246

126

port: integer; what port to announce

247

127

TXT: list of strings; TXT record for the service

248

128

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

254

134

server: D-Bus Server

255

135

bus: dbus.SystemBus()

256

136

"""

257

258

137

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

259

138

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

260

139

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

273

152

self.server = None

274

153

self.bus = bus

275

154

self.entry_group_state_changed_match = None

276

277

155

def rename(self):

278

156

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

279

157

if self.rename_count >= self.max_renames:

281

159

" after %i retries, exiting.",

282

160

self.rename_count)

283

161

raise AvahiServiceError("Too many renames")

284

self.name = unicode(self.server

285

.GetAlternativeServiceName(self.name))

162

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

286

163

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

287

164

self.name)

165

syslogger.setFormatter(logging.Formatter

166

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

167

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

168

% self.name))

288

169

self.remove()

289

170

try:

290

171

self.add()

291

172

except dbus.exceptions.DBusException as error:

292

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

173

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

293

174

self.cleanup()

294

175

os._exit(1)

295

176

self.rename_count += 1

296

297

177

def remove(self):

298

178

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

179

if self.group is not None:

180

try:

181

self.group.Free()

182

except (dbus.exceptions.UnknownMethodException,

183

dbus.exceptions.DBusException) as e:

184

pass

185

self.group = None

299

186

if self.entry_group_state_changed_match is not None:

300

187

self.entry_group_state_changed_match.remove()

301

188

self.entry_group_state_changed_match = None

302

if self.group is not None:

303

self.group.Reset()

304

305

189

def add(self):

306

190

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

307

191

self.remove()

308

if self.group is None:

309

self.group = dbus.Interface(

310

self.bus.get_object(avahi.DBUS_NAME,

311

self.server.EntryGroupNew()),

312

avahi.DBUS_INTERFACE_ENTRY_GROUP)

192

self.group = dbus.Interface(

193

self.bus.get_object(avahi.DBUS_NAME,

194

self.server.EntryGroupNew(),

195

follow_name_owner_changes=True),

196

avahi.DBUS_INTERFACE_ENTRY_GROUP)

313

197

self.entry_group_state_changed_match = (

314

198

self.group.connect_to_signal(

315

'StateChanged', self.entry_group_state_changed))

199

'StateChanged', self .entry_group_state_changed))

316

200

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

317

201

self.name, self.type)

318

202

self.group.AddService(

324

208

dbus.UInt16(self.port),

325

209

avahi.string_array_to_txt_array(self.TXT))

326

210

self.group.Commit()

327

328

211

def entry_group_state_changed(self, state, error):

329

212

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

330

213

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

337

220

elif state == avahi.ENTRY_GROUP_FAILURE:

338

221

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

339

222

unicode(error))

340

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

341

.format(error))

342

223

raise AvahiGroupError("State changed: %s"

224

% unicode(error))

343

225

def cleanup(self):

344

226

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

345

if self.group is not None:

346

try:

347

self.group.Free()

348

except (dbus.exceptions.UnknownMethodException,

349

dbus.exceptions.DBusException):

350

pass

351

self.group = None

352

227

self.remove()

353

354

228

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

355

229

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

356

230

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

362

236

avahi.SERVER_FAILURE:

363

237

"Zeroconf server failure" }

364

238

if state in bad_states:

365

if bad_states[state] is not None:

366

if error is None:

367

logger.error(bad_states[state])

368

else:

369

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

370

self.cleanup()

239

if bad_states[state]:

240

logger.error(bad_states[state])

241

self.remove()

371

242

elif state == avahi.SERVER_RUNNING:

372

243

self.add()

373

244

else:

374

if error is None:

375

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

376

else:

377

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

378

245

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

379

246

def activate(self):

380

247

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

381

248

if self.server is None:

389

256

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

390

257

391

258

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

410

259

class Client(object):

411

260

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

412

261

413

262

Attributes:

414

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

263

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

415

264

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

416

265

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

417

266

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

424

273

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

425

274

checker_initiator_tag: a gobject event source tag, or None

426

275

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

429

276

current_checker_command: string; current running checker_command

277

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

430

278

disable_initiator_tag: a gobject event source tag, or None

431

279

enabled: bool()

432

280

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

435

283

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

436

284

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

437

285

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

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

286

last_enabled: datetime.datetime(); (UTC)

442

287

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

443

288

D-Bus identifiers

444

289

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

445

290

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

446

291

until this client is disabled

447

extended_timeout: extra long timeout when secret has been sent

448

292

runtime_expansions: Allowed attributes for runtime expansion.

449

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

450

disabled, or None

451

server_settings: The server_settings dict from main()

452

293

"""

453

294

454

295

runtime_expansions = ("approval_delay", "approval_duration",

455

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

456

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

457

"last_approval_request", "last_checked_ok",

296

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

297

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

458

298

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

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

}

299

300

@staticmethod

301

def _timedelta_to_milliseconds(td):

302

"Convert a datetime.timedelta() to milliseconds"

303

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

304

+ (td.seconds * 1000)

305

+ (td.microseconds // 1000))

469

306

470

307

def timeout_milliseconds(self):

471

308

"Return the 'timeout' attribute in milliseconds"

472

return timedelta_to_milliseconds(self.timeout)

473

474

def extended_timeout_milliseconds(self):

475

"Return the 'extended_timeout' attribute in milliseconds"

476

return timedelta_to_milliseconds(self.extended_timeout)

309

return self._timedelta_to_milliseconds(self.timeout)

477

310

478

311

def interval_milliseconds(self):

479

312

"Return the 'interval' attribute in milliseconds"

480

return timedelta_to_milliseconds(self.interval)

481

313

return self._timedelta_to_milliseconds(self.interval)

314

482

315

def approval_delay_milliseconds(self):

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):

316

return self._timedelta_to_milliseconds(self.approval_delay)

317

318

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

319

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

320

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

321

attribute."""

533

322

self.name = name

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

323

if config is None:

324

config = {}

551

325

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

552

326

# Uppercase and remove spaces from fingerprint for later

553

327

# comparison purposes with return value from the fingerprint()

554

328

# function

329

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

330

.replace(" ", ""))

555

331

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

556

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

557

datetime.datetime.utcnow())

558

559

# attributes specific for this server instance

332

if "secret" in config:

333

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

334

elif "secfile" in config:

335

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

336

(config["secfile"])),

337

"rb") as secfile:

338

self.secret = secfile.read()

339

else:

340

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

341

% self.name)

342

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

343

self.created = datetime.datetime.utcnow()

344

self.enabled = False

345

self.last_approval_request = None

346

self.last_enabled = None

347

self.last_checked_ok = None

348

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

349

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

350

self.disable_hook = disable_hook

560

351

self.checker = None

561

352

self.checker_initiator_tag = None

562

353

self.disable_initiator_tag = None

563

354

self.checker_callback_tag = None

355

self.checker_command = config["checker"]

564

356

self.current_checker_command = None

565

self.approved = None

357

self.last_connect = None

358

self._approved = None

359

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

360

True)

566

361

self.approvals_pending = 0

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)

362

self.approval_delay = string_to_delta(

363

config["approval_delay"])

364

self.approval_duration = string_to_delta(

365

config["approval_duration"])

366

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

581

367

582

# Send notice to process children that client state has changed

583

368

def send_changedstate(self):

584

with self.changedstate:

585

self.changedstate.notify_all()

586

369

self.changedstate.acquire()

370

self.changedstate.notify_all()

371

self.changedstate.release()

372

587

373

def enable(self):

588

374

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

589

375

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

590

376

# Already enabled

591

377

return

592

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

593

self.enabled = True

378

self.send_changedstate()

594

379

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):

622

380

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

623

381

# and every interval from then on.

624

if self.checker_initiator_tag is not None:

625

gobject.source_remove(self.checker_initiator_tag)

626

382

self.checker_initiator_tag = (gobject.timeout_add

627

383

(self.interval_milliseconds(),

628

384

self.start_checker))

629

385

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

630

if self.disable_initiator_tag is not None:

631

gobject.source_remove(self.disable_initiator_tag)

632

386

self.disable_initiator_tag = (gobject.timeout_add

633

387

(self.timeout_milliseconds(),

634

388

self.disable))

389

self.enabled = True

635

390

# Also start a new checker *right now*.

636

391

self.start_checker()

637

392

393

def disable(self, quiet=True):

394

"""Disable this client."""

395

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

396

return False

397

if not quiet:

398

self.send_changedstate()

399

if not quiet:

400

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

401

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

402

gobject.source_remove(self.disable_initiator_tag)

403

self.disable_initiator_tag = None

404

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

405

gobject.source_remove(self.checker_initiator_tag)

406

self.checker_initiator_tag = None

407

self.stop_checker()

408

if self.disable_hook:

409

self.disable_hook(self)

410

self.enabled = False

411

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

412

return False

413

414

def __del__(self):

415

self.disable_hook = None

416

self.disable()

417

638

418

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

639

419

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

640

420

self.checker_callback_tag = None

641

421

self.checker = None

642

422

if os.WIFEXITED(condition):

643

self.last_checker_status = os.WEXITSTATUS(condition)

644

if self.last_checker_status == 0:

423

exitstatus = os.WEXITSTATUS(condition)

424

if exitstatus == 0:

645

425

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

646

426

vars(self))

647

427

self.checked_ok()

649

429

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

650

430

vars(self))

651

431

else:

652

self.last_checker_status = -1

653

432

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

654

433

vars(self))

655

434

656

435

def checked_ok(self):

657

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

436

"""Bump up the timeout for this client.

437

438

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

439

alive and well.

440

"""

658

441

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."""

664

if timeout is None:

665

timeout = self.timeout

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

442

gobject.source_remove(self.disable_initiator_tag)

443

self.disable_initiator_tag = (gobject.timeout_add

444

(self.timeout_milliseconds(),

445

self.disable))

674

446

675

447

def need_approval(self):

676

448

self.last_approval_request = datetime.datetime.utcnow()

681

453

If a checker already exists, leave it running and do

682

454

nothing."""

683

455

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

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

456

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

457

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

458

# client would inevitably timeout, since no checker would get

459

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

688

460

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

689

461

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

690

462

# should be.

692

464

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

693

465

try:

694

466

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

695

except AttributeError:

696

pass

697

except OSError as error:

698

if error.errno != errno.ECHILD:

699

raise

467

except (AttributeError, OSError) as error:

468

if (isinstance(error, OSError)

469

and error.errno != errno.ECHILD):

470

raise error

700

471

else:

701

472

if pid:

702

473

logger.warning("Checker was a zombie")

705

476

self.current_checker_command)

706

477

# Start a new checker if needed

707

478

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)

713

479

try:

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

480

# In case checker_command has exactly one % operator

481

command = self.checker_command % self.host

482

except TypeError:

483

# Escape attributes for the shell

484

escaped_attrs = dict(

485

(attr,

486

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

487

errors=

488

'replace')))

489

for attr in

490

self.runtime_expansions)

491

492

try:

493

command = self.checker_command % escaped_attrs

494

except TypeError as error:

495

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

496

' %s', self.checker_command, error)

497

return True # Try again later

719

498

self.current_checker_command = command

720

499

try:

721

500

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

724

503

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

725

504

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

726

505

# 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 })

735

506

self.checker = subprocess.Popen(command,

736

507

close_fds=True,

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:

508

shell=True, cwd="/")

509

self.checker_callback_tag = (gobject.child_watch_add

510

(self.checker.pid,

511

self.checker_callback,

512

data=command))

513

# The checker may have completed before the gobject

514

# watch was added. Check for this.

750

515

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

516

if pid:

517

gobject.source_remove(self.checker_callback_tag)

518

self.checker_callback(pid, status, command)

751

519

except OSError as 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)

520

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

521

error)

761

522

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

762

523

return True

763

524

770

531

return

771

532

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

772

533

try:

773

self.checker.terminate()

534

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

774

535

#time.sleep(0.5)

775

536

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

776

# self.checker.kill()

537

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

777

538

except OSError as error:

778

539

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

779

540

raise

780

541

self.checker = None

781

542

782

783

543

def dbus_service_property(dbus_interface, signature="v",

784

544

access="readwrite", byte_arrays=False):

785

545

"""Decorators for marking methods of a DBusObjectWithProperties to

796

556

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

797

557

if byte_arrays and signature != "ay":

798

558

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

799

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

559

" signature %r" % signature)

800

560

def decorator(func):

801

561

func._dbus_is_property = True

802

562

func._dbus_interface = dbus_interface

810

570

return decorator

811

571

812

572

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

850

573

class DBusPropertyException(dbus.exceptions.DBusException):

851

574

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

852

575

"""

868

591

869

592

class DBusObjectWithProperties(dbus.service.Object):

870

593

"""A D-Bus object with properties.

871

594

872

595

Classes inheriting from this can use the dbus_service_property

873

596

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

874

597

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

875

598

"""

876

599

877

600

@staticmethod

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)

601

def _is_dbus_property(obj):

602

return getattr(obj, "_dbus_is_property", False)

886

603

887

def _get_all_dbus_things(self, thing):

604

def _get_all_dbus_properties(self):

888

605

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

889

606

"""

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)))

607

return ((prop._dbus_name, prop)

608

for name, prop in

609

inspect.getmembers(self, self._is_dbus_property))

897

610

898

611

def _get_dbus_property(self, interface_name, property_name):

899

612

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

900

613

property with the specified name and interface.

901

614

"""

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

615

for name in (property_name,

616

property_name + "_dbus_property"):

617

prop = getattr(self, name, None)

618

if (prop is None

619

or not self._is_dbus_property(prop)

620

or prop._dbus_name != property_name

621

or (interface_name and prop._dbus_interface

622

and interface_name != prop._dbus_interface)):

623

continue

624

return prop

910

625

# No such property

911

626

raise DBusPropertyNotFound(self.dbus_object_path + ":"

912

627

+ interface_name + "."

936

651

# The byte_arrays option is not supported yet on

937

652

# signatures other than "ay".

938

653

if prop._dbus_signature != "ay":

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))

654

raise ValueError

655

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

656

for byte in value))

944

657

prop(value)

945

658

946

659

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

948

661

def GetAll(self, interface_name):

949

662

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

950

663

standard.

951

664

952

665

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

953

666

"""

954

properties = {}

955

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

667

all = {}

668

for name, prop in self._get_all_dbus_properties():

956

669

if (interface_name

957

670

and interface_name != prop._dbus_interface):

958

671

# Interface non-empty but did not match

962

675

continue

963

676

value = prop()

964

677

if not hasattr(value, "variant_level"):

965

properties[name] = value

678

all[name] = value

966

679

continue

967

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

968

value.variant_level+1)

969

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

680

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

681

value.variant_level+1)

682

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

970

683

971

684

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

972

685

out_signature="s",

973

686

path_keyword='object_path',

974

687

connection_keyword='connection')

975

688

def Introspect(self, object_path, connection):

976

"""Overloading of standard D-Bus method.

977

978

Inserts property tags and interface annotation tags.

689

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

979

690

"""

980

691

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

981

692

connection)

988

699

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

989

700

return e

990

701

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

991

# Add property tags

992

702

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

993

703

for name, prop

994

in self._get_all_dbus_things("property")

704

in self._get_all_dbus_properties()

995

705

if prop._dbus_interface

996

706

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

997

707

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)

1029

708

# Add the names to the return values for the

1030

709

# "org.freedesktop.DBus.Properties" methods

1031

710

if (if_tag.getAttribute("name")

1046

725

except (AttributeError, xml.dom.DOMException,

1047

726

xml.parsers.expat.ExpatError) as error:

1048

727

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

1049

exc_info=error)

728

error)

1050

729

return xmlstring

1051

730

1052

731

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"})

1232

732

class ClientDBus(Client, DBusObjectWithProperties):

1233

733

"""A Client class using D-Bus

1234

734

1243

743

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

1244

744

1245

745

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

746

self._approvals_pending = 0

1246

747

self.bus = bus

1247

748

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

1248

749

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

1254

755

("/clients/" + client_object_name))

1255

756

DBusObjectWithProperties.__init__(self, self.bus,

1256

757

self.dbus_object_path)

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

758

759

def _get_approvals_pending(self):

760

return self._approvals_pending

761

def _set_approvals_pending(self, value):

762

old_value = self._approvals_pending

763

self._approvals_pending = value

764

bval = bool(value)

765

if (hasattr(self, "dbus_object_path")

766

and bval is not bool(old_value)):

767

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

768

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

769

dbus_bool)

770

771

approvals_pending = property(_get_approvals_pending,

772

_set_approvals_pending)

773

del _get_approvals_pending, _set_approvals_pending

774

775

@staticmethod

776

def _datetime_to_dbus(dt, variant_level=0):

777

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

778

return dbus.String(dt.isoformat(),

779

variant_level=variant_level)

780

781

def enable(self):

782

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

783

r = Client.enable(self)

784

if oldstate != self.enabled:

785

# Emit D-Bus signals

786

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

787

dbus.Boolean(True, variant_level=1))

788

self.PropertyChanged(

789

dbus.String("LastEnabled"),

790

self._datetime_to_dbus(self.last_enabled,

791

variant_level=1))

792

return r

793

794

def disable(self, quiet = False):

795

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

796

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

797

if not quiet and oldstate != self.enabled:

798

# Emit D-Bus signal

799

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

800

dbus.Boolean(False, variant_level=1))

801

return r

1325

802

1326

803

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

1327

804

try:

1336

813

*args, **kwargs):

1337

814

self.checker_callback_tag = None

1338

815

self.checker = None

816

# Emit D-Bus signal

817

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

818

dbus.Boolean(False, variant_level=1))

1339

819

if os.WIFEXITED(condition):

1340

820

exitstatus = os.WEXITSTATUS(condition)

1341

821

# Emit D-Bus signal

1351

831

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

1352

832

*args, **kwargs)

1353

833

834

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

835

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

836

# Emit D-Bus signal

837

self.PropertyChanged(

838

dbus.String("LastCheckedOK"),

839

(self._datetime_to_dbus(self.last_checked_ok,

840

variant_level=1)))

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastApprovalRequest"),

847

(self._datetime_to_dbus(self.last_approval_request,

848

variant_level=1)))

849

return r

850

1354

851

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

1355

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

852

old_checker = self.checker

853

if self.checker is not None:

854

old_checker_pid = self.checker.pid

855

else:

856

old_checker_pid = None

1356

857

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

1357

858

# Only if new checker process was started

1358

859

if (self.checker is not None

1359

860

and old_checker_pid != self.checker.pid):

1360

861

# Emit D-Bus signal

1361

862

self.CheckerStarted(self.current_checker_command)

863

self.PropertyChanged(

864

dbus.String("CheckerRunning"),

865

dbus.Boolean(True, variant_level=1))

1362

866

return r

1363

867

868

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

869

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

870

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

871

if (old_checker is not None

872

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

873

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

874

dbus.Boolean(False, variant_level=1))

875

return r

876

1364

877

def _reset_approved(self):

1365

self.approved = None

878

self._approved = None

1366

879

return False

1367

880

1368

881

def approve(self, value=True):

1369

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

882

self.send_changedstate()

883

self._approved = value

884

gobject.timeout_add(self._timedelta_to_milliseconds

1371

885

(self.approval_duration),

1372

886

self._reset_approved)

1373

self.send_changedstate()

887

1374

888

1375

889

## D-Bus methods, signals & properties

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"}

890

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

1384

891

1385

892

## Signals

1386

893

1472

979

if value is None: # get

1473

980

return dbus.Boolean(self.approved_by_default)

1474

981

self.approved_by_default = bool(value)

982

# Emit D-Bus signal

983

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

984

dbus.Boolean(value, variant_level=1))

1475

985

1476

986

# ApprovalDelay - property

1477

987

@dbus_service_property(_interface, signature="t",

1480

990

if value is None: # get

1481

991

return dbus.UInt64(self.approval_delay_milliseconds())

1482

992

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

993

# Emit D-Bus signal

994

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

995

dbus.UInt64(value, variant_level=1))

1483

996

1484

997

# ApprovalDuration - property

1485

998

@dbus_service_property(_interface, signature="t",

1486

999

access="readwrite")

1487

1000

def ApprovalDuration_dbus_property(self, value=None):

1488

1001

if value is None: # get

1489

return dbus.UInt64(timedelta_to_milliseconds(

1002

return dbus.UInt64(self._timedelta_to_milliseconds(

1490

1003

self.approval_duration))

1491

1004

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

1005

# Emit D-Bus signal

1006

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

1007

dbus.UInt64(value, variant_level=1))

1492

1008

1493

1009

# Name - property

1494

1010

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

1506

1022

def Host_dbus_property(self, value=None):

1507

1023

if value is None: # get

1508

1024

return dbus.String(self.host)

1509

self.host = unicode(value)

1025

self.host = value

1026

# Emit D-Bus signal

1027

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

1028

dbus.String(value, variant_level=1))

1510

1029

1511

1030

# Created - property

1512

1031

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

1513

1032

def Created_dbus_property(self):

1514

return datetime_to_dbus(self.created)

1033

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

1515

1034

1516

1035

# LastEnabled - property

1517

1036

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

1518

1037

def LastEnabled_dbus_property(self):

1519

return datetime_to_dbus(self.last_enabled)

1038

if self.last_enabled is None:

1039

return dbus.String("")

1040

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

1520

1041

1521

1042

# Enabled - property

1522

1043

@dbus_service_property(_interface, signature="b",

1536

1057

if value is not None:

1537

1058

self.checked_ok()

1538

1059

return

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)

1546

1547

# Expires - property

1548

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

1549

def Expires_dbus_property(self):

1550

return datetime_to_dbus(self.expires)

1060

if self.last_checked_ok is None:

1061

return dbus.String("")

1062

return dbus.String(self._datetime_to_dbus(self

1063

.last_checked_ok))

1551

1064

1552

1065

# LastApprovalRequest - property

1553

1066

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

1554

1067

def LastApprovalRequest_dbus_property(self):

1555

return datetime_to_dbus(self.last_approval_request)

1068

if self.last_approval_request is None:

1069

return dbus.String("")

1070

return dbus.String(self.

1071

_datetime_to_dbus(self

1072

.last_approval_request))

1556

1073

1557

1074

# Timeout - property

1558

1075

@dbus_service_property(_interface, signature="t",

1560

1077

def Timeout_dbus_property(self, value=None):

1561

1078

if value is None: # get

1562

1079

return dbus.UInt64(self.timeout_milliseconds())

1563

old_timeout = self.timeout

1564

1080

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

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

1582

# ExtendedTimeout - property

1583

@dbus_service_property(_interface, signature="t",

1584

access="readwrite")

1585

def ExtendedTimeout_dbus_property(self, value=None):

1586

if value is None: # get

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

1588

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

1081

# Emit D-Bus signal

1082

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

1083

dbus.UInt64(value, variant_level=1))

1084

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

1085

return

1086

# Reschedule timeout

1087

gobject.source_remove(self.disable_initiator_tag)

1088

self.disable_initiator_tag = None

1089

time_to_die = (self.

1090

_timedelta_to_milliseconds((self

1091

.last_checked_ok

1092

+ self.timeout)

1093

- datetime.datetime

1094

.utcnow()))

1095

if time_to_die <= 0:

1096

# The timeout has passed

1097

self.disable()

1098

else:

1099

self.disable_initiator_tag = (gobject.timeout_add

1100

(time_to_die, self.disable))

1589

1101

1590

1102

# Interval - property

1591

1103

@dbus_service_property(_interface, signature="t",

1594

1106

if value is None: # get

1595

1107

return dbus.UInt64(self.interval_milliseconds())

1596

1108

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

1109

# Emit D-Bus signal

1110

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

1111

dbus.UInt64(value, variant_level=1))

1597

1112

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

1598

1113

return

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

1114

# Reschedule checker run

1115

gobject.source_remove(self.checker_initiator_tag)

1116

self.checker_initiator_tag = (gobject.timeout_add

1117

(value, self.start_checker))

1118

self.start_checker() # Start one now, too

1119

1606

1120

# Checker - property

1607

1121

@dbus_service_property(_interface, signature="s",

1608

1122

access="readwrite")

1609

1123

def Checker_dbus_property(self, value=None):

1610

1124

if value is None: # get

1611

1125

return dbus.String(self.checker_command)

1612

self.checker_command = unicode(value)

1126

self.checker_command = value

1127

# Emit D-Bus signal

1128

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

1129

dbus.String(self.checker_command,

1130

variant_level=1))

1613

1131

1614

1132

# CheckerRunning - property

1615

1133

@dbus_service_property(_interface, signature="b",

1642

1160

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

1643

1161

if not self._pipe.recv():

1644

1162

raise KeyError()

1645

1163

1646

1164

def __getattribute__(self, name):

1647

if name == '_pipe':

1165

if(name == '_pipe'):

1648

1166

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

1649

1167

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

1650

1168

data = self._pipe.recv()

1655

1173

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

1656

1174

return self._pipe.recv()[1]

1657

1175

return func

1658

1176

1659

1177

def __setattr__(self, name, value):

1660

if name == '_pipe':

1178

if(name == '_pipe'):

1661

1179

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

1662

1180

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

1663

1181

1674

1192

unicode(self.client_address))

1675

1193

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

1676

1194

self.server.child_pipe.fileno())

1677

1195

1678

1196

session = (gnutls.connection

1679

1197

.ClientSession(self.request,

1680

1198

gnutls.connection

1681

1199

.X509Credentials()))

1682

1200

1683

1201

# Note: gnutls.connection.X509Credentials is really a

1684

1202

# generic GnuTLS certificate credentials object so long as

1685

1203

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

1686

1204

# here despite using OpenPGP certificates.

1687

1205

1688

1206

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

1689

1207

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

1690

1208

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

1696

1214

(gnutls.library.functions

1697

1215

.gnutls_priority_set_direct(session._c_object,

1698

1216

priority, None))

1699

1217

1700

1218

# Start communication using the Mandos protocol

1701

1219

# Get protocol number

1702

1220

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

1703

1221

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

1704

1222

try:

1705

1223

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

1706

raise RuntimeError(line)

1224

raise RuntimeError

1707

1225

except (ValueError, IndexError, RuntimeError) as error:

1708

1226

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

1709

1227

return

1710

1228

1711

1229

# Start GnuTLS connection

1712

1230

try:

1713

1231

session.handshake()

1717

1235

# established. Just abandon the request.

1718

1236

return

1719

1237

logger.debug("Handshake succeeded")

1720

1238

1721

1239

approval_required = False

1722

1240

try:

1723

1241

try:

1728

1246

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

1729

1247

return

1730

1248

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

1731

1249

1732

1250

try:

1733

1251

client = ProxyClient(child_pipe, fpr,

1734

1252

self.client_address)

1742

1260

1743

1261

while True:

1744

1262

if not client.enabled:

1745

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

1263

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

1746

1264

client.name)

1747

1265

if self.server.use_dbus:

1748

1266

# Emit D-Bus signal

1749

client.Rejected("Disabled")

1267

client.Rejected("Disabled")

1750

1268

return

1751

1269

1752

if client.approved or not client.approval_delay:

1270

if client._approved or not client.approval_delay:

1753

1271

#We are approved or approval is disabled

1754

1272

break

1755

elif client.approved is None:

1273

elif client._approved is None:

1756

1274

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

1757

1275

client.name)

1758

1276

if self.server.use_dbus:

1769

1287

return

1770

1288

1771

1289

#wait until timeout or approved

1290

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

1772

1291

time = datetime.datetime.now()

1773

1292

client.changedstate.acquire()

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

1293

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

1777

1294

client.changedstate.release()

1778

1295

time2 = datetime.datetime.now()

1779

1296

if (time2 - time) >= delay:

1795

1312

try:

1796

1313

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

1797

1314

except gnutls.errors.GNUTLSError as error:

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1315

logger.warning("gnutls send failed")

1800

1316

return

1801

1317

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

1802

1318

sent, len(client.secret)

1803

1319

- (sent_size + sent))

1804

1320

sent_size += sent

1805

1321

1806

1322

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

1807

# bump the timeout using extended_timeout

1808

client.bump_timeout(client.extended_timeout)

1323

# bump the timeout as if seen

1324

client.checked_ok()

1809

1325

if self.server.use_dbus:

1810

1326

# Emit D-Bus signal

1811

1327

client.GotSecret()

1816

1332

try:

1817

1333

session.bye()

1818

1334

except gnutls.errors.GNUTLSError as error:

1819

logger.warning("GnuTLS bye failed",

1820

exc_info=error)

1335

logger.warning("GnuTLS bye failed")

1821

1336

1822

1337

@staticmethod

1823

1338

def peer_certificate(session):

1879

1394

# Convert the buffer to a Python bytestring

1880

1395

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

1881

1396

# Convert the bytestring to hexadecimal notation

1882

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

1397

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

1883

1398

return hex_fpr

1884

1399

1885

1400

1888

1403

def sub_process_main(self, request, address):

1889

1404

try:

1890

1405

self.finish_request(request, address)

1891

except Exception:

1406

except:

1892

1407

self.handle_error(request, address)

1893

1408

self.close_request(request)

1894

1409

1895

1410

def process_request(self, request, address):

1896

1411

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

1897

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

1898

args = (request, address))

1899

proc.start()

1900

return proc

1901

1412

multiprocessing.Process(target = self.sub_process_main,

1413

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

1902

1414

1903

1415

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1904

1416

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

1908

1420

This function creates a new pipe in self.pipe

1909

1421

"""

1910

1422

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1911

1912

proc = MultiprocessingMixIn.process_request(self, request,

1913

client_address)

1423

1424

super(MultiprocessingMixInWithPipe,

1425

self).process_request(request, client_address)

1914

1426

self.child_pipe.close()

1915

self.add_pipe(parent_pipe, proc)

1916

1917

def add_pipe(self, parent_pipe, proc):

1427

self.add_pipe(parent_pipe)

1428

1429

def add_pipe(self, parent_pipe):

1918

1430

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

1919

raise NotImplementedError()

1920

1431

raise NotImplementedError

1921

1432

1922

1433

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1923

1434

socketserver.TCPServer, object):

1929

1440

use_ipv6: Boolean; to use IPv6 or not

1930

1441

"""

1931

1442

def __init__(self, server_address, RequestHandlerClass,

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

"""

1443

interface=None, use_ipv6=True):

1936

1444

self.interface = interface

1937

1445

if use_ipv6:

1938

1446

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.

1965

1447

socketserver.TCPServer.__init__(self, server_address,

1966

1448

RequestHandlerClass)

1967

1968

1449

def server_bind(self):

1969

1450

"""This overrides the normal server_bind() function

1970

1451

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

1978

1459

try:

1979

1460

self.socket.setsockopt(socket.SOL_SOCKET,

1980

1461

SO_BINDTODEVICE,

1981

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

1462

str(self.interface

1463

+ '\0'))

1982

1464

except socket.error as error:

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:

1465

if error[0] == errno.EPERM:

1466

logger.error("No permission to"

1467

" bind to interface %s",

1468

self.interface)

1469

elif error[0] == errno.ENOPROTOOPT:

1987

1470

logger.error("SO_BINDTODEVICE not available;"

1988

1471

" cannot bind to interface %s",

1989

1472

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1993

1473

else:

1994

1474

raise

1995

1475

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

1998

1478

if self.address_family == socket.AF_INET6:

1999

1479

any_address = "::" # in6addr_any

2000

1480

else:

2001

any_address = "0.0.0.0" # INADDR_ANY

1481

any_address = socket.INADDR_ANY

2002

1482

self.server_address = (any_address,

2003

1483

self.server_address[1])

2004

1484

elif not self.server_address[1]:

2025

1505

"""

2026

1506

def __init__(self, server_address, RequestHandlerClass,

2027

1507

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

2028

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

1508

gnutls_priority=None, use_dbus=True):

2029

1509

self.enabled = False

2030

1510

self.clients = clients

2031

1511

if self.clients is None:

2032

self.clients = {}

1512

self.clients = set()

2033

1513

self.use_dbus = use_dbus

2034

1514

self.gnutls_priority = gnutls_priority

2035

1515

IPv6_TCPServer.__init__(self, server_address,

2036

1516

RequestHandlerClass,

2037

1517

interface = interface,

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

1518

use_ipv6 = use_ipv6)

2040

1519

def server_activate(self):

2041

1520

if self.enabled:

2042

1521

return socketserver.TCPServer.server_activate(self)

2043

2044

1522

def enable(self):

2045

1523

self.enabled = True

2046

2047

def add_pipe(self, parent_pipe, proc):

1524

def add_pipe(self, parent_pipe):

2048

1525

# Call "handle_ipc" for both data and EOF events

2049

1526

gobject.io_add_watch(parent_pipe.fileno(),

2050

1527

gobject.IO_IN | gobject.IO_HUP,

2051

1528

functools.partial(self.handle_ipc,

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2055

1529

parent_pipe = parent_pipe))

1530

2056

1531

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

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()

1532

client_object=None):

1533

condition_names = {

1534

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

1535

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

1536

# blocking).

1537

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

1538

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

1539

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

1540

# broken, usually for pipes and

1541

# sockets).

1542

}

1543

conditions_string = ' | '.join(name

1544

for cond, name in

1545

condition_names.iteritems()

1546

if cond & condition)

1547

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

1548

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

2062

1549

return False

2063

1550

2064

1551

# Read a request from the child

2069

1556

fpr = request[1]

2070

1557

address = request[2]

2071

1558

2072

for c in self.clients.itervalues():

1559

for c in self.clients:

2073

1560

if c.fingerprint == fpr:

2074

1561

client = c

2075

1562

break

2076

1563

else:

2077

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

2078

"dress: %s", fpr, address)

1564

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

1565

"dress: %s", fpr, address)

2079

1566

if self.use_dbus:

2080

1567

# Emit D-Bus signal

2081

mandos_dbus_service.ClientNotFound(fpr,

2082

address[0])

1568

mandos_dbus_service.ClientNotFound(fpr, address[0])

2083

1569

parent_pipe.send(False)

2084

1570

return False

2085

1571

2086

1572

gobject.io_add_watch(parent_pipe.fileno(),

2087

1573

gobject.IO_IN | gobject.IO_HUP,

2088

1574

functools.partial(self.handle_ipc,

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

client))

1575

parent_pipe = parent_pipe,

1576

client_object = client))

2094

1577

parent_pipe.send(True)

2095

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

2096

# same fileno

1578

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

2097

1579

return False

2098

1580

if command == 'funcall':

2099

1581

funcname = request[1]

2100

1582

args = request[2]

2101

1583

kwargs = request[3]

2102

1584

2103

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

2104

funcname)(*args,

2105

**kwargs)))

2106

1585

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

1586

2107

1587

if command == 'getattr':

2108

1588

attrname = request[1]

2109

1589

if callable(client_object.__getattribute__(attrname)):

2110

1590

parent_pipe.send(('function',))

2111

1591

else:

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

1592

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

2114

1593

2115

1594

if command == 'setattr':

2116

1595

attrname = request[1]

2117

1596

value = request[2]

2118

1597

setattr(client_object, attrname, value)

2119

1598

2120

1599

return True

2121

1600

2122

1601

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

2222

1602

def string_to_delta(interval):

2223

1603

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

2224

1604

2235

1615

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

2236

1616

datetime.timedelta(0, 330)

2237

1617

"""

2238

2239

try:

2240

return rfc3339_duration_to_delta(interval)

2241

except ValueError:

2242

pass

2243

2244

1618

timevalue = datetime.timedelta(0)

2245

1619

for s in interval.split():

2246

1620

try:

2257

1631

elif suffix == "w":

2258

1632

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

2259

1633

else:

2260

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

2261

.format(suffix))

2262

except IndexError as e:

1634

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

1635

except (ValueError, IndexError) as e:

2263

1636

raise ValueError(*(e.args))

2264

1637

timevalue += delta

2265

1638

return timevalue

2266

1639

2267

1640

1641

def if_nametoindex(interface):

1642

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

1643

1644

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

1645

global if_nametoindex

1646

try:

1647

if_nametoindex = (ctypes.cdll.LoadLibrary

1648

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

1649

.if_nametoindex)

1650

except (OSError, AttributeError):

1651

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

1652

def if_nametoindex(interface):

1653

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

1654

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

1655

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

1656

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1657

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

1658

interface))

1659

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

1660

ifreq[16:20])[0]

1661

return interface_index

1662

return if_nametoindex(interface)

1663

1664

2268

1665

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

2269

1666

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

2270

1667

2278

1675

sys.exit()

2279

1676

if not noclose:

2280

1677

# Close all standard open file descriptors

2281

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

1678

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

2282

1679

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

2283

1680

raise OSError(errno.ENODEV,

2284

"{0} not a character device"

2285

.format(os.devnull))

1681

"%s not a character device"

1682

% os.path.devnull)

2286

1683

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

2287

1684

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

2288

1685

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

2297

1694

2298

1695

parser = argparse.ArgumentParser()

2299

1696

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

2300

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

1697

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

2301

1698

help="show version number and exit")

2302

1699

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

2303

1700

help="Bind to interface IF")

2309

1706

help="Run self-test")

2310

1707

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

2311

1708

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

2312

" to terminal", default=None)

1709

" to terminal")

2313

1710

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

2314

1711

help="Debug level for stdout output")

2315

1712

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

2322

1719

" files")

2323

1720

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

2324

1721

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

2325

" system bus interface", default=None)

1722

" system bus interface")

2326

1723

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

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

1724

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

2340

1725

options = parser.parse_args()

2341

1726

2342

1727

if options.check:

2343

1728

import doctest

2344

fail_count, test_count = doctest.testmod()

2345

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

1729

doctest.testmod()

1730

sys.exit()

2346

1731

2347

1732

# Default values for config file for server-global settings

2348

1733

server_defaults = { "interface": "",

2350

1735

"port": "",

2351

1736

"debug": "False",

2352

1737

"priority":

2353

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

1738

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

2354

1739

"servicename": "Mandos",

2355

1740

"use_dbus": "True",

2356

1741

"use_ipv6": "True",

2357

1742

"debuglevel": "",

2358

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

2362

1743

}

2363

1744

2364

1745

# Parse config file for server-global settings

2369

1750

# Convert the SafeConfigParser object to a dict

2370

1751

server_settings = server_config.defaults()

2371

1752

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

2372

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

1753

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

2373

1754

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

2374

1755

option)

2375

1756

if server_settings["port"]:

2376

1757

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

2377

1758

"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"])

2387

1759

del server_config

2388

1760

2389

1761

# Override the settings from the config file with command line

2390

1762

# options, if set.

2391

1763

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

2392

1764

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

2393

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

2394

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

1765

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

2395

1766

value = getattr(options, option)

2396

1767

if value is not None:

2397

1768

server_settings[option] = value

2400

1771

for option in server_settings.keys():

2401

1772

if type(server_settings[option]) is str:

2402

1773

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

2410

1774

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

2411

1775

2412

1776

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

2416

1780

debuglevel = server_settings["debuglevel"]

2417

1781

use_dbus = server_settings["use_dbus"]

2418

1782

use_ipv6 = server_settings["use_ipv6"]

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

1783

2432

1784

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

2433

1785

syslogger.setFormatter(logging.Formatter

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

1786

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

1787

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

1788

% server_settings["servicename"]))

2438

1789

2439

1790

# Parse config file with clients

2440

client_config = configparser.SafeConfigParser(Client

2441

.client_defaults)

1791

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

1792

"interval": "5m",

1793

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

1794

"host": "",

1795

"approval_delay": "0s",

1796

"approval_duration": "1s",

1797

}

1798

client_config = configparser.SafeConfigParser(client_defaults)

2442

1799

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

2443

1800

"clients.conf"))

2444

1801

2453

1810

use_ipv6=use_ipv6,

2454

1811

gnutls_priority=

2455

1812

server_settings["priority"],

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

1813

use_dbus=use_dbus)

1814

if not debug:

1815

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

2464

1816

try:

2465

1817

pidfile = open(pidfilename, "w")

2466

except IOError as e:

2467

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

2468

exc_info=e)

1818

except IOError:

1819

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

2469

1820

2470

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

1821

try:

1822

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

1823

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

1824

except KeyError:

2471

1825

try:

2472

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2474

break

1826

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

1827

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

2475

1828

except KeyError:

2476

continue

2477

else:

2478

uid = 65534

2479

gid = 65534

1829

try:

1830

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

1831

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

1832

except KeyError:

1833

uid = 65534

1834

gid = 65534

2480

1835

try:

2481

1836

os.setgid(gid)

2482

1837

os.setuid(uid)

2483

1838

except OSError as error:

2484

if error.errno != errno.EPERM:

2485

raise

1839

if error[0] != errno.EPERM:

1840

raise error

2486

1841

1842

if not debug and not debuglevel:

1843

syslogger.setLevel(logging.WARNING)

1844

console.setLevel(logging.WARNING)

1845

if debuglevel:

1846

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

1847

syslogger.setLevel(level)

1848

console.setLevel(level)

1849

2487

1850

if debug:

2488

1851

# Enable all possible GnuTLS debugging

2489

1852

2499

1862

.gnutls_global_set_log_function(debug_gnutls))

2500

1863

2501

1864

# Redirect stdin so all checkers get /dev/null

2502

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

1865

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

2503

1866

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

2504

1867

if null > 2:

2505

1868

os.close(null)

1869

else:

1870

# No console logging

1871

logger.removeHandler(console)

2506

1872

2507

1873

# Need to fork before connecting to D-Bus

2508

if not foreground:

1874

if not debug:

2509

1875

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

2510

1876

daemon()

2511

1877

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

2516

1878

global main_loop

2517

1879

# From the Avahi example code

2518

DBusGMainLoop(set_as_default=True)

1880

DBusGMainLoop(set_as_default=True )

2519

1881

main_loop = gobject.MainLoop()

2520

1882

bus = dbus.SystemBus()

2521

1883

# End of Avahi example code

2522

1884

if use_dbus:

2523

1885

try:

2524

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

1886

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

2525

1887

bus, do_not_queue=True)

2526

old_bus_name = (dbus.service.BusName

2527

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

2528

do_not_queue=True))

2529

1888

except dbus.exceptions.NameExistsException as e:

2530

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

1889

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

2531

1890

use_dbus = False

2532

1891

server_settings["use_dbus"] = False

2533

1892

tcp_server.use_dbus = False

2534

1893

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

1894

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

1895

servicetype = "_mandos._tcp",

1896

protocol = protocol, bus = bus)

2539

1897

if server_settings["interface"]:

2540

1898

service.interface = (if_nametoindex

2541

1899

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

2546

1904

client_class = Client

2547

1905

if use_dbus:

2548

1906

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

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))

1907

def client_config_items(config, section):

1908

special_settings = {

1909

"approved_by_default":

1910

lambda: config.getboolean(section,

1911

"approved_by_default"),

1912

}

1913

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

2631

1914

try:

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

1915

yield (name, special_settings[name]())

1916

except KeyError:

1917

yield (name, value)

1918

1919

tcp_server.clients.update(set(

1920

client_class(name = section,

1921

config= dict(client_config_items(

1922

client_config, section)))

1923

for section in client_config.sections()))

2657

1924

if not tcp_server.clients:

2658

1925

logger.warning("No clients defined")

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

1926

1927

if not debug:

1928

try:

1929

with pidfile:

1930

pid = os.getpid()

1931

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

1932

del pidfile

1933

except IOError:

1934

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

1935

pidfilename, pid)

1936

except NameError:

1937

# "pidfile" was never created

1938

pass

2670

1939

del pidfilename

2671

1940

1941

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

1942

2672

1943

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

2673

1944

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

2674

1945

2675

1946

if use_dbus:

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

1947

class MandosDBusService(dbus.service.Object):

2679

1948

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

2680

1949

def __init__(self):

2681

1950

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

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"}

1951

_interface = "se.bsnet.fukt.Mandos"

2689

1952

2690

1953

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

2691

1954

def ClientAdded(self, objpath):

2706

1969

def GetAllClients(self):

2707

1970

"D-Bus method"

2708

1971

return dbus.Array(c.dbus_object_path

2709

for c in

2710

tcp_server.clients.itervalues())

1972

for c in tcp_server.clients)

2711

1973

2712

1974

@dbus.service.method(_interface,

2713

1975

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

2715

1977

"D-Bus method"

2716

1978

return dbus.Dictionary(

2717

1979

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

2718

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

1980

for c in tcp_server.clients),

2719

1981

signature="oa{sv}")

2720

1982

2721

1983

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

2722

1984

def RemoveClient(self, object_path):

2723

1985

"D-Bus method"

2724

for c in tcp_server.clients.itervalues():

1986

for c in tcp_server.clients:

2725

1987

if c.dbus_object_path == object_path:

2726

del tcp_server.clients[c.name]

1988

tcp_server.clients.remove(c)

2727

1989

c.remove_from_connection()

2728

1990

# Don't signal anything except ClientRemoved

2729

1991

c.disable(quiet=True)

2740

2002

"Cleanup function; run on exit"

2741

2003

service.cleanup()

2742

2004

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

2799

2005

while tcp_server.clients:

2800

name, client = tcp_server.clients.popitem()

2006

client = tcp_server.clients.pop()

2801

2007

if use_dbus:

2802

2008

client.remove_from_connection()

2009

client.disable_hook = None

2803

2010

# Don't signal anything except ClientRemoved

2804

2011

client.disable(quiet=True)

2805

2012

if use_dbus:

2806

2013

# Emit D-Bus signal

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2014

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2809

2015

client.name)

2810

client_settings.clear()

2811

2016

2812

2017

atexit.register(cleanup)

2813

2018

2814

for client in tcp_server.clients.itervalues():

2019

for client in tcp_server.clients:

2815

2020

if use_dbus:

2816

2021

# Emit D-Bus signal

2817

2022

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2818

# Need to initiate checking of clients

2819

if client.enabled:

2820

client.init_checker()

2023

client.enable()

2821

2024

2822

2025

tcp_server.enable()

2823

2026

tcp_server.server_activate()

2826

2029

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

2827

2030

if use_ipv6:

2828

2031

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

2829

" flowinfo %d, scope_id %d",

2830

*tcp_server.socket.getsockname())

2032

" flowinfo %d, scope_id %d"

2033

% tcp_server.socket.getsockname())

2831

2034

else: # IPv4

2832

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

2833

*tcp_server.socket.getsockname())

2035

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

2036

% tcp_server.socket.getsockname())

2834

2037

2835

2038

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

2836

2039

2839

2042

try:

2840

2043

service.activate()

2841

2044

except dbus.exceptions.DBusException as error:

2842

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

2045

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

2843

2046

cleanup()

2844

2047

sys.exit(1)

2845

2048

# End of Avahi example code

2852

2055

logger.debug("Starting main loop")

2853

2056

main_loop.run()

2854

2057

except AvahiError as error:

2855

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

2058

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

2856

2059

cleanup()

2857

2060

sys.exit(1)

2858

2061

except KeyboardInterrupt: