/mandos/trunk : revision 502.1.1

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

31

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

32

#

33

34

from __future__ import division, with_statement, absolute_import

34

from __future__ import (division, absolute_import, print_function,

35

unicode_literals)

35

36

37

import SocketServer as socketserver

37

38

import socket

38

import optparse

39

import argparse

39

40

import datetime

40

41

import errno

41

42

import gnutls.crypto

55

56

import logging

56

57

import logging.handlers

57

58

import pwd

58

from contextlib import closing

59

import contextlib

59

60

import struct

60

61

import fcntl

61

62

import functools

63

import cPickle as pickle

64

import multiprocessing

62

65

63

66

import dbus

64

67

import dbus.service

79

82

SO_BINDTODEVICE = None

80

83

81

84

82

version = "1.0.12"

85

version = "1.3.1"

83

86

84

logger = logging.Logger(u'mandos')

87

#logger = logging.getLogger('mandos')

88

logger = logging.Logger('mandos')

85

89

syslogger = (logging.handlers.SysLogHandler

86

90

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

87

address = "/dev/log"))

91

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

88

92

syslogger.setFormatter(logging.Formatter

89

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

90

u' %(message)s'))

93

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

94

' %(message)s'))

91

95

logger.addHandler(syslogger)

92

96

93

97

console = logging.StreamHandler()

94

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

95

u' %(levelname)s:'

96

u' %(message)s'))

98

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

99

' %(levelname)s:'

100

' %(message)s'))

97

101

logger.addHandler(console)

98

102

99

103

class AvahiError(Exception):

116

120

Attributes:

117

121

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

118

122

Used to optionally bind to the specified interface.

119

120

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

123

124

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

121

125

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

122

126

port: integer; what port to announce

123

127

TXT: list of strings; TXT record for the service

132

136

"""

133

137

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

134

138

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

135

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

139

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

136

140

protocol = avahi.PROTO_UNSPEC, bus = None):

137

141

self.interface = interface

138

142

self.name = name

147

151

self.group = None # our entry group

148

152

self.server = None

149

153

self.bus = bus

154

self.entry_group_state_changed_match = None

150

155

def rename(self):

151

156

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

152

157

if self.rename_count >= self.max_renames:

153

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

154

u" after %i retries, exiting.",

158

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

159

" after %i retries, exiting.",

155

160

self.rename_count)

156

raise AvahiServiceError(u"Too many renames")

157

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

158

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

159

unicode(self.name))

161

raise AvahiServiceError("Too many renames")

162

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

163

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

164

self.name)

160

165

syslogger.setFormatter(logging.Formatter

161

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

162

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

166

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

167

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

163

168

% self.name))

164

169

self.remove()

165

self.add()

170

try:

171

self.add()

172

except dbus.exceptions.DBusException as error:

173

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

174

self.cleanup()

175

os._exit(1)

166

176

self.rename_count += 1

167

177

def remove(self):

168

178

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

179

if self.entry_group_state_changed_match is not None:

180

self.entry_group_state_changed_match.remove()

181

self.entry_group_state_changed_match = None

169

182

if self.group is not None:

170

183

self.group.Reset()

171

184

def add(self):

172

185

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

186

self.remove()

173

187

if self.group is None:

174

188

self.group = dbus.Interface(

175

189

self.bus.get_object(avahi.DBUS_NAME,

176

190

self.server.EntryGroupNew()),

177

191

avahi.DBUS_INTERFACE_ENTRY_GROUP)

178

self.group.connect_to_signal('StateChanged',

179

self

180

.entry_group_state_changed)

181

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

192

self.entry_group_state_changed_match = (

193

self.group.connect_to_signal(

194

'StateChanged', self .entry_group_state_changed))

195

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

182

196

self.name, self.type)

183

197

self.group.AddService(

184

198

self.interface,

191

205

self.group.Commit()

192

206

def entry_group_state_changed(self, state, error):

193

207

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

194

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

208

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

195

209

196

210

if state == avahi.ENTRY_GROUP_ESTABLISHED:

197

logger.debug(u"Zeroconf service established.")

211

logger.debug("Zeroconf service established.")

198

212

elif state == avahi.ENTRY_GROUP_COLLISION:

199

logger.warning(u"Zeroconf service name collision.")

213

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

200

214

self.rename()

201

215

elif state == avahi.ENTRY_GROUP_FAILURE:

202

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

216

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

203

217

unicode(error))

204

raise AvahiGroupError(u"State changed: %s"

218

raise AvahiGroupError("State changed: %s"

205

219

% unicode(error))

206

220

def cleanup(self):

207

221

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

208

222

if self.group is not None:

209

self.group.Free()

223

try:

224

self.group.Free()

225

except (dbus.exceptions.UnknownMethodException,

226

dbus.exceptions.DBusException) as e:

227

pass

210

228

self.group = None

211

def server_state_changed(self, state):

229

self.remove()

230

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

212

231

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

213

if state == avahi.SERVER_COLLISION:

214

logger.error(u"Zeroconf server name collision")

215

self.remove()

232

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

233

bad_states = { avahi.SERVER_INVALID:

234

"Zeroconf server invalid",

235

avahi.SERVER_REGISTERING: None,

236

avahi.SERVER_COLLISION:

237

"Zeroconf server name collision",

238

avahi.SERVER_FAILURE:

239

"Zeroconf server failure" }

240

if state in bad_states:

241

if bad_states[state] is not None:

242

if error is None:

243

logger.error(bad_states[state])

244

else:

245

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

246

self.cleanup()

216

247

elif state == avahi.SERVER_RUNNING:

217

248

self.add()

249

else:

250

if error is None:

251

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

252

else:

253

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

218

254

def activate(self):

219

255

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

220

256

if self.server is None:

221

257

self.server = dbus.Interface(

222

258

self.bus.get_object(avahi.DBUS_NAME,

223

avahi.DBUS_PATH_SERVER),

259

avahi.DBUS_PATH_SERVER,

260

follow_name_owner_changes=True),

224

261

avahi.DBUS_INTERFACE_SERVER)

225

self.server.connect_to_signal(u"StateChanged",

262

self.server.connect_to_signal("StateChanged",

226

263

self.server_state_changed)

227

264

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

228

265

229

266

267

def _timedelta_to_milliseconds(td):

268

"Convert a datetime.timedelta() to milliseconds"

269

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

270

+ (td.seconds * 1000)

271

+ (td.microseconds // 1000))

272

230

273

class Client(object):

231

274

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

232

275

233

276

Attributes:

234

235

D-Bus identifiers

236

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

237

uniquely identify the client

238

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

239

host: string; available for use by the checker command

240

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

241

last_enabled: datetime.datetime(); (UTC)

242

enabled: bool()

243

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

244

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

245

until this client is invalid

246

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

247

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

277

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

278

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

279

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

248

280

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

249

281

to see if the client lives.

250

282

'None' if no process is running.

251

checker_initiator_tag: a gobject event source tag, or None

252

disable_initiator_tag: - '' -

253

checker_callback_tag: - '' -

254

checker_command: string; External command which is run to check if

255

client lives. %() expansions are done at

283

checker_callback_tag: a gobject event source tag, or None

284

checker_command: string; External command which is run to check

285

if client lives. %() expansions are done at

256

286

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

257

287

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

288

checker_initiator_tag: a gobject event source tag, or None

289

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

258

290

current_checker_command: string; current running checker_command

291

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

292

disable_initiator_tag: a gobject event source tag, or None

293

enabled: bool()

294

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

295

uniquely identify the client

296

host: string; available for use by the checker command

297

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

298

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

299

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

300

last_enabled: datetime.datetime(); (UTC)

301

302

D-Bus identifiers

303

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

304

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

305

until this client is disabled

306

extended_timeout: extra long timeout when password has been sent

307

runtime_expansions: Allowed attributes for runtime expansion.

308

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

309

disabled, or None

259

310

"""

260

311

261

@staticmethod

262

def _timedelta_to_milliseconds(td):

263

"Convert a datetime.timedelta() to milliseconds"

264

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

265

+ (td.seconds * 1000)

266

+ (td.microseconds // 1000))

312

runtime_expansions = ("approval_delay", "approval_duration",

313

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

314

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

315

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

267

316

268

317

def timeout_milliseconds(self):

269

318

"Return the 'timeout' attribute in milliseconds"

270

return self._timedelta_to_milliseconds(self.timeout)

319

return _timedelta_to_milliseconds(self.timeout)

320

321

def extended_timeout_milliseconds(self):

322

"Return the 'extended_timeout' attribute in milliseconds"

323

return _timedelta_to_milliseconds(self.extended_timeout)

271

324

272

325

def interval_milliseconds(self):

273

326

"Return the 'interval' attribute in milliseconds"

274

return self._timedelta_to_milliseconds(self.interval)

327

return _timedelta_to_milliseconds(self.interval)

328

329

def approval_delay_milliseconds(self):

330

return _timedelta_to_milliseconds(self.approval_delay)

275

331

276

332

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

277

333

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

280

336

self.name = name

281

337

if config is None:

282

338

config = {}

283

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

339

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

284

340

# Uppercase and remove spaces from fingerprint for later

285

341

# comparison purposes with return value from the fingerprint()

286

342

# function

287

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

288

.replace(u" ", u""))

289

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

290

if u"secret" in config:

291

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

292

elif u"secfile" in config:

293

with closing(open(os.path.expanduser

294

(os.path.expandvars

295

(config[u"secfile"])))) as secfile:

343

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

344

.replace(" ", ""))

345

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

346

if "secret" in config:

347

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

348

elif "secfile" in config:

349

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

350

(config["secfile"])),

351

"rb") as secfile:

296

352

self.secret = secfile.read()

297

353

else:

298

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

354

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

299

355

% self.name)

300

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

356

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

301

357

self.created = datetime.datetime.utcnow()

302

358

self.enabled = False

359

self.last_approval_request = None

303

360

self.last_enabled = None

304

361

self.last_checked_ok = None

305

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

306

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

362

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

363

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

364

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

307

365

self.disable_hook = disable_hook

308

366

self.checker = None

309

367

self.checker_initiator_tag = None

310

368

self.disable_initiator_tag = None

369

self.expires = None

311

370

self.checker_callback_tag = None

312

self.checker_command = config[u"checker"]

371

self.checker_command = config["checker"]

313

372

self.current_checker_command = None

314

373

self.last_connect = None

374

self._approved = None

375

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

376

True)

377

self.approvals_pending = 0

378

self.approval_delay = string_to_delta(

379

config["approval_delay"])

380

self.approval_duration = string_to_delta(

381

config["approval_duration"])

382

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

315

383

384

def send_changedstate(self):

385

self.changedstate.acquire()

386

self.changedstate.notify_all()

387

self.changedstate.release()

388

316

389

def enable(self):

317

390

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

318

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

391

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

319

392

# Already enabled

320

393

return

321

self.last_enabled = datetime.datetime.utcnow()

394

self.send_changedstate()

322

395

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

323

396

# and every interval from then on.

324

397

self.checker_initiator_tag = (gobject.timeout_add

325

398

(self.interval_milliseconds(),

326

399

self.start_checker))

327

# Also start a new checker *right now*.

328

self.start_checker()

329

400

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

401

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

330

402

self.disable_initiator_tag = (gobject.timeout_add

331

403

(self.timeout_milliseconds(),

332

404

self.disable))

333

405

self.enabled = True

406

self.last_enabled = datetime.datetime.utcnow()

407

# Also start a new checker *right now*.

408

self.start_checker()

334

409

335

def disable(self):

410

def disable(self, quiet=True):

336

411

"""Disable this client."""

337

412

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

338

413

return False

339

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

340

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

414

if not quiet:

415

self.send_changedstate()

416

if not quiet:

417

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

418

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

341

419

gobject.source_remove(self.disable_initiator_tag)

342

420

self.disable_initiator_tag = None

343

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

421

self.expires = None

422

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

344

423

gobject.source_remove(self.checker_initiator_tag)

345

424

self.checker_initiator_tag = None

346

425

self.stop_checker()

361

440

if os.WIFEXITED(condition):

362

441

exitstatus = os.WEXITSTATUS(condition)

363

442

if exitstatus == 0:

364

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

443

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

365

444

vars(self))

366

445

self.checked_ok()

367

446

else:

368

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

447

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

369

448

vars(self))

370

449

else:

371

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

450

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

372

451

vars(self))

373

452

374

def checked_ok(self):

453

def checked_ok(self, timeout=None):

375

454

"""Bump up the timeout for this client.

376

455

377

456

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

378

457

alive and well.

379

458

"""

459

if timeout is None:

460

timeout = self.timeout

380

461

self.last_checked_ok = datetime.datetime.utcnow()

381

462

gobject.source_remove(self.disable_initiator_tag)

463

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

382

464

self.disable_initiator_tag = (gobject.timeout_add

383

(self.timeout_milliseconds(),

465

(_timedelta_to_milliseconds(timeout),

384

466

self.disable))

385

467

468

def need_approval(self):

469

self.last_approval_request = datetime.datetime.utcnow()

470

386

471

def start_checker(self):

387

472

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

388

473

394

479

# client would inevitably timeout, since no checker would get

395

480

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

396

481

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

397

# than 'timeout' for the client to be declared invalid, which

398

# is as it should be.

482

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

483

# should be.

399

484

400

485

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

401

486

try:

402

487

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

403

except (AttributeError, OSError), error:

488

except (AttributeError, OSError) as error:

404

489

if (isinstance(error, OSError)

405

490

and error.errno != errno.ECHILD):

406

491

raise error

407

492

else:

408

493

if pid:

409

logger.warning(u"Checker was a zombie")

494

logger.warning("Checker was a zombie")

410

495

gobject.source_remove(self.checker_callback_tag)

411

496

self.checker_callback(pid, status,

412

497

self.current_checker_command)

417

502

command = self.checker_command % self.host

418

503

except TypeError:

419

504

# Escape attributes for the shell

420

escaped_attrs = dict((key,

421

re.escape(unicode(str(val),

422

errors=

423

u'replace')))

424

for key, val in

425

vars(self).iteritems())

505

escaped_attrs = dict(

506

(attr,

507

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

508

errors=

509

'replace')))

510

for attr in

511

self.runtime_expansions)

512

426

513

try:

427

514

command = self.checker_command % escaped_attrs

428

except TypeError, error:

429

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

430

u' %s', self.checker_command, error)

515

except TypeError as error:

516

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

517

' %s', self.checker_command, error)

431

518

return True # Try again later

432

519

self.current_checker_command = command

433

520

try:

434

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

521

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

435

522

command, self.name)

436

523

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

437

524

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

439

526

# always replaced by /dev/null.)

440

527

self.checker = subprocess.Popen(command,

441

528

close_fds=True,

442

shell=True, cwd=u"/")

529

shell=True, cwd="/")

443

530

self.checker_callback_tag = (gobject.child_watch_add

444

531

(self.checker.pid,

445

532

self.checker_callback,

450

537

if pid:

451

538

gobject.source_remove(self.checker_callback_tag)

452

539

self.checker_callback(pid, status, command)

453

except OSError, error:

454

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

540

except OSError as error:

541

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

455

542

error)

456

543

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

457

544

return True

461

548

if self.checker_callback_tag:

462

549

gobject.source_remove(self.checker_callback_tag)

463

550

self.checker_callback_tag = None

464

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

551

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

465

552

return

466

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

553

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

467

554

try:

468

555

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

469

#os.sleep(0.5)

556

#time.sleep(0.5)

470

557

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

471

558

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

472

except OSError, error:

559

except OSError as error:

473

560

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

474

561

raise

475

562

self.checker = None

476

477

def still_valid(self):

478

"""Has the timeout not yet passed for this client?"""

479

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

480

return False

481

now = datetime.datetime.utcnow()

482

if self.last_checked_ok is None:

483

return now < (self.created + self.timeout)

484

else:

485

return now < (self.last_checked_ok + self.timeout)

486

487

488

def dbus_service_property(dbus_interface, signature=u"v",

489

access=u"readwrite", byte_arrays=False):

563

564

565

def dbus_service_property(dbus_interface, signature="v",

566

access="readwrite", byte_arrays=False):

490

567

"""Decorators for marking methods of a DBusObjectWithProperties to

491

568

become properties on the D-Bus.

492

569

497

574

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

498

575

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

499

576

"""

577

# Encoding deeply encoded byte arrays is not supported yet by the

578

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

579

if byte_arrays and signature != "ay":

580

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

581

" signature %r" % signature)

500

582

def decorator(func):

501

583

func._dbus_is_property = True

502

584

func._dbus_interface = dbus_interface

503

585

func._dbus_signature = signature

504

586

func._dbus_access = access

505

587

func._dbus_name = func.__name__

506

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

588

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

507

589

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

508

func._dbus_get_args_options = {u'byte_arrays': byte_arrays }

590

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

509

591

return func

510

592

return decorator

511

593

531

613

532

614

class DBusObjectWithProperties(dbus.service.Object):

533

615

"""A D-Bus object with properties.

534

616

535

617

Classes inheriting from this can use the dbus_service_property

536

618

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

537

619

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

539

621

540

622

@staticmethod

541

623

def _is_dbus_property(obj):

542

return getattr(obj, u"_dbus_is_property", False)

624

return getattr(obj, "_dbus_is_property", False)

543

625

544

626

def _get_all_dbus_properties(self):

545

627

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

553

635

property with the specified name and interface.

554

636

"""

555

637

for name in (property_name,

556

property_name + u"_dbus_property"):

638

property_name + "_dbus_property"):

557

639

prop = getattr(self, name, None)

558

640

if (prop is None

559

641

or not self._is_dbus_property(prop)

563

645

continue

564

646

return prop

565

647

# No such property

566

raise DBusPropertyNotFound(self.dbus_object_path + u":"

567

+ interface_name + u"."

648

raise DBusPropertyNotFound(self.dbus_object_path + ":"

649

+ interface_name + "."

568

650

+ property_name)

569

651

570

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

571

out_signature=u"v")

652

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

653

out_signature="v")

572

654

def Get(self, interface_name, property_name):

573

655

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

574

656

"""

575

657

prop = self._get_dbus_property(interface_name, property_name)

576

if prop._dbus_access == u"write":

658

if prop._dbus_access == "write":

577

659

raise DBusPropertyAccessException(property_name)

578

660

value = prop()

579

if not hasattr(value, u"variant_level"):

661

if not hasattr(value, "variant_level"):

580

662

return value

581

663

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

582

664

583

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

665

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

584

666

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

585

667

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

586

668

"""

587

669

prop = self._get_dbus_property(interface_name, property_name)

588

if prop._dbus_access == u"read":

670

if prop._dbus_access == "read":

589

671

raise DBusPropertyAccessException(property_name)

590

if prop._dbus_get_args_options[u"byte_arrays"]:

672

if prop._dbus_get_args_options["byte_arrays"]:

673

# The byte_arrays option is not supported yet on

674

# signatures other than "ay".

675

if prop._dbus_signature != "ay":

676

raise ValueError

591

677

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

592

678

for byte in value))

593

679

prop(value)

594

680

595

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

596

out_signature=u"a{sv}")

681

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

682

out_signature="a{sv}")

597

683

def GetAll(self, interface_name):

598

684

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

599

685

standard.

600

686

601

687

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

602

688

"""

603

689

all = {}

607

693

# Interface non-empty but did not match

608

694

continue

609

695

# Ignore write-only properties

610

if prop._dbus_access == u"write":

696

if prop._dbus_access == "write":

611

697

continue

612

698

value = prop()

613

if not hasattr(value, u"variant_level"):

699

if not hasattr(value, "variant_level"):

614

700

all[name] = value

615

701

continue

616

702

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

617

703

value.variant_level+1)

618

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

704

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

619

705

620

706

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

621

out_signature=u"s",

707

out_signature="s",

622

708

path_keyword='object_path',

623

709

connection_keyword='connection')

624

710

def Introspect(self, object_path, connection):

625

711

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

626

712

"""

627

713

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

628

connection)

629

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

630

del xmlstring

631

def make_tag(document, name, prop):

632

e = document.createElement(u"property")

633

e.setAttribute(u"name", name)

634

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

635

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

636

return e

637

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

638

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

639

for name, prop

640

in self._get_all_dbus_properties()

641

if prop._dbus_interface

642

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

643

if_tag.appendChild(tag)

644

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

645

document.unlink()

714

connection)

715

try:

716

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

717

def make_tag(document, name, prop):

718

e = document.createElement("property")

719

e.setAttribute("name", name)

720

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

721

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

722

return e

723

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

724

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

725

for name, prop

726

in self._get_all_dbus_properties()

727

if prop._dbus_interface

728

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

729

if_tag.appendChild(tag)

730

# Add the names to the return values for the

731

# "org.freedesktop.DBus.Properties" methods

732

if (if_tag.getAttribute("name")

733

== "org.freedesktop.DBus.Properties"):

734

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

735

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

736

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

737

if (arg.getAttribute("direction")

738

== "out"):

739

arg.setAttribute("name", "value")

740

elif cn.getAttribute("name") == "GetAll":

741

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

742

if (arg.getAttribute("direction")

743

== "out"):

744

arg.setAttribute("name", "props")

745

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

746

document.unlink()

747

except (AttributeError, xml.dom.DOMException,

748

xml.parsers.expat.ExpatError) as error:

749

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

750

error)

646

751

return xmlstring

647

752

648

753

754

def datetime_to_dbus (dt, variant_level=0):

755

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

756

if dt is None:

757

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

758

return dbus.String(dt.isoformat(),

759

variant_level=variant_level)

760

761

649

762

class ClientDBus(Client, DBusObjectWithProperties):

650

763

"""A Client class using D-Bus

651

764

653

766

dbus_object_path: dbus.ObjectPath

654

767

bus: dbus.SystemBus()

655

768

"""

769

770

runtime_expansions = (Client.runtime_expansions

771

+ ("dbus_object_path",))

772

656

773

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

657

774

658

775

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

776

self._approvals_pending = 0

659

777

self.bus = bus

660

778

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

661

779

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

662

780

# the D-Bus

781

client_object_name = unicode(self.name).translate(

782

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

783

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

663

784

self.dbus_object_path = (dbus.ObjectPath

664

(u"/clients/"

665

+ self.name.replace(u".", u"_")))

785

("/clients/" + client_object_name))

666

786

DBusObjectWithProperties.__init__(self, self.bus,

667

787

self.dbus_object_path)

668

669

@staticmethod

670

def _datetime_to_dbus(dt, variant_level=0):

671

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

672

return dbus.String(dt.isoformat(),

673

variant_level=variant_level)

674

675

def enable(self):

676

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

677

r = Client.enable(self)

678

if oldstate != self.enabled:

679

# Emit D-Bus signals

680

self.PropertyChanged(dbus.String(u"enabled"),

681

dbus.Boolean(True, variant_level=1))

682

self.PropertyChanged(

683

dbus.String(u"last_enabled"),

684

self._datetime_to_dbus(self.last_enabled,

685

variant_level=1))

686

return r

687

688

def disable(self, signal = True):

689

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

690

r = Client.disable(self)

691

if signal and oldstate != self.enabled:

692

# Emit D-Bus signal

693

self.PropertyChanged(dbus.String(u"enabled"),

694

dbus.Boolean(False, variant_level=1))

695

return r

788

789

def notifychangeproperty(transform_func,

790

dbus_name, type_func=lambda x: x,

791

variant_level=1):

792

""" Modify a variable so that its a property that announce its

793

changes to DBus.

794

transform_fun: Function that takes a value and transform it to

795

DBus type.

796

dbus_name: DBus name of the variable

797

type_func: Function that transform the value before sending it

798

to DBus

799

variant_level: DBus variant level. default: 1

800

"""

801

real_value = [None,]

802

def setter(self, value):

803

old_value = real_value[0]

804

real_value[0] = value

805

if hasattr(self, "dbus_object_path"):

806

if type_func(old_value) != type_func(real_value[0]):

807

dbus_value = transform_func(type_func(real_value[0]),

808

variant_level)

809

self.PropertyChanged(dbus.String(dbus_name),

810

dbus_value)

811

812

return property(lambda self: real_value[0], setter)

813

814

815

expires = notifychangeproperty(datetime_to_dbus, "Expires")

816

approvals_pending = notifychangeproperty(dbus.Boolean,

817

"ApprovalPending",

818

type_func = bool)

819

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

820

last_enabled = notifychangeproperty(datetime_to_dbus,

821

"LastEnabled")

822

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

823

type_func = lambda checker: checker is not None)

824

last_checked_ok = notifychangeproperty(datetime_to_dbus,

825

"LastCheckedOK")

826

last_approval_request = notifychangeproperty(datetime_to_dbus,

827

"LastApprovalRequest")

828

approved_by_default = notifychangeproperty(dbus.Boolean,

829

"ApprovedByDefault")

830

approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",

831

type_func = _timedelta_to_milliseconds)

832

approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",

833

type_func = _timedelta_to_milliseconds)

834

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

835

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

836

type_func = _timedelta_to_milliseconds)

837

extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",

838

type_func = _timedelta_to_milliseconds)

839

interval = notifychangeproperty(dbus.UInt16, "Interval",

840

type_func = _timedelta_to_milliseconds)

841

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

842

843

del notifychangeproperty

696

844

697

845

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

698

846

try:

699

847

self.remove_from_connection()

700

848

except LookupError:

701

849

pass

702

if hasattr(DBusObjectWithProperties, u"__del__"):

850

if hasattr(DBusObjectWithProperties, "__del__"):

703

851

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

704

852

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

705

853

707

855

*args, **kwargs):

708

856

self.checker_callback_tag = None

709

857

self.checker = None

710

# Emit D-Bus signal

711

self.PropertyChanged(dbus.String(u"checker_running"),

712

dbus.Boolean(False, variant_level=1))

713

858

if os.WIFEXITED(condition):

714

859

exitstatus = os.WEXITSTATUS(condition)

715

860

# Emit D-Bus signal

725

870

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

726

871

*args, **kwargs)

727

872

728

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

729

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

730

# Emit D-Bus signal

731

self.PropertyChanged(

732

dbus.String(u"last_checked_ok"),

733

(self._datetime_to_dbus(self.last_checked_ok,

734

variant_level=1)))

735

return r

736

737

873

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

738

874

old_checker = self.checker

739

875

if self.checker is not None:

746

882

and old_checker_pid != self.checker.pid):

747

883

# Emit D-Bus signal

748

884

self.CheckerStarted(self.current_checker_command)

749

self.PropertyChanged(

750

dbus.String(u"checker_running"),

751

dbus.Boolean(True, variant_level=1))

752

return r

753

754

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

755

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

756

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

757

if (old_checker is not None

758

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

759

self.PropertyChanged(dbus.String(u"checker_running"),

760

dbus.Boolean(False, variant_level=1))

761

return r

762

763

## D-Bus methods & signals

764

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

765

766

# CheckedOK - method

767

@dbus.service.method(_interface)

768

def CheckedOK(self):

769

return self.checked_ok()

885

return r

886

887

def _reset_approved(self):

888

self._approved = None

889

return False

890

891

def approve(self, value=True):

892

self.send_changedstate()

893

self._approved = value

894

gobject.timeout_add(_timedelta_to_milliseconds

895

(self.approval_duration),

896

self._reset_approved)

897

898

899

## D-Bus methods, signals & properties

900

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

901

902

## Signals

770

903

771

904

# CheckerCompleted - signal

772

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

905

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

773

906

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

774

907

"D-Bus signal"

775

908

pass

776

909

777

910

# CheckerStarted - signal

778

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

911

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

779

912

def CheckerStarted(self, command):

780

913

"D-Bus signal"

781

914

pass

782

915

783

916

# PropertyChanged - signal

784

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

917

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

785

918

def PropertyChanged(self, property, value):

786

919

"D-Bus signal"

787

920

pass

788

921

789

# ReceivedSecret - signal

922

# GotSecret - signal

790

923

@dbus.service.signal(_interface)

791

def ReceivedSecret(self):

792

"D-Bus signal"

924

def GotSecret(self):

925

"""D-Bus signal

926

Is sent after a successful transfer of secret from the Mandos

927

server to mandos-client

928

"""

793

929

pass

794

930

795

931

# Rejected - signal

796

@dbus.service.signal(_interface)

797

def Rejected(self):

932

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

933

def Rejected(self, reason):

798

934

"D-Bus signal"

799

935

pass

800

936

937

# NeedApproval - signal

938

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

939

def NeedApproval(self, timeout, default):

940

"D-Bus signal"

941

return self.need_approval()

942

943

## Methods

944

945

# Approve - method

946

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

947

def Approve(self, value):

948

self.approve(value)

949

950

# CheckedOK - method

951

@dbus.service.method(_interface)

952

def CheckedOK(self):

953

self.checked_ok()

954

801

955

# Enable - method

802

956

@dbus.service.method(_interface)

803

957

def Enable(self):

821

975

def StopChecker(self):

822

976

self.stop_checker()

823

977

824

# name - property

825

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

826

def name_dbus_property(self):

978

## Properties

979

980

# ApprovalPending - property

981

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

982

def ApprovalPending_dbus_property(self):

983

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

984

985

# ApprovedByDefault - property

986

@dbus_service_property(_interface, signature="b",

987

access="readwrite")

988

def ApprovedByDefault_dbus_property(self, value=None):

989

if value is None: # get

990

return dbus.Boolean(self.approved_by_default)

991

self.approved_by_default = bool(value)

992

993

# ApprovalDelay - property

994

@dbus_service_property(_interface, signature="t",

995

access="readwrite")

996

def ApprovalDelay_dbus_property(self, value=None):

997

if value is None: # get

998

return dbus.UInt64(self.approval_delay_milliseconds())

999

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

1000

1001

# ApprovalDuration - property

1002

@dbus_service_property(_interface, signature="t",

1003

access="readwrite")

1004

def ApprovalDuration_dbus_property(self, value=None):

1005

if value is None: # get

1006

return dbus.UInt64(_timedelta_to_milliseconds(

1007

self.approval_duration))

1008

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

1009

1010

# Name - property

1011

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

1012

def Name_dbus_property(self):

827

1013

return dbus.String(self.name)

828

1014

829

# fingerprint - property

830

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

831

def fingerprint_dbus_property(self):

1015

# Fingerprint - property

1016

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

1017

def Fingerprint_dbus_property(self):

832

1018

return dbus.String(self.fingerprint)

833

1019

834

# host - property

835

@dbus_service_property(_interface, signature=u"s",

836

access=u"readwrite")

837

def host_dbus_property(self, value=None):

1020

# Host - property

1021

@dbus_service_property(_interface, signature="s",

1022

access="readwrite")

1023

def Host_dbus_property(self, value=None):

838

1024

if value is None: # get

839

1025

return dbus.String(self.host)

840

1026

self.host = value

841

# Emit D-Bus signal

842

self.PropertyChanged(dbus.String(u"host"),

843

dbus.String(value, variant_level=1))

844

845

# created - property

846

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

847

def created_dbus_property(self):

848

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

849

850

# last_enabled - property

851

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

852

def last_enabled_dbus_property(self):

853

if self.last_enabled is None:

854

return dbus.String(u"")

855

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

856

857

# enabled - property

858

@dbus_service_property(_interface, signature=u"b",

859

access=u"readwrite")

860

def enabled_dbus_property(self, value=None):

1027

1028

# Created - property

1029

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

1030

def Created_dbus_property(self):

1031

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

1032

1033

# LastEnabled - property

1034

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

1035

def LastEnabled_dbus_property(self):

1036

return datetime_to_dbus(self.last_enabled)

1037

1038

# Enabled - property

1039

@dbus_service_property(_interface, signature="b",

1040

access="readwrite")

1041

def Enabled_dbus_property(self, value=None):

861

1042

if value is None: # get

862

1043

return dbus.Boolean(self.enabled)

863

1044

if value:

865

1046

else:

866

1047

self.disable()

867

1048

868

# last_checked_ok - property

869

@dbus_service_property(_interface, signature=u"s",

870

access=u"readwrite")

871

def last_checked_ok_dbus_property(self, value=None):

1049

# LastCheckedOK - property

1050

@dbus_service_property(_interface, signature="s",

1051

access="readwrite")

1052

def LastCheckedOK_dbus_property(self, value=None):

872

1053

if value is not None:

873

1054

self.checked_ok()

874

1055

return

875

if self.last_checked_ok is None:

876

return dbus.String(u"")

877

return dbus.String(self._datetime_to_dbus(self

878

.last_checked_ok))

879

880

# timeout - property

881

@dbus_service_property(_interface, signature=u"t",

882

access=u"readwrite")

883

def timeout_dbus_property(self, value=None):

1056

return datetime_to_dbus(self.last_checked_ok)

1057

1058

# Expires - property

1059

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

1060

def Expires_dbus_property(self):

1061

return datetime_to_dbus(self.expires)

1062

1063

# LastApprovalRequest - property

1064

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

1065

def LastApprovalRequest_dbus_property(self):

1066

return datetime_to_dbus(self.last_approval_request)

1067

1068

# Timeout - property

1069

@dbus_service_property(_interface, signature="t",

1070

access="readwrite")

1071

def Timeout_dbus_property(self, value=None):

884

1072

if value is None: # get

885

1073

return dbus.UInt64(self.timeout_milliseconds())

886

1074

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

887

# Emit D-Bus signal

888

self.PropertyChanged(dbus.String(u"timeout"),

889

dbus.UInt64(value, variant_level=1))

890

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

1075

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

891

1076

return

892

1077

# Reschedule timeout

893

1078

gobject.source_remove(self.disable_initiator_tag)

894

1079

self.disable_initiator_tag = None

1080

self.expires = None

895

1081

time_to_die = (self.

896

1082

_timedelta_to_milliseconds((self

897

1083

.last_checked_ok

902

1088

# The timeout has passed

903

1089

self.disable()

904

1090

else:

1091

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

1092

+ datetime.timedelta(milliseconds = time_to_die))

905

1093

self.disable_initiator_tag = (gobject.timeout_add

906

1094

(time_to_die, self.disable))

907

1095

908

# interval - property

909

@dbus_service_property(_interface, signature=u"t",

910

access=u"readwrite")

911

def interval_dbus_property(self, value=None):

1096

# ExtendedTimeout - property

1097

@dbus_service_property(_interface, signature="t",

1098

access="readwrite")

1099

def ExtendedTimeout_dbus_property(self, value=None):

1100

if value is None: # get

1101

return dbus.UInt64(self.extended_timeout_milliseconds())

1102

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

1103

1104

# Interval - property

1105

@dbus_service_property(_interface, signature="t",

1106

access="readwrite")

1107

def Interval_dbus_property(self, value=None):

912

1108

if value is None: # get

913

1109

return dbus.UInt64(self.interval_milliseconds())

914

1110

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

915

# Emit D-Bus signal

916

self.PropertyChanged(dbus.String(u"interval"),

917

dbus.UInt64(value, variant_level=1))

918

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

1111

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

919

1112

return

920

1113

# Reschedule checker run

921

1114

gobject.source_remove(self.checker_initiator_tag)

922

1115

self.checker_initiator_tag = (gobject.timeout_add

923

1116

(value, self.start_checker))

924

1117

self.start_checker() # Start one now, too

925

926

# checker - property

927

@dbus_service_property(_interface, signature=u"s",

928

access=u"readwrite")

929

def checker_dbus_property(self, value=None):

1118

1119

# Checker - property

1120

@dbus_service_property(_interface, signature="s",

1121

access="readwrite")

1122

def Checker_dbus_property(self, value=None):

930

1123

if value is None: # get

931

1124

return dbus.String(self.checker_command)

932

1125

self.checker_command = value

933

# Emit D-Bus signal

934

self.PropertyChanged(dbus.String(u"checker"),

935

dbus.String(self.checker_command,

936

variant_level=1))

937

1126

938

# checker_running - property

939

@dbus_service_property(_interface, signature=u"b",

940

access=u"readwrite")

941

def checker_running_dbus_property(self, value=None):

1127

# CheckerRunning - property

1128

@dbus_service_property(_interface, signature="b",

1129

access="readwrite")

1130

def CheckerRunning_dbus_property(self, value=None):

942

1131

if value is None: # get

943

1132

return dbus.Boolean(self.checker is not None)

944

1133

if value:

946

1135

else:

947

1136

self.stop_checker()

948

1137

949

# object_path - property

950

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

951

def object_path_dbus_property(self):

1138

# ObjectPath - property

1139

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

1140

def ObjectPath_dbus_property(self):

952

1141

return self.dbus_object_path # is already a dbus.ObjectPath

953

1142

954

# secret = property

955

@dbus_service_property(_interface, signature=u"ay",

956

access=u"write", byte_arrays=True)

957

def secret_dbus_property(self, value):

1143

# Secret = property

1144

@dbus_service_property(_interface, signature="ay",

1145

access="write", byte_arrays=True)

1146

def Secret_dbus_property(self, value):

958

1147

self.secret = str(value)

959

1148

960

1149

del _interface

961

1150

962

1151

1152

class ProxyClient(object):

1153

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

1154

self._pipe = child_pipe

1155

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

1156

if not self._pipe.recv():

1157

raise KeyError()

1158

1159

def __getattribute__(self, name):

1160

if(name == '_pipe'):

1161

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

1162

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

1163

data = self._pipe.recv()

1164

if data[0] == 'data':

1165

return data[1]

1166

if data[0] == 'function':

1167

def func(*args, **kwargs):

1168

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

1169

return self._pipe.recv()[1]

1170

return func

1171

1172

def __setattr__(self, name, value):

1173

if(name == '_pipe'):

1174

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

1175

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

1176

1177

963

1178

class ClientHandler(socketserver.BaseRequestHandler, object):

964

1179

"""A class to handle client connections.

965

1180

967

1182

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

968

1183

969

1184

def handle(self):

970

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

971

unicode(self.client_address))

972

logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])

973

# Open IPC pipe to parent process

974

with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:

1185

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

1186

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

1187

unicode(self.client_address))

1188

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

1189

self.server.child_pipe.fileno())

1190

975

1191

session = (gnutls.connection

976

1192

.ClientSession(self.request,

977

1193

gnutls.connection

978

1194

.X509Credentials()))

979

1195

980

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

981

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

982

try:

983

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

984

raise RuntimeError

985

except (ValueError, IndexError, RuntimeError), error:

986

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

987

return

988

989

1196

# Note: gnutls.connection.X509Credentials is really a

990

1197

# generic GnuTLS certificate credentials object so long as

991

1198

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

992

1199

# here despite using OpenPGP certificates.

993

1200

994

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

995

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

996

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

997

# u"+DHE-DSS"))

1201

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

1202

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

1203

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

1204

# "+DHE-DSS"))

998

1205

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

999

1206

priority = self.server.gnutls_priority

1000

1207

if priority is None:

1001

priority = u"NORMAL"

1208

priority = "NORMAL"

1002

1209

(gnutls.library.functions

1003

1210

.gnutls_priority_set_direct(session._c_object,

1004

1211

priority, None))

1005

1212

1213

# Start communication using the Mandos protocol

1214

# Get protocol number

1215

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

1216

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

1217

try:

1218

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

1219

raise RuntimeError

1220

except (ValueError, IndexError, RuntimeError) as error:

1221

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

1222

return

1223

1224

# Start GnuTLS connection

1006

1225

try:

1007

1226

session.handshake()

1008

except gnutls.errors.GNUTLSError, error:

1009

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

1227

except gnutls.errors.GNUTLSError as error:

1228

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

1010

1229

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

1011

1230

# established. Just abandon the request.

1012

1231

return

1013

logger.debug(u"Handshake succeeded")

1232

logger.debug("Handshake succeeded")

1233

1234

approval_required = False

1014

1235

try:

1015

fpr = self.fingerprint(self.peer_certificate(session))

1016

except (TypeError, gnutls.errors.GNUTLSError), error:

1017

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

1018

session.bye()

1019

return

1020

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

1236

try:

1237

fpr = self.fingerprint(self.peer_certificate

1238

(session))

1239

except (TypeError,

1240

gnutls.errors.GNUTLSError) as error:

1241

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

1242

return

1243

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

1244

1245

try:

1246

client = ProxyClient(child_pipe, fpr,

1247

self.client_address)

1248

except KeyError:

1249

return

1250

1251

if client.approval_delay:

1252

delay = client.approval_delay

1253

client.approvals_pending += 1

1254

approval_required = True

1255

1256

while True:

1257

if not client.enabled:

1258

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

1259

client.name)

1260

if self.server.use_dbus:

1261

# Emit D-Bus signal

1262

client.Rejected("Disabled")

1263

return

1264

1265

if client._approved or not client.approval_delay:

1266

#We are approved or approval is disabled

1267

break

1268

elif client._approved is None:

1269

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

1270

client.name)

1271

if self.server.use_dbus:

1272

# Emit D-Bus signal

1273

client.NeedApproval(

1274

client.approval_delay_milliseconds(),

1275

client.approved_by_default)

1276

else:

1277

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

1278

client.name)

1279

if self.server.use_dbus:

1280

# Emit D-Bus signal

1281

client.Rejected("Denied")

1282

return

1283

1284

#wait until timeout or approved

1285

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

1286

time = datetime.datetime.now()

1287

client.changedstate.acquire()

1288

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

1289

client.changedstate.release()

1290

time2 = datetime.datetime.now()

1291

if (time2 - time) >= delay:

1292

if not client.approved_by_default:

1293

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

1294

" waiting for approval",

1295

client.name)

1296

if self.server.use_dbus:

1297

# Emit D-Bus signal

1298

client.Rejected("Approval timed out")

1299

return

1300

else:

1301

break

1302

else:

1303

delay -= time2 - time

1304

1305

sent_size = 0

1306

while sent_size < len(client.secret):

1307

try:

1308

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

1309

except gnutls.errors.GNUTLSError as error:

1310

logger.warning("gnutls send failed")

1311

return

1312

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

1313

sent, len(client.secret)

1314

- (sent_size + sent))

1315

sent_size += sent

1316

1317

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

1318

# bump the timeout as if seen

1319

client.checked_ok(client.extended_timeout)

1320

if self.server.use_dbus:

1321

# Emit D-Bus signal

1322

client.GotSecret()

1021

1323

1022

for c in self.server.clients:

1023

if c.fingerprint == fpr:

1024

client = c

1025

break

1026

else:

1027

ipc.write(u"NOTFOUND %s %s\n"

1028

% (fpr, unicode(self.client_address)))

1029

session.bye()

1030

return

1031

# Have to check if client.still_valid(), since it is

1032

# possible that the client timed out while establishing

1033

# the GnuTLS session.

1034

if not client.still_valid():

1035

ipc.write(u"INVALID %s\n" % client.name)

1036

session.bye()

1037

return

1038

ipc.write(u"SENDING %s\n" % client.name)

1039

sent_size = 0

1040

while sent_size < len(client.secret):

1041

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

1042

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

1043

sent, len(client.secret)

1044

- (sent_size + sent))

1045

sent_size += sent

1046

session.bye()

1324

finally:

1325

if approval_required:

1326

client.approvals_pending -= 1

1327

try:

1328

session.bye()

1329

except gnutls.errors.GNUTLSError as error:

1330

logger.warning("GnuTLS bye failed")

1047

1331

1048

1332

@staticmethod

1049

1333

def peer_certificate(session):

1059

1343

.gnutls_certificate_get_peers

1060

1344

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

1061

1345

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

1062

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

1063

u" certificate")

1346

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

1347

" certificate")

1064

1348

if list_size.value == 0:

1065

1349

return None

1066

1350

cert = cert_list[0]

1092

1376

if crtverify.value != 0:

1093

1377

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1094

1378

raise (gnutls.errors.CertificateSecurityError

1095

(u"Verify failed"))

1379

("Verify failed"))

1096

1380

# New buffer for the fingerprint

1097

1381

buf = ctypes.create_string_buffer(20)

1098

1382

buf_len = ctypes.c_size_t()

1105

1389

# Convert the buffer to a Python bytestring

1106

1390

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

1107

1391

# Convert the bytestring to hexadecimal notation

1108

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

1392

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

1109

1393

return hex_fpr

1110

1394

1111

1395

1112

class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):

1113

"""Like socketserver.ForkingMixIn, but also pass a pipe."""

1396

class MultiprocessingMixIn(object):

1397

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

1398

def sub_process_main(self, request, address):

1399

try:

1400

self.finish_request(request, address)

1401

except:

1402

self.handle_error(request, address)

1403

self.close_request(request)

1404

1405

def process_request(self, request, address):

1406

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

1407

multiprocessing.Process(target = self.sub_process_main,

1408

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

1409

1410

1411

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1412

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

1114

1413

def process_request(self, request, client_address):

1115

1414

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

1116

1415

1117

1416

This function creates a new pipe in self.pipe

1118

1417

"""

1119

self.pipe = os.pipe()

1120

super(ForkingMixInWithPipe,

1418

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1419

1420

super(MultiprocessingMixInWithPipe,

1121

1421

self).process_request(request, client_address)

1122

os.close(self.pipe[1]) # close write end

1123

self.add_pipe(self.pipe[0])

1124

def add_pipe(self, pipe):

1422

self.child_pipe.close()

1423

self.add_pipe(parent_pipe)

1424

1425

def add_pipe(self, parent_pipe):

1125

1426

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

1126

os.close(pipe)

1127

1128

1129

class IPv6_TCPServer(ForkingMixInWithPipe,

1427

raise NotImplementedError

1428

1429

1430

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1130

1431

socketserver.TCPServer, object):

1131

1432

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

1132

1433

1148

1449

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

1149

1450

if self.interface is not None:

1150

1451

if SO_BINDTODEVICE is None:

1151

logger.error(u"SO_BINDTODEVICE does not exist;"

1152

u" cannot bind to interface %s",

1452

logger.error("SO_BINDTODEVICE does not exist;"

1453

" cannot bind to interface %s",

1153

1454

self.interface)

1154

1455

else:

1155

1456

try:

1156

1457

self.socket.setsockopt(socket.SOL_SOCKET,

1157

1458

SO_BINDTODEVICE,

1158

1459

str(self.interface

1159

+ u'\0'))

1160

except socket.error, error:

1460

+ '\0'))

1461

except socket.error as error:

1161

1462

if error[0] == errno.EPERM:

1162

logger.error(u"No permission to"

1163

u" bind to interface %s",

1463

logger.error("No permission to"

1464

" bind to interface %s",

1164

1465

self.interface)

1165

1466

elif error[0] == errno.ENOPROTOOPT:

1166

logger.error(u"SO_BINDTODEVICE not available;"

1167

u" cannot bind to interface %s",

1467

logger.error("SO_BINDTODEVICE not available;"

1468

" cannot bind to interface %s",

1168

1469

self.interface)

1169

1470

else:

1170

1471

raise

1172

1473

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

1173

1474

if not self.server_address[0]:

1174

1475

if self.address_family == socket.AF_INET6:

1175

any_address = u"::" # in6addr_any

1476

any_address = "::" # in6addr_any

1176

1477

else:

1177

1478

any_address = socket.INADDR_ANY

1178

1479

self.server_address = (any_address,

1217

1518

return socketserver.TCPServer.server_activate(self)

1218

1519

def enable(self):

1219

1520

self.enabled = True

1220

def add_pipe(self, pipe):

1521

def add_pipe(self, parent_pipe):

1221

1522

# Call "handle_ipc" for both data and EOF events

1222

gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,

1223

self.handle_ipc)

1224

def handle_ipc(self, source, condition, file_objects={}):

1523

gobject.io_add_watch(parent_pipe.fileno(),

1524

gobject.IO_IN | gobject.IO_HUP,

1525

functools.partial(self.handle_ipc,

1526

parent_pipe = parent_pipe))

1527

1528

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

1529

client_object=None):

1225

1530

condition_names = {

1226

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

1227

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

1531

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

1532

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

1228

1533

# blocking).

1229

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

1230

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

1231

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

1534

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

1535

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

1536

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

1232

1537

# broken, usually for pipes and

1233

1538

# sockets).

1234

1539

}

1236

1541

for cond, name in

1237

1542

condition_names.iteritems()

1238

1543

if cond & condition)

1239

logger.debug(u"Handling IPC: FD = %d, condition = %s", source,

1240

conditions_string)

1241

1242

# Turn the pipe file descriptor into a Python file object

1243

if source not in file_objects:

1244

file_objects[source] = os.fdopen(source, u"r", 1)

1245

1246

# Read a line from the file object

1247

cmdline = file_objects[source].readline()

1248

if not cmdline: # Empty line means end of file

1249

# close the IPC pipe

1250

file_objects[source].close()

1251

del file_objects[source]

1252

1253

# Stop calling this function

1254

return False

1255

1256

logger.debug(u"IPC command: %r", cmdline)

1257

1258

# Parse and act on command

1259

cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)

1260

1261

if cmd == u"NOTFOUND":

1262

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

1263

args)

1264

if self.use_dbus:

1265

# Emit D-Bus signal

1266

mandos_dbus_service.ClientNotFound(args)

1267

elif cmd == u"INVALID":

1268

for client in self.clients:

1269

if client.name == args:

1270

logger.warning(u"Client %s is invalid", args)

1271

if self.use_dbus:

1272

# Emit D-Bus signal

1273

client.Rejected()

1274

break

1275

else:

1276

logger.error(u"Unknown client %s is invalid", args)

1277

elif cmd == u"SENDING":

1278

for client in self.clients:

1279

if client.name == args:

1280

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

1281

client.checked_ok()

1282

if self.use_dbus:

1283

# Emit D-Bus signal

1284

client.ReceivedSecret()

1285

break

1286

else:

1287

logger.error(u"Sending secret to unknown client %s",

1288

args)

1289

else:

1290

logger.error(u"Unknown IPC command: %r", cmdline)

1291

1292

# Keep calling this function

1544

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

1545

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

1546

return False

1547

1548

# Read a request from the child

1549

request = parent_pipe.recv()

1550

command = request[0]

1551

1552

if command == 'init':

1553

fpr = request[1]

1554

address = request[2]

1555

1556

for c in self.clients:

1557

if c.fingerprint == fpr:

1558

client = c

1559

break

1560

else:

1561

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

1562

"dress: %s", fpr, address)

1563

if self.use_dbus:

1564

# Emit D-Bus signal

1565

mandos_dbus_service.ClientNotFound(fpr, address[0])

1566

parent_pipe.send(False)

1567

return False

1568

1569

gobject.io_add_watch(parent_pipe.fileno(),

1570

gobject.IO_IN | gobject.IO_HUP,

1571

functools.partial(self.handle_ipc,

1572

parent_pipe = parent_pipe,

1573

client_object = client))

1574

parent_pipe.send(True)

1575

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

1576

return False

1577

if command == 'funcall':

1578

funcname = request[1]

1579

args = request[2]

1580

kwargs = request[3]

1581

1582

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

1583

1584

if command == 'getattr':

1585

attrname = request[1]

1586

if callable(client_object.__getattribute__(attrname)):

1587

parent_pipe.send(('function',))

1588

else:

1589

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

1590

1591

if command == 'setattr':

1592

attrname = request[1]

1593

value = request[2]

1594

setattr(client_object, attrname, value)

1595

1293

1596

return True

1294

1597

1295

1598

1296

1599

def string_to_delta(interval):

1297

1600

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

1298

1601

1299

>>> string_to_delta(u'7d')

1602

>>> string_to_delta('7d')

1300

1603

datetime.timedelta(7)

1301

>>> string_to_delta(u'60s')

1604

>>> string_to_delta('60s')

1302

1605

datetime.timedelta(0, 60)

1303

>>> string_to_delta(u'60m')

1606

>>> string_to_delta('60m')

1304

1607

datetime.timedelta(0, 3600)

1305

>>> string_to_delta(u'24h')

1608

>>> string_to_delta('24h')

1306

1609

datetime.timedelta(1)

1307

>>> string_to_delta(u'1w')

1610

>>> string_to_delta('1w')

1308

1611

datetime.timedelta(7)

1309

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

1612

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

1310

1613

datetime.timedelta(0, 330)

1311

1614

"""

1312

1615

timevalue = datetime.timedelta(0)

1314

1617

try:

1315

1618

suffix = unicode(s[-1])

1316

1619

value = int(s[:-1])

1317

if suffix == u"d":

1620

if suffix == "d":

1318

1621

delta = datetime.timedelta(value)

1319

elif suffix == u"s":

1622

elif suffix == "s":

1320

1623

delta = datetime.timedelta(0, value)

1321

elif suffix == u"m":

1624

elif suffix == "m":

1322

1625

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

1323

elif suffix == u"h":

1626

elif suffix == "h":

1324

1627

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

1325

elif suffix == u"w":

1628

elif suffix == "w":

1326

1629

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

1327

1630

else:

1328

raise ValueError

1329

except (ValueError, IndexError):

1330

raise ValueError

1631

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

1632

except (ValueError, IndexError) as e:

1633

raise ValueError(*(e.args))

1331

1634

timevalue += delta

1332

1635

return timevalue

1333

1636

1339

1642

global if_nametoindex

1340

1643

try:

1341

1644

if_nametoindex = (ctypes.cdll.LoadLibrary

1342

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

1645

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

1343

1646

.if_nametoindex)

1344

1647

except (OSError, AttributeError):

1345

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

1648

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

1346

1649

def if_nametoindex(interface):

1347

1650

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

1348

1651

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

1349

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

1652

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

1350

1653

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1351

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

1654

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

1352

1655

interface))

1353

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

1656

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

1354

1657

ifreq[16:20])[0]

1355

1658

return interface_index

1356

1659

return if_nametoindex(interface)

1364

1667

sys.exit()

1365

1668

os.setsid()

1366

1669

if not nochdir:

1367

os.chdir(u"/")

1670

os.chdir("/")

1368

1671

if os.fork():

1369

1672

sys.exit()

1370

1673

if not noclose:

1372

1675

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

1373

1676

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

1374

1677

raise OSError(errno.ENODEV,

1375

u"/dev/null not a character device")

1678

"%s not a character device"

1679

% os.path.devnull)

1376

1680

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

1377

1681

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

1378

1682

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

1385

1689

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

1386

1690

# Parsing of options, both command line and config file

1387

1691

1388

parser = optparse.OptionParser(version = "%%prog %s" % version)

1389

parser.add_option("-i", u"--interface", type=u"string",

1390

metavar="IF", help=u"Bind to interface IF")

1391

parser.add_option("-a", u"--address", type=u"string",

1392

help=u"Address to listen for requests on")

1393

parser.add_option("-p", u"--port", type=u"int",

1394

help=u"Port number to receive requests on")

1395

parser.add_option("--check", action=u"store_true",

1396

help=u"Run self-test")

1397

parser.add_option("--debug", action=u"store_true",

1398

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

1399

u" terminal")

1400

parser.add_option("--priority", type=u"string", help=u"GnuTLS"

1401

u" priority string (see GnuTLS documentation)")

1402

parser.add_option("--servicename", type=u"string",

1403

metavar=u"NAME", help=u"Zeroconf service name")

1404

parser.add_option("--configdir", type=u"string",

1405

default=u"/etc/mandos", metavar=u"DIR",

1406

help=u"Directory to search for configuration"

1407

u" files")

1408

parser.add_option("--no-dbus", action=u"store_false",

1409

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

1410

u" system bus interface")

1411

parser.add_option("--no-ipv6", action=u"store_false",

1412

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

1413

options = parser.parse_args()[0]

1692

parser = argparse.ArgumentParser()

1693

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

1694

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

1695

help="show version number and exit")

1696

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

1697

help="Bind to interface IF")

1698

parser.add_argument("-a", "--address",

1699

help="Address to listen for requests on")

1700

parser.add_argument("-p", "--port", type=int,

1701

help="Port number to receive requests on")

1702

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

1703

help="Run self-test")

1704

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

1705

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

1706

" to terminal")

1707

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

1708

help="Debug level for stdout output")

1709

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

1710

" priority string (see GnuTLS documentation)")

1711

parser.add_argument("--servicename",

1712

metavar="NAME", help="Zeroconf service name")

1713

parser.add_argument("--configdir",

1714

default="/etc/mandos", metavar="DIR",

1715

help="Directory to search for configuration"

1716

" files")

1717

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

1718

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

1719

" system bus interface")

1720

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

1721

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

1722

options = parser.parse_args()

1414

1723

1415

1724

if options.check:

1416

1725

import doctest

1418

1727

sys.exit()

1419

1728

1420

1729

# Default values for config file for server-global settings

1421

server_defaults = { u"interface": u"",

1422

u"address": u"",

1423

u"port": u"",

1424

u"debug": u"False",

1425

u"priority":

1426

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

1427

u"servicename": u"Mandos",

1428

u"use_dbus": u"True",

1429

u"use_ipv6": u"True",

1730

server_defaults = { "interface": "",

1731

"address": "",

1732

"port": "",

1733

"debug": "False",

1734

"priority":

1735

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

1736

"servicename": "Mandos",

1737

"use_dbus": "True",

1738

"use_ipv6": "True",

1739

"debuglevel": "",

1430

1740

}

1431

1741

1432

1742

# Parse config file for server-global settings

1433

1743

server_config = configparser.SafeConfigParser(server_defaults)

1434

1744

del server_defaults

1435

1745

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

1436

u"mandos.conf"))

1746

"mandos.conf"))

1437

1747

# Convert the SafeConfigParser object to a dict

1438

1748

server_settings = server_config.defaults()

1439

1749

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

1440

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

1441

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

1750

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

1751

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

1442

1752

option)

1443

1753

if server_settings["port"]:

1444

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

1445

u"port")

1754

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

1755

"port")

1446

1756

del server_config

1447

1757

1448

1758

# Override the settings from the config file with command line

1449

1759

# options, if set.

1450

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

1451

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

1452

u"use_dbus", u"use_ipv6"):

1760

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

1761

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

1762

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

1453

1763

value = getattr(options, option)

1454

1764

if value is not None:

1455

1765

server_settings[option] = value

1463

1773

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

1464

1774

1465

1775

# For convenience

1466

debug = server_settings[u"debug"]

1467

use_dbus = server_settings[u"use_dbus"]

1468

use_ipv6 = server_settings[u"use_ipv6"]

1469

1470

if not debug:

1471

syslogger.setLevel(logging.WARNING)

1472

console.setLevel(logging.WARNING)

1473

1474

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

1776

debug = server_settings["debug"]

1777

debuglevel = server_settings["debuglevel"]

1778

use_dbus = server_settings["use_dbus"]

1779

use_ipv6 = server_settings["use_ipv6"]

1780

1781

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

1475

1782

syslogger.setFormatter(logging.Formatter

1476

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

1477

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

1478

% server_settings[u"servicename"]))

1783

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

1784

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

1785

% server_settings["servicename"]))

1479

1786

1480

1787

# Parse config file with clients

1481

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

1482

u"interval": u"5m",

1483

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

1484

u"host": u"",

1788

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

1789

"extended_timeout": "15m",

1790

"interval": "2m",

1791

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

1792

"host": "",

1793

"approval_delay": "0s",

1794

"approval_duration": "1s",

1485

1795

}

1486

1796

client_config = configparser.SafeConfigParser(client_defaults)

1487

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

1488

u"clients.conf"))

1797

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

1798

"clients.conf"))

1489

1799

1490

1800

global mandos_dbus_service

1491

1801

mandos_dbus_service = None

1492

1802

1493

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

1494

server_settings[u"port"]),

1803

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

1804

server_settings["port"]),

1495

1805

ClientHandler,

1496

interface=server_settings[u"interface"],

1806

interface=(server_settings["interface"]

1807

or None),

1497

1808

use_ipv6=use_ipv6,

1498

1809

gnutls_priority=

1499

server_settings[u"priority"],

1810

server_settings["priority"],

1500

1811

use_dbus=use_dbus)

1501

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

1502

try:

1503

pidfile = open(pidfilename, u"w")

1504

except IOError:

1505

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

1812

if not debug:

1813

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

1814

try:

1815

pidfile = open(pidfilename, "w")

1816

except IOError:

1817

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

1506

1818

1507

1819

try:

1508

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

1509

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

1820

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

1821

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

1510

1822

except KeyError:

1511

1823

try:

1512

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

1513

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

1824

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

1825

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

1514

1826

except KeyError:

1515

1827

try:

1516

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

1517

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

1828

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

1829

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

1518

1830

except KeyError:

1519

1831

uid = 65534

1520

1832

gid = 65534

1521

1833

try:

1522

1834

os.setgid(gid)

1523

1835

os.setuid(uid)

1524

except OSError, error:

1836

except OSError as error:

1525

1837

if error[0] != errno.EPERM:

1526

1838

raise error

1527

1839

1528

# Enable all possible GnuTLS debugging

1840

if not debug and not debuglevel:

1841

syslogger.setLevel(logging.WARNING)

1842

console.setLevel(logging.WARNING)

1843

if debuglevel:

1844

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

1845

syslogger.setLevel(level)

1846

console.setLevel(level)

1847

1529

1848

if debug:

1849

# Enable all possible GnuTLS debugging

1850

1530

1851

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

1531

1852

# - GnuTLS manual

1532

1853

gnutls.library.functions.gnutls_global_set_log_level(11)

1533

1854

1534

1855

@gnutls.library.types.gnutls_log_func

1535

1856

def debug_gnutls(level, string):

1536

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

1857

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

1537

1858

1538

1859

(gnutls.library.functions

1539

1860

.gnutls_global_set_log_function(debug_gnutls))

1861

1862

# Redirect stdin so all checkers get /dev/null

1863

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

1864

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

1865

if null > 2:

1866

os.close(null)

1867

else:

1868

# No console logging

1869

logger.removeHandler(console)

1870

1871

# Need to fork before connecting to D-Bus

1872

if not debug:

1873

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

1874

daemon()

1540

1875

1541

1876

global main_loop

1542

1877

# From the Avahi example code

1545

1880

bus = dbus.SystemBus()

1546

1881

# End of Avahi example code

1547

1882

if use_dbus:

1548

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

1883

try:

1884

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

1885

bus, do_not_queue=True)

1886

except dbus.exceptions.NameExistsException as e:

1887

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

1888

use_dbus = False

1889

server_settings["use_dbus"] = False

1890

tcp_server.use_dbus = False

1549

1891

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1550

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

1551

servicetype = u"_mandos._tcp",

1892

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

1893

servicetype = "_mandos._tcp",

1552

1894

protocol = protocol, bus = bus)

1553

1895

if server_settings["interface"]:

1554

1896

service.interface = (if_nametoindex

1555

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

1897

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

1898

1899

global multiprocessing_manager

1900

multiprocessing_manager = multiprocessing.Manager()

1556

1901

1557

1902

client_class = Client

1558

1903

if use_dbus:

1559

1904

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

1905

def client_config_items(config, section):

1906

special_settings = {

1907

"approved_by_default":

1908

lambda: config.getboolean(section,

1909

"approved_by_default"),

1910

}

1911

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

1912

try:

1913

yield (name, special_settings[name]())

1914

except KeyError:

1915

yield (name, value)

1916

1560

1917

tcp_server.clients.update(set(

1561

1918

client_class(name = section,

1562

config= dict(client_config.items(section)))

1919

config= dict(client_config_items(

1920

client_config, section)))

1563

1921

for section in client_config.sections()))

1564

1922

if not tcp_server.clients:

1565

logger.warning(u"No clients defined")

1566

1567

if debug:

1568

# Redirect stdin so all checkers get /dev/null

1569

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

1570

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

1571

if null > 2:

1572

os.close(null)

1573

else:

1574

# No console logging

1575

logger.removeHandler(console)

1576

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

1577

daemon()

1578

1579

try:

1580

with closing(pidfile):

1581

pid = os.getpid()

1582

pidfile.write(str(pid) + "\n")

1583

del pidfile

1584

except IOError:

1585

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

1586

pidfilename, pid)

1587

except NameError:

1588

# "pidfile" was never created

1589

pass

1590

del pidfilename

1591

1592

def cleanup():

1593

"Cleanup function; run on exit"

1594

service.cleanup()

1923

logger.warning("No clients defined")

1595

1924

1596

while tcp_server.clients:

1597

client = tcp_server.clients.pop()

1598

client.disable_hook = None

1599

client.disable()

1600

1601

atexit.register(cleanup)

1602

1603

1925

if not debug:

1926

try:

1927

with pidfile:

1928

pid = os.getpid()

1929

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

1930

del pidfile

1931

except IOError:

1932

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

1933

pidfilename, pid)

1934

except NameError:

1935

# "pidfile" was never created

1936

pass

1937

del pidfilename

1938

1604

1939

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

1940

1605

1941

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

1606

1942

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

1607

1943

1609

1945

class MandosDBusService(dbus.service.Object):

1610

1946

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

1611

1947

def __init__(self):

1612

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

1613

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

1614

1615

@dbus.service.signal(_interface, signature=u"oa{sv}")

1616

def ClientAdded(self, objpath, properties):

1617

"D-Bus signal"

1618

pass

1619

1620

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

1621

def ClientNotFound(self, fingerprint):

1622

"D-Bus signal"

1623

pass

1624

1625

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

1948

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

1949

_interface = "se.bsnet.fukt.Mandos"

1950

1951

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

1952

def ClientAdded(self, objpath):

1953

"D-Bus signal"

1954

pass

1955

1956

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

1957

def ClientNotFound(self, fingerprint, address):

1958

"D-Bus signal"

1959

pass

1960

1961

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

1626

1962

def ClientRemoved(self, objpath, name):

1627

1963

"D-Bus signal"

1628

1964

pass

1629

1965

1630

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

1966

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

1631

1967

def GetAllClients(self):

1632

1968

"D-Bus method"

1633

1969

return dbus.Array(c.dbus_object_path

1634

1970

for c in tcp_server.clients)

1635

1971

1636

1972

@dbus.service.method(_interface,

1637

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

1973

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

1638

1974

def GetAllClientsWithProperties(self):

1639

1975

"D-Bus method"

1640

1976

return dbus.Dictionary(

1641

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

1977

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

1642

1978

for c in tcp_server.clients),

1643

signature=u"oa{sv}")

1979

signature="oa{sv}")

1644

1980

1645

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

1981

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

1646

1982

def RemoveClient(self, object_path):

1647

1983

"D-Bus method"

1648

1984

for c in tcp_server.clients:

1650

1986

tcp_server.clients.remove(c)

1651

1987

c.remove_from_connection()

1652

1988

# Don't signal anything except ClientRemoved

1653

c.disable(signal=False)

1989

c.disable(quiet=True)

1654

1990

# Emit D-Bus signal

1655

1991

self.ClientRemoved(object_path, c.name)

1656

1992

return

1657

raise KeyError

1993

raise KeyError(object_path)

1658

1994

1659

1995

del _interface

1660

1996

1661

1997

mandos_dbus_service = MandosDBusService()

1662

1998

1999

def cleanup():

2000

"Cleanup function; run on exit"

2001

service.cleanup()

2002

2003

while tcp_server.clients:

2004

client = tcp_server.clients.pop()

2005

if use_dbus:

2006

client.remove_from_connection()

2007

client.disable_hook = None

2008

# Don't signal anything except ClientRemoved

2009

client.disable(quiet=True)

2010

if use_dbus:

2011

# Emit D-Bus signal

2012

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2013

client.name)

2014

2015

atexit.register(cleanup)

2016

1663

2017

for client in tcp_server.clients:

1664

2018

if use_dbus:

1665

2019

# Emit D-Bus signal

1666

mandos_dbus_service.ClientAdded(client.dbus_object_path,

1667

client.GetAll(u""))

2020

mandos_dbus_service.ClientAdded(client.dbus_object_path)

1668

2021

client.enable()

1669

2022

1670

2023

tcp_server.enable()

1673

2026

# Find out what port we got

1674

2027

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

1675

2028

if use_ipv6:

1676

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

2029

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

1677

2030

" flowinfo %d, scope_id %d"

1678

2031

% tcp_server.socket.getsockname())

1679

2032

else: # IPv4

1680

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

2033

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

1681

2034

% tcp_server.socket.getsockname())

1682

2035

1683

2036

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

1686

2039

# From the Avahi example code

1687

2040

try:

1688

2041

service.activate()

1689

except dbus.exceptions.DBusException, error:

1690

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

2042

except dbus.exceptions.DBusException as error:

2043

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

2044

cleanup()

1691

2045

sys.exit(1)

1692

2046

# End of Avahi example code

1693

2047

1696

2050

(tcp_server.handle_request

1697

2051

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

1698

2052

1699

logger.debug(u"Starting main loop")

2053

logger.debug("Starting main loop")

1700

2054

main_loop.run()

1701

except AvahiError, error:

1702

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

2055

except AvahiError as error:

2056

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

2057

cleanup()

1703

2058

sys.exit(1)

1704

2059

except KeyboardInterrupt:

1705

2060

if debug:

1706

print >> sys.stderr

1707

logger.debug(u"Server received KeyboardInterrupt")

1708

logger.debug(u"Server exiting")

2061

print("", file=sys.stderr)

2062

logger.debug("Server received KeyboardInterrupt")

2063

logger.debug("Server exiting")

2064

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

2065

cleanup()

2066

1709

2067

1710

2068

if __name__ == '__main__':

1711

2069

main()