/mandos/release : revision 237.7.292

1

#!/usr/bin/python

1

#!/usr/bin/python2.7

2

# -*- mode: python; coding: utf-8 -*-

3

#

4

# Mandos server - give out binary blobs to connecting clients.

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

34

from __future__ import (division, absolute_import, print_function,

35

unicode_literals)

36

37

from future_builtins import *

38

37

39

import SocketServer as socketserver

38

40

import socket

39

41

import argparse

65

67

import types

66

68

import binascii

67

69

import tempfile

70

import itertools

71

import collections

68

72

69

73

import dbus

70

74

import dbus.service

75

79

import ctypes.util

76

80

import xml.dom.minidom

77

81

import inspect

78

import GnuPGInterface

79

82

80

83

try:

81

84

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

85

88

except ImportError:

86

89

SO_BINDTODEVICE = None

87

90

91

if sys.version_info.major == 2:

92

str = unicode

88

93

89

version = "1.4.1"

94

version = "1.6.9"

90

95

stored_state_file = "clients.pickle"

91

96

92

97

logger = logging.getLogger()

93

syslogger = (logging.handlers.SysLogHandler

94

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

95

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

98

syslogger = None

96

99

97

100

try:

98

101

if_nametoindex = (ctypes.cdll.LoadLibrary

104

107

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

105

108

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

106

109

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

107

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

108

interface))

109

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

110

ifreq[16:20])[0]

110

struct.pack(b"16s16x", interface))

111

interface_index = struct.unpack("I", ifreq[16:20])[0]

111

112

return interface_index

112

113

114

def initlogger(level=logging.WARNING):

115

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

115

116

"""init logger and add loglevel"""

116

117

118

global syslogger

119

syslogger = (logging.handlers.SysLogHandler

120

(facility =

121

logging.handlers.SysLogHandler.LOG_DAEMON,

122

address = "/dev/log"))

117

123

syslogger.setFormatter(logging.Formatter

118

124

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

119

125

' %(message)s'))

120

126

logger.addHandler(syslogger)

121

127

122

console = logging.StreamHandler()

123

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

124

' [%(process)d]:'

125

' %(levelname)s:'

126

' %(message)s'))

127

logger.addHandler(console)

128

if debug:

129

console = logging.StreamHandler()

130

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

131

' [%(process)d]:'

132

' %(levelname)s:'

133

' %(message)s'))

134

logger.addHandler(console)

128

135

logger.setLevel(level)

129

136

130

137

131

class CryptoError(Exception):

138

class PGPError(Exception):

139

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

132

140

pass

133

141

134

142

135

class Crypto(object):

143

class PGPEngine(object):

136

144

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

137

145

def __init__(self):

138

self.gnupg = GnuPGInterface.GnuPG()

139

146

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

140

self.gnupg = GnuPGInterface.GnuPG()

141

self.gnupg.options.meta_interactive = False

142

self.gnupg.options.homedir = self.tempdir

143

self.gnupg.options.extra_args.extend(['--force-mdc',

144

'--quiet'])

147

self.gnupgargs = ['--batch',

148

'--home', self.tempdir,

149

'--force-mdc',

150

'--quiet',

151

'--no-use-agent']

145

152

146

153

def __enter__(self):

147

154

return self

148

155

149

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

156

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

150

157

self._cleanup()

151

158

return False

152

159

169

176

def password_encode(self, password):

170

177

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

171

178

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

172

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

179

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

180

if len(encoded) > 2048:

181

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

182

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

183

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

184

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

185

return encoded

173

186

174

187

def encrypt(self, data, password):

175

self.gnupg.passphrase = self.password_encode(password)

176

with open(os.devnull) as devnull:

177

try:

178

proc = self.gnupg.run(['--symmetric'],

179

create_fhs=['stdin', 'stdout'],

180

attach_fhs={'stderr': devnull})

181

with contextlib.closing(proc.handles['stdin']) as f:

182

f.write(data)

183

with contextlib.closing(proc.handles['stdout']) as f:

184

ciphertext = f.read()

185

proc.wait()

186

except IOError as e:

187

raise CryptoError(e)

188

self.gnupg.passphrase = None

188

passphrase = self.password_encode(password)

189

with tempfile.NamedTemporaryFile(dir=self.tempdir

190

) as passfile:

191

passfile.write(passphrase)

192

passfile.flush()

193

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

194

'--passphrase-file',

195

passfile.name]

196

+ self.gnupgargs,

197

stdin = subprocess.PIPE,

198

stdout = subprocess.PIPE,

199

stderr = subprocess.PIPE)

200

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

201

if proc.returncode != 0:

202

raise PGPError(err)

189

203

return ciphertext

190

204

191

205

def decrypt(self, data, password):

192

self.gnupg.passphrase = self.password_encode(password)

193

with open(os.devnull) as devnull:

194

try:

195

proc = self.gnupg.run(['--decrypt'],

196

create_fhs=['stdin', 'stdout'],

197

attach_fhs={'stderr': devnull})

198

with contextlib.closing(proc.handles['stdin'] ) as f:

199

f.write(data)

200

with contextlib.closing(proc.handles['stdout']) as f:

201

decrypted_plaintext = f.read()

202

proc.wait()

203

except IOError as e:

204

raise CryptoError(e)

205

self.gnupg.passphrase = None

206

passphrase = self.password_encode(password)

207

with tempfile.NamedTemporaryFile(dir = self.tempdir

208

) as passfile:

209

passfile.write(passphrase)

210

passfile.flush()

211

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

212

'--passphrase-file',

213

passfile.name]

214

+ self.gnupgargs,

215

stdin = subprocess.PIPE,

216

stdout = subprocess.PIPE,

217

stderr = subprocess.PIPE)

218

decrypted_plaintext, err = proc.communicate(input

219

= data)

220

if proc.returncode != 0:

221

raise PGPError(err)

206

222

return decrypted_plaintext

207

223

208

224

209

210

225

class AvahiError(Exception):

211

226

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

212

227

self.value = value

213

super(AvahiError, self).__init__(value, *args, **kwargs)

214

def __unicode__(self):

215

return unicode(repr(self.value))

228

return super(AvahiError, self).__init__(value, *args,

229

**kwargs)

216

230

217

231

class AvahiServiceError(AvahiError):

218

232

pass

229

243

Used to optionally bind to the specified interface.

230

244

name: string; Example: 'Mandos'

231

245

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

232

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

246

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

233

247

port: integer; what port to announce

234

248

TXT: list of strings; TXT record for the service

235

249

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

241

255

server: D-Bus Server

242

256

bus: dbus.SystemBus()

243

257

"""

258

244

259

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

245

260

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

246

261

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

259

274

self.server = None

260

275

self.bus = bus

261

276

self.entry_group_state_changed_match = None

262

def rename(self):

277

278

def rename(self, remove=True):

263

279

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

264

280

if self.rename_count >= self.max_renames:

265

281

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

266

282

" after %i retries, exiting.",

267

283

self.rename_count)

268

284

raise AvahiServiceError("Too many renames")

269

self.name = unicode(self.server

270

.GetAlternativeServiceName(self.name))

285

self.name = str(self.server

286

.GetAlternativeServiceName(self.name))

287

self.rename_count += 1

271

288

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

272

289

self.name)

273

self.remove()

290

if remove:

291

self.remove()

274

292

try:

275

293

self.add()

276

294

except dbus.exceptions.DBusException as error:

277

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

278

self.cleanup()

279

os._exit(1)

280

self.rename_count += 1

295

if (error.get_dbus_name()

296

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

297

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

298

return self.rename(remove=False)

299

else:

300

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

301

self.cleanup()

302

os._exit(1)

303

281

304

def remove(self):

282

305

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

283

306

if self.entry_group_state_changed_match is not None:

285

308

self.entry_group_state_changed_match = None

286

309

if self.group is not None:

287

310

self.group.Reset()

311

288

312

def add(self):

289

313

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

290

314

self.remove()

307

331

dbus.UInt16(self.port),

308

332

avahi.string_array_to_txt_array(self.TXT))

309

333

self.group.Commit()

334

310

335

def entry_group_state_changed(self, state, error):

311

336

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

312

337

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

318

343

self.rename()

319

344

elif state == avahi.ENTRY_GROUP_FAILURE:

320

345

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

321

unicode(error))

322

raise AvahiGroupError("State changed: %s"

323

% unicode(error))

346

str(error))

347

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

348

.format(error))

349

324

350

def cleanup(self):

325

351

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

326

352

if self.group is not None:

331

357

pass

332

358

self.group = None

333

359

self.remove()

360

334

361

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

335

362

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

336

363

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

355

382

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

356

383

else:

357

384

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

385

358

386

def activate(self):

359

387

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

360

388

if self.server is None:

367

395

self.server_state_changed)

368

396

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

369

397

398

370

399

class AvahiServiceToSyslog(AvahiService):

371

def rename(self):

400

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

372

401

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

373

ret = AvahiService.rename(self)

402

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

374

403

syslogger.setFormatter(logging.Formatter

375

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

376

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

377

% self.name))

404

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

405

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

406

.format(self.name)))

378

407

return ret

379

408

380

def _timedelta_to_milliseconds(td):

381

"Convert a datetime.timedelta() to milliseconds"

382

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

383

+ (td.seconds * 1000)

384

+ (td.microseconds // 1000))

385

409

386

410

class Client(object):

387

411

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

388

412

389

413

Attributes:

390

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

414

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

391

415

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

392

416

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

393

417

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

411

435

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

412

436

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

413

437

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

414

415

438

last_checker_status: integer between 0 and 255 reflecting exit

416

439

status of last checker. -1 reflects crashed

417

checker, or None.

440

checker, -2 means no checker completed yet.

418

441

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

419

442

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

420

443

D-Bus identifiers

421

444

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

422

445

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

423

446

until this client is disabled

424

extended_timeout: extra long timeout when password has been sent

447

extended_timeout: extra long timeout when secret has been sent

425

448

runtime_expansions: Allowed attributes for runtime expansion.

426

449

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

427

450

disabled, or None

451

server_settings: The server_settings dict from main()

428

452

"""

429

453

430

454

runtime_expansions = ("approval_delay", "approval_duration",

431

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

432

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

455

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

456

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

457

"last_approval_request", "last_checked_ok",

433

458

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

434

435

def timeout_milliseconds(self):

436

"Return the 'timeout' attribute in milliseconds"

437

return _timedelta_to_milliseconds(self.timeout)

438

439

def extended_timeout_milliseconds(self):

440

"Return the 'extended_timeout' attribute in milliseconds"

441

return _timedelta_to_milliseconds(self.extended_timeout)

442

443

def interval_milliseconds(self):

444

"Return the 'interval' attribute in milliseconds"

445

return _timedelta_to_milliseconds(self.interval)

446

447

def approval_delay_milliseconds(self):

448

return _timedelta_to_milliseconds(self.approval_delay)

449

450

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

451

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

452

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

453

attribute."""

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

}

469

470

@staticmethod

471

def config_parser(config):

472

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

473

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

474

with exceptions for any special settings as defined above.

475

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

476

value given the same arguments.

477

"""

478

settings = {}

479

for client_name in config.sections():

480

section = dict(config.items(client_name))

481

client = settings[client_name] = {}

482

483

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

484

# Reformat values from string types to Python types

485

client["approved_by_default"] = config.getboolean(

486

client_name, "approved_by_default")

487

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

488

"enabled")

489

490

# Uppercase and remove spaces from fingerprint for later

491

# comparison purposes with return value from the

492

# fingerprint() function

493

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

494

.replace(" ", ""))

495

if "secret" in section:

496

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

497

elif "secfile" in section:

498

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

499

(section["secfile"])),

500

"rb") as secfile:

501

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

502

else:

503

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

504

.format(section))

505

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

506

client["extended_timeout"] = string_to_delta(

507

section["extended_timeout"])

508

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

509

client["approval_delay"] = string_to_delta(

510

section["approval_delay"])

511

client["approval_duration"] = string_to_delta(

512

section["approval_duration"])

513

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

514

client["last_approval_request"] = None

515

client["last_checked_ok"] = None

516

client["last_checker_status"] = -2

517

518

return settings

519

520

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

454

521

self.name = name

455

if config is None:

456

config = {}

522

if server_settings is None:

523

server_settings = {}

524

self.server_settings = server_settings

525

# adding all client settings

526

for setting, value in settings.items():

527

setattr(self, setting, value)

528

529

if self.enabled:

530

if not hasattr(self, "last_enabled"):

531

self.last_enabled = datetime.datetime.utcnow()

532

if not hasattr(self, "expires"):

533

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

534

+ self.timeout)

535

else:

536

self.last_enabled = None

537

self.expires = None

538

457

539

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

458

# Uppercase and remove spaces from fingerprint for later

459

# comparison purposes with return value from the fingerprint()

460

# function

461

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

462

.replace(" ", ""))

463

540

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

464

if "secret" in config:

465

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

466

elif "secfile" in config:

467

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

468

(config["secfile"])),

469

"rb") as secfile:

470

self.secret = secfile.read()

471

else:

472

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

473

% self.name)

474

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

475

self.created = datetime.datetime.utcnow()

476

self.enabled = config.get("enabled", True)

477

self.last_approval_request = None

478

if self.enabled:

479

self.last_enabled = datetime.datetime.utcnow()

480

else:

481

self.last_enabled = None

482

self.last_checked_ok = None

483

self.last_checker_status = None

484

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

485

self.extended_timeout = string_to_delta(config

486

["extended_timeout"])

487

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

541

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

542

datetime.datetime.utcnow())

543

544

# attributes specific for this server instance

488

545

self.checker = None

489

546

self.checker_initiator_tag = None

490

547

self.disable_initiator_tag = None

491

if self.enabled:

492

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

493

else:

494

self.expires = None

495

548

self.checker_callback_tag = None

496

self.checker_command = config["checker"]

497

549

self.current_checker_command = None

498

self._approved = None

499

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

500

True)

550

self.approved = None

501

551

self.approvals_pending = 0

502

self.approval_delay = string_to_delta(

503

config["approval_delay"])

504

self.approval_duration = string_to_delta(

505

config["approval_duration"])

506

552

self.changedstate = (multiprocessing_manager

507

553

.Condition(multiprocessing_manager

508

554

.Lock()))

528

574

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

529

575

# Already enabled

530

576

return

531

self.send_changedstate()

532

577

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

533

578

self.enabled = True

534

579

self.last_enabled = datetime.datetime.utcnow()

535

580

self.init_checker()

581

self.send_changedstate()

536

582

537

583

def disable(self, quiet=True):

538

584

"""Disable this client."""

539

585

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

540

586

return False

541

587

if not quiet:

542

self.send_changedstate()

543

if not quiet:

544

588

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

545

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

589

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

546

590

gobject.source_remove(self.disable_initiator_tag)

547

591

self.disable_initiator_tag = None

548

592

self.expires = None

549

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

593

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

550

594

gobject.source_remove(self.checker_initiator_tag)

551

595

self.checker_initiator_tag = None

552

596

self.stop_checker()

553

597

self.enabled = False

598

if not quiet:

599

self.send_changedstate()

554

600

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

555

601

return False

556

602

560

606

def init_checker(self):

561

607

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

562

608

# and every interval from then on.

609

if self.checker_initiator_tag is not None:

610

gobject.source_remove(self.checker_initiator_tag)

563

611

self.checker_initiator_tag = (gobject.timeout_add

564

(self.interval_milliseconds(),

612

(int(self.interval

613

.total_seconds() * 1000),

565

614

self.start_checker))

566

615

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

616

if self.disable_initiator_tag is not None:

617

gobject.source_remove(self.disable_initiator_tag)

567

618

self.disable_initiator_tag = (gobject.timeout_add

568

(self.timeout_milliseconds(),

569

self.disable))

619

(int(self.timeout

620

.total_seconds() * 1000),

621

self.disable))

570

622

# Also start a new checker *right now*.

571

623

self.start_checker()

572

624

575

627

self.checker_callback_tag = None

576

628

self.checker = None

577

629

if os.WIFEXITED(condition):

578

self.last_checker_status = os.WEXITSTATUS(condition)

630

self.last_checker_status = os.WEXITSTATUS(condition)

579

631

if self.last_checker_status == 0:

580

632

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

581

633

vars(self))

588

640

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

589

641

vars(self))

590

642

591

def checked_ok(self, timeout=None):

592

"""Bump up the timeout for this client.

593

594

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

595

alive and well.

596

"""

643

def checked_ok(self):

644

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

645

self.last_checked_ok = datetime.datetime.utcnow()

646

self.last_checker_status = 0

647

self.bump_timeout()

648

649

def bump_timeout(self, timeout=None):

650

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

597

651

if timeout is None:

598

652

timeout = self.timeout

599

self.last_checked_ok = datetime.datetime.utcnow()

600

653

if self.disable_initiator_tag is not None:

601

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = None

602

656

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

603

657

self.disable_initiator_tag = (gobject.timeout_add

604

(_timedelta_to_milliseconds

605

(timeout), self.disable))

658

(int(timeout.total_seconds()

659

* 1000), self.disable))

606

660

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

607

661

608

662

def need_approval(self):

614

668

If a checker already exists, leave it running and do

615

669

nothing."""

616

670

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

617

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

618

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

619

# client would inevitably timeout, since no checker would get

620

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

671

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

672

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

673

# would inevitably timeout, since no checker would get a

674

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

621

675

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

622

676

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

623

677

# should be.

625

679

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

626

680

try:

627

681

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

628

except (AttributeError, OSError) as error:

629

if (isinstance(error, OSError)

630

and error.errno != errno.ECHILD):

631

raise error

682

except AttributeError:

683

pass

684

except OSError as error:

685

if error.errno != errno.ECHILD:

686

raise

632

687

else:

633

688

if pid:

634

689

logger.warning("Checker was a zombie")

637

692

self.current_checker_command)

638

693

# Start a new checker if needed

639

694

if self.checker is None:

695

# Escape attributes for the shell

696

escaped_attrs = { attr:

697

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

698

for attr in self.runtime_expansions }

640

699

try:

641

# In case checker_command has exactly one % operator

642

command = self.checker_command % self.host

643

except TypeError:

644

# Escape attributes for the shell

645

escaped_attrs = dict(

646

(attr,

647

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

648

errors=

649

'replace')))

650

for attr in

651

self.runtime_expansions)

652

653

try:

654

command = self.checker_command % escaped_attrs

655

except TypeError as error:

656

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

657

' %s', self.checker_command, error)

658

return True # Try again later

700

command = self.checker_command % escaped_attrs

701

except TypeError as error:

702

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

659

705

self.current_checker_command = command

660

706

try:

661

707

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

664

710

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

665

711

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

666

712

# always replaced by /dev/null.)

713

# The exception is when not debugging but nevertheless

714

# running in the foreground; use the previously

715

# created wnull.

716

popen_args = {}

717

if (not self.server_settings["debug"]

718

and self.server_settings["foreground"]):

719

popen_args.update({"stdout": wnull,

720

"stderr": wnull })

667

721

self.checker = subprocess.Popen(command,

668

722

close_fds=True,

669

shell=True, cwd="/")

670

self.checker_callback_tag = (gobject.child_watch_add

671

(self.checker.pid,

672

self.checker_callback,

673

data=command))

674

# The checker may have completed before the gobject

675

# watch was added. Check for this.

723

shell=True, cwd="/",

724

**popen_args)

725

except OSError as error:

726

logger.error("Failed to start subprocess",

727

exc_info=error)

728

return True

729

self.checker_callback_tag = (gobject.child_watch_add

730

(self.checker.pid,

731

self.checker_callback,

732

data=command))

733

# The checker may have completed before the gobject

734

# watch was added. Check for this.

735

try:

676

736

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

677

if pid:

678

gobject.source_remove(self.checker_callback_tag)

679

self.checker_callback(pid, status, command)

680

737

except OSError as error:

681

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

682

error)

738

if error.errno == errno.ECHILD:

739

# This should never happen

740

logger.error("Child process vanished",

741

exc_info=error)

742

return True

743

raise

744

if pid:

745

gobject.source_remove(self.checker_callback_tag)

746

self.checker_callback(pid, status, command)

683

747

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

684

748

return True

685

749

692

756

return

693

757

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

694

758

try:

695

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

759

self.checker.terminate()

696

760

#time.sleep(0.5)

697

761

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

698

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

762

# self.checker.kill()

699

763

except OSError as error:

700

764

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

701

765

raise

718

782

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

719

783

if byte_arrays and signature != "ay":

720

784

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

721

" signature %r" % signature)

785

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

722

786

def decorator(func):

723

787

func._dbus_is_property = True

724

788

func._dbus_interface = dbus_interface

732

796

return decorator

733

797

734

798

799

def dbus_interface_annotations(dbus_interface):

800

"""Decorator for marking functions returning interface annotations

801

802

Usage:

803

804

@dbus_interface_annotations("org.example.Interface")

805

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

806

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

807

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

808

"false"}

809

"""

810

def decorator(func):

811

func._dbus_is_interface = True

812

func._dbus_interface = dbus_interface

813

func._dbus_name = dbus_interface

814

return func

815

return decorator

816

817

818

def dbus_annotations(annotations):

819

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

820

Usage:

821

822

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

823

"org.freedesktop.DBus.Property."

824

"EmitsChangedSignal": "false"})

825

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

826

access="r")

827

def Property_dbus_property(self):

828

return dbus.Boolean(False)

829

"""

830

def decorator(func):

831

func._dbus_annotations = annotations

832

return func

833

return decorator

834

835

735

836

class DBusPropertyException(dbus.exceptions.DBusException):

736

837

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

737

838

"""

738

def __unicode__(self):

739

return unicode(str(self))

740

839

pass

741

840

742

841

class DBusPropertyAccessException(DBusPropertyException):

743

842

"""A property's access permissions disallows an operation.

760

859

"""

761

860

762

861

@staticmethod

763

def _is_dbus_property(obj):

764

return getattr(obj, "_dbus_is_property", False)

862

def _is_dbus_thing(thing):

863

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

864

865

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

866

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

867

"""

868

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

869

False)

765

870

766

def _get_all_dbus_properties(self):

871

def _get_all_dbus_things(self, thing):

767

872

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

768

873

"""

769

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

874

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

875

name),

876

athing.__get__(self))

770

877

for cls in self.__class__.__mro__

771

for name, prop in

772

inspect.getmembers(cls, self._is_dbus_property))

878

for name, athing in

879

inspect.getmembers(cls,

880

self._is_dbus_thing(thing)))

773

881

774

882

def _get_dbus_property(self, interface_name, property_name):

775

883

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

777

885

"""

778

886

for cls in self.__class__.__mro__:

779

887

for name, value in (inspect.getmembers

780

(cls, self._is_dbus_property)):

888

(cls,

889

self._is_dbus_thing("property"))):

781

890

if (value._dbus_name == property_name

782

891

and value._dbus_interface == interface_name):

783

892

return value.__get__(self)

811

920

# The byte_arrays option is not supported yet on

812

921

# signatures other than "ay".

813

922

if prop._dbus_signature != "ay":

814

raise ValueError

815

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

816

for byte in value))

923

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

924

"'ay' signature {!r}"

925

.format(prop._dbus_signature))

926

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

927

for byte in value))

817

928

prop(value)

818

929

819

930

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

825

936

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

826

937

"""

827

938

properties = {}

828

for name, prop in self._get_all_dbus_properties():

939

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

829

940

if (interface_name

830

941

and interface_name != prop._dbus_interface):

831

942

# Interface non-empty but did not match

841

952

value.variant_level+1)

842

953

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

843

954

955

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

956

def PropertiesChanged(self, interface_name, changed_properties,

957

invalidated_properties):

958

"""Standard D-Bus PropertiesChanged() signal, see D-Bus

959

standard.

960

"""

961

pass

962

844

963

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

845

964

out_signature="s",

846

965

path_keyword='object_path',

847

966

connection_keyword='connection')

848

967

def Introspect(self, object_path, connection):

849

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

968

"""Overloading of standard D-Bus method.

969

970

Inserts property tags and interface annotation tags.

850

971

"""

851

972

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

852

973

connection)

859

980

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

860

981

return e

861

982

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

983

# Add property tags

862

984

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

863

985

for name, prop

864

in self._get_all_dbus_properties()

986

in self._get_all_dbus_things("property")

865

987

if prop._dbus_interface

866

988

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

867

989

if_tag.appendChild(tag)

990

# Add annotation tags

991

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

992

for tag in if_tag.getElementsByTagName(typ):

993

annots = dict()

994

for name, prop in (self.

995

_get_all_dbus_things(typ)):

996

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

997

and prop._dbus_interface

998

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

999

annots.update(getattr

1000

(prop,

1001

"_dbus_annotations",

1002

{}))

1003

for name, value in annots.items():

1004

ann_tag = document.createElement(

1005

"annotation")

1006

ann_tag.setAttribute("name", name)

1007

ann_tag.setAttribute("value", value)

1008

tag.appendChild(ann_tag)

1009

# Add interface annotation tags

1010

for annotation, value in dict(

1011

itertools.chain.from_iterable(

1012

annotations().items()

1013

for name, annotations in

1014

self._get_all_dbus_things("interface")

1015

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

1016

)).items():

1017

ann_tag = document.createElement("annotation")

1018

ann_tag.setAttribute("name", annotation)

1019

ann_tag.setAttribute("value", value)

1020

if_tag.appendChild(ann_tag)

868

1021

# Add the names to the return values for the

869

1022

# "org.freedesktop.DBus.Properties" methods

870

1023

if (if_tag.getAttribute("name")

885

1038

except (AttributeError, xml.dom.DOMException,

886

1039

xml.parsers.expat.ExpatError) as error:

887

1040

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

888

error)

1041

exc_info=error)

889

1042

return xmlstring

890

1043

891

1044

892

def datetime_to_dbus (dt, variant_level=0):

1045

def datetime_to_dbus(dt, variant_level=0):

893

1046

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

894

1047

if dt is None:

895

1048

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

897

1050

variant_level=variant_level)

898

1051

899

1052

900

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

901

.__metaclass__):

902

"""Applied to an empty subclass of a D-Bus object, this metaclass

903

will add additional D-Bus attributes matching a certain pattern.

1053

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1054

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

1055

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

1056

interface names according to the "alt_interface_names" mapping.

1057

Usage:

1058

1059

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

1060

"net.example.AlternateInterface"})

1061

class SampleDBusObject(dbus.service.Object):

1062

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

1063

def SampleDBusMethod():

1064

pass

1065

1066

The above "SampleDBusMethod" on "SampleDBusObject" will be

1067

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

1068

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

1069

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

1070

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

1071

1072

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

1073

(from DBusObjectWithProperties) and interfaces (from the

1074

dbus_interface_annotations decorator).

904

1075

"""

905

def __new__(mcs, name, bases, attr):

906

# Go through all the base classes which could have D-Bus

907

# methods, signals, or properties in them

908

for base in (b for b in bases

909

if issubclass(b, dbus.service.Object)):

910

# Go though all attributes of the base class

911

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

1076

def wrapper(cls):

1077

for orig_interface_name, alt_interface_name in (

1078

alt_interface_names.items()):

1079

attr = {}

1080

interface_names = set()

1081

# Go though all attributes of the class

1082

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

912

1083

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

913

1084

# with the wrong interface name

914

1085

if (not hasattr(attribute, "_dbus_interface")

915

1086

or not attribute._dbus_interface

916

.startswith("se.recompile.Mandos")):

1087

.startswith(orig_interface_name)):

917

1088

continue

918

1089

# Create an alternate D-Bus interface name based on

919

1090

# the current name

920

1091

alt_interface = (attribute._dbus_interface

921

.replace("se.recompile.Mandos",

922

"se.bsnet.fukt.Mandos"))

1092

.replace(orig_interface_name,

1093

alt_interface_name))

1094

interface_names.add(alt_interface)

923

1095

# Is this a D-Bus signal?

924

1096

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

925

# Extract the original non-method function by

926

# black magic

1097

# Extract the original non-method undecorated

1098

# function by black magic

927

1099

nonmethod_func = (dict(

928

1100

zip(attribute.func_code.co_freevars,

929

1101

attribute.__closure__))["func"]

940

1112

nonmethod_func.func_name,

941

1113

nonmethod_func.func_defaults,

942

1114

nonmethod_func.func_closure)))

1115

# Copy annotations, if any

1116

try:

1117

new_function._dbus_annotations = (

1118

dict(attribute._dbus_annotations))

1119

except AttributeError:

1120

pass

943

1121

# Define a creator of a function to call both the

944

# old and new functions, so both the old and new

945

# signals gets sent when the function is called

1122

# original and alternate functions, so both the

1123

# original and alternate signals gets sent when

1124

# the function is called

946

1125

def fixscope(func1, func2):

947

1126

"""This function is a scope container to pass

948

1127

func1 and func2 to the "call_both" function

955

1134

return call_both

956

1135

# Create the "call_both" function and add it to

957

1136

# the class

958

attr[attrname] = fixscope(attribute,

959

new_function)

1137

attr[attrname] = fixscope(attribute, new_function)

960

1138

# Is this a D-Bus method?

961

1139

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

962

1140

# Create a new, but exactly alike, function

973

1151

attribute.func_name,

974

1152

attribute.func_defaults,

975

1153

attribute.func_closure)))

1154

# Copy annotations, if any

1155

try:

1156

attr[attrname]._dbus_annotations = (

1157

dict(attribute._dbus_annotations))

1158

except AttributeError:

1159

pass

976

1160

# Is this a D-Bus property?

977

1161

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

978

1162

# Create a new, but exactly alike, function

992

1176

attribute.func_name,

993

1177

attribute.func_defaults,

994

1178

attribute.func_closure)))

995

return type.__new__(mcs, name, bases, attr)

996

997

1179

# Copy annotations, if any

1180

try:

1181

attr[attrname]._dbus_annotations = (

1182

dict(attribute._dbus_annotations))

1183

except AttributeError:

1184

pass

1185

# Is this a D-Bus interface?

1186

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

1187

# Create a new, but exactly alike, function

1188

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

1189

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

1190

# to the class.

1191

attr[attrname] = (dbus_interface_annotations

1192

(alt_interface)

1193

(types.FunctionType

1194

(attribute.func_code,

1195

attribute.func_globals,

1196

attribute.func_name,

1197

attribute.func_defaults,

1198

attribute.func_closure)))

1199

if deprecate:

1200

# Deprecate all alternate interfaces

1201

iname="_AlternateDBusNames_interface_annotation{}"

1202

for interface_name in interface_names:

1203

@dbus_interface_annotations(interface_name)

1204

def func(self):

1205

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

1206

"true" }

1207

# Find an unused name

1208

for aname in (iname.format(i)

1209

for i in itertools.count()):

1210

if aname not in attr:

1211

attr[aname] = func

1212

break

1213

if interface_names:

1214

# Replace the class with a new subclass of it with

1215

# methods, signals, etc. as created above.

1216

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

1217

(cls,), attr)

1218

return cls

1219

return wrapper

1220

1221

1222

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

1223

"se.bsnet.fukt.Mandos"})

998

1224

class ClientDBus(Client, DBusObjectWithProperties):

999

1225

"""A Client class using D-Bus

1000

1226

1006

1232

runtime_expansions = (Client.runtime_expansions

1007

1233

+ ("dbus_object_path",))

1008

1234

1235

_interface = "se.recompile.Mandos.Client"

1236

1009

1237

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

1010

1238

1011

1239

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

1012

1240

self.bus = bus

1013

1241

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

1014

1015

self._approvals_pending = 0

1016

1242

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

1017

1243

# the D-Bus

1018

client_object_name = unicode(self.name).translate(

1244

client_object_name = str(self.name).translate(

1019

1245

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

1020

1246

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

1021

1247

self.dbus_object_path = (dbus.ObjectPath

1022

1248

("/clients/" + client_object_name))

1023

1249

DBusObjectWithProperties.__init__(self, self.bus,

1024

1250

self.dbus_object_path)

1025

1251

1026

1252

def notifychangeproperty(transform_func,

1027

1253

dbus_name, type_func=lambda x: x,

1028

variant_level=1):

1254

variant_level=1, invalidate_only=False,

1255

_interface=_interface):

1029

1256

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

1030

1257

its changes to DBus.

1031

1258

1036

1263

to the D-Bus. Default: no transform

1037

1264

variant_level: D-Bus variant level. Default: 1

1038

1265

"""

1039

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

1266

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

1040

1267

def setter(self, value):

1041

1268

if hasattr(self, "dbus_object_path"):

1042

1269

if (not hasattr(self, attrname) or

1043

1270

type_func(getattr(self, attrname, None))

1044

1271

!= type_func(value)):

1045

dbus_value = transform_func(type_func(value),

1046

variant_level

1047

=variant_level)

1048

self.PropertyChanged(dbus.String(dbus_name),

1049

dbus_value)

1272

if invalidate_only:

1273

self.PropertiesChanged(_interface,

1274

dbus.Dictionary(),

1275

dbus.Array

1276

((dbus_name,)))

1277

else:

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1281

self.PropertyChanged(dbus.String(dbus_name),

1282

dbus_value)

1283

self.PropertiesChanged(_interface,

1284

dbus.Dictionary({

1285

dbus.String(dbus_name):

1286

dbus_value }), dbus.Array())

1050

1287

setattr(self, attrname, value)

1051

1288

1052

1289

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

1053

1290

1054

1055

1291

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1056

1292

approvals_pending = notifychangeproperty(dbus.Boolean,

1057

1293

"ApprovalPending",

1064

1300

checker is not None)

1065

1301

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1066

1302

"LastCheckedOK")

1303

last_checker_status = notifychangeproperty(dbus.Int16,

1304

"LastCheckerStatus")

1067

1305

last_approval_request = notifychangeproperty(

1068

1306

datetime_to_dbus, "LastApprovalRequest")

1069

1307

approved_by_default = notifychangeproperty(dbus.Boolean,

1070

1308

"ApprovedByDefault")

1071

approval_delay = notifychangeproperty(dbus.UInt16,

1309

approval_delay = notifychangeproperty(dbus.UInt64,

1072

1310

"ApprovalDelay",

1073

1311

type_func =

1074

_timedelta_to_milliseconds)

1312

lambda td: td.total_seconds()

1313

* 1000)

1075

1314

approval_duration = notifychangeproperty(

1076

dbus.UInt16, "ApprovalDuration",

1077

type_func = _timedelta_to_milliseconds)

1315

dbus.UInt64, "ApprovalDuration",

1316

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

1078

1317

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

1079

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

1080

type_func =

1081

_timedelta_to_milliseconds)

1318

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

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1082

1321

extended_timeout = notifychangeproperty(

1083

dbus.UInt16, "ExtendedTimeout",

1084

type_func = _timedelta_to_milliseconds)

1085

interval = notifychangeproperty(dbus.UInt16,

1322

dbus.UInt64, "ExtendedTimeout",

1323

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

1324

interval = notifychangeproperty(dbus.UInt64,

1086

1325

"Interval",

1087

1326

type_func =

1088

_timedelta_to_milliseconds)

1327

lambda td: td.total_seconds()

1328

* 1000)

1089

1329

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

1330

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

1331

invalidate_only=True)

1090

1332

1091

1333

del notifychangeproperty

1092

1334

1119

1361

*args, **kwargs)

1120

1362

1121

1363

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

1122

old_checker = self.checker

1123

if self.checker is not None:

1124

old_checker_pid = self.checker.pid

1125

else:

1126

old_checker_pid = None

1364

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

1127

1365

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

1128

1366

# Only if new checker process was started

1129

1367

if (self.checker is not None

1133

1371

return r

1134

1372

1135

1373

def _reset_approved(self):

1136

self._approved = None

1374

self.approved = None

1137

1375

return False

1138

1376

1139

1377

def approve(self, value=True):

1378

self.approved = value

1379

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

1380

* 1000), self._reset_approved)

1140

1381

self.send_changedstate()

1141

self._approved = value

1142

gobject.timeout_add(_timedelta_to_milliseconds

1143

(self.approval_duration),

1144

self._reset_approved)

1145

1146

1382

1147

1383

## D-Bus methods, signals & properties

1148

_interface = "se.recompile.Mandos.Client"

1384

1385

## Interfaces

1149

1386

1150

1387

## Signals

1151

1388

1162

1399

pass

1163

1400

1164

1401

# PropertyChanged - signal

1402

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

1165

1403

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

1166

1404

def PropertyChanged(self, property, value):

1167

1405

"D-Bus signal"

1188

1426

"D-Bus signal"

1189

1427

return self.need_approval()

1190

1428

1191

# NeRwequest - signal

1192

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

1193

def NewRequest(self, ip):

1194

"""D-Bus signal

1195

Is sent after a client request a password.

1196

"""

1197

pass

1198

1199

1429

## Methods

1200

1430

1201

1431

# Approve - method

1251

1481

access="readwrite")

1252

1482

def ApprovalDelay_dbus_property(self, value=None):

1253

1483

if value is None: # get

1254

return dbus.UInt64(self.approval_delay_milliseconds())

1484

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

1485

* 1000)

1255

1486

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

1256

1487

1257

1488

# ApprovalDuration - property

1259

1490

access="readwrite")

1260

1491

def ApprovalDuration_dbus_property(self, value=None):

1261

1492

if value is None: # get

1262

return dbus.UInt64(_timedelta_to_milliseconds(

1263

self.approval_duration))

1493

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

1494

* 1000)

1264

1495

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

1265

1496

1266

1497

# Name - property

1279

1510

def Host_dbus_property(self, value=None):

1280

1511

if value is None: # get

1281

1512

return dbus.String(self.host)

1282

self.host = value

1513

self.host = str(value)

1283

1514

1284

1515

# Created - property

1285

1516

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

1311

1542

return

1312

1543

return datetime_to_dbus(self.last_checked_ok)

1313

1544

1545

# LastCheckerStatus - property

1546

@dbus_service_property(_interface, signature="n",

1547

access="read")

1548

def LastCheckerStatus_dbus_property(self):

1549

return dbus.Int16(self.last_checker_status)

1550

1314

1551

# Expires - property

1315

1552

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

1316

1553

def Expires_dbus_property(self):

1326

1563

access="readwrite")

1327

1564

def Timeout_dbus_property(self, value=None):

1328

1565

if value is None: # get

1329

return dbus.UInt64(self.timeout_milliseconds())

1566

return dbus.UInt64(self.timeout.total_seconds() * 1000)

1567

old_timeout = self.timeout

1330

1568

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

1331

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

1332

return

1333

# Reschedule timeout

1334

gobject.source_remove(self.disable_initiator_tag)

1335

self.disable_initiator_tag = None

1336

self.expires = None

1337

time_to_die = _timedelta_to_milliseconds((self

1338

.last_checked_ok

1339

+ self.timeout)

1340

- datetime.datetime

1341

.utcnow())

1342

if time_to_die <= 0:

1343

# The timeout has passed

1344

self.disable()

1345

else:

1346

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

1347

+ datetime.timedelta(milliseconds =

1348

time_to_die))

1349

self.disable_initiator_tag = (gobject.timeout_add

1350

(time_to_die, self.disable))

1569

# Reschedule disabling

1570

if self.enabled:

1571

now = datetime.datetime.utcnow()

1572

self.expires += self.timeout - old_timeout

1573

if self.expires <= now:

1574

# The timeout has passed

1575

self.disable()

1576

else:

1577

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

1578

is None):

1579

return

1580

gobject.source_remove(self.disable_initiator_tag)

1581

self.disable_initiator_tag = (

1582

gobject.timeout_add(

1583

int((self.expires - now).total_seconds()

1584

* 1000), self.disable))

1351

1585

1352

1586

# ExtendedTimeout - property

1353

1587

@dbus_service_property(_interface, signature="t",

1354

1588

access="readwrite")

1355

1589

def ExtendedTimeout_dbus_property(self, value=None):

1356

1590

if value is None: # get

1357

return dbus.UInt64(self.extended_timeout_milliseconds())

1591

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

1592

* 1000)

1358

1593

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

1359

1594

1360

1595

# Interval - property

1362

1597

access="readwrite")

1363

1598

def Interval_dbus_property(self, value=None):

1364

1599

if value is None: # get

1365

return dbus.UInt64(self.interval_milliseconds())

1600

return dbus.UInt64(self.interval.total_seconds() * 1000)

1366

1601

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

1367

1602

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

1368

1603

return

1379

1614

def Checker_dbus_property(self, value=None):

1380

1615

if value is None: # get

1381

1616

return dbus.String(self.checker_command)

1382

self.checker_command = value

1617

self.checker_command = str(value)

1383

1618

1384

1619

# CheckerRunning - property

1385

1620

@dbus_service_property(_interface, signature="b",

1401

1636

@dbus_service_property(_interface, signature="ay",

1402

1637

access="write", byte_arrays=True)

1403

1638

def Secret_dbus_property(self, value):

1404

self.secret = str(value)

1639

self.secret = bytes(value)

1405

1640

1406

1641

del _interface

1407

1642

1414

1649

raise KeyError()

1415

1650

1416

1651

def __getattribute__(self, name):

1417

if(name == '_pipe'):

1652

if name == '_pipe':

1418

1653

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

1419

1654

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

1420

1655

data = self._pipe.recv()

1427

1662

return func

1428

1663

1429

1664

def __setattr__(self, name, value):

1430

if(name == '_pipe'):

1665

if name == '_pipe':

1431

1666

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

1432

1667

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

1433

1668

1434

1669

1435

class ClientDBusTransitional(ClientDBus):

1436

__metaclass__ = AlternateDBusNamesMetaclass

1437

1438

1439

1670

class ClientHandler(socketserver.BaseRequestHandler, object):

1440

1671

"""A class to handle client connections.

1441

1672

1445

1676

def handle(self):

1446

1677

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

1447

1678

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

1448

unicode(self.client_address))

1679

str(self.client_address))

1449

1680

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

1450

1681

self.server.child_pipe.fileno())

1451

1682

1477

1708

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

1478

1709

try:

1479

1710

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

1480

raise RuntimeError

1711

raise RuntimeError(line)

1481

1712

except (ValueError, IndexError, RuntimeError) as error:

1482

1713

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

1483

1714

return

1502

1733

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

1503

1734

return

1504

1735

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

1505

if self.server.use_dbus:

1506

# Emit D-Bus signal

1507

client.NewRequest(str(self.client_address))

1508

1736

1509

1737

try:

1510

1738

client = ProxyClient(child_pipe, fpr,

1526

1754

client.Rejected("Disabled")

1527

1755

return

1528

1756

1529

if client._approved or not client.approval_delay:

1757

if client.approved or not client.approval_delay:

1530

1758

#We are approved or approval is disabled

1531

1759

break

1532

elif client._approved is None:

1760

elif client.approved is None:

1533

1761

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

1534

1762

client.name)

1535

1763

if self.server.use_dbus:

1536

1764

# Emit D-Bus signal

1537

1765

client.NeedApproval(

1538

client.approval_delay_milliseconds(),

1539

client.approved_by_default)

1766

client.approval_delay.total_seconds()

1767

* 1000, client.approved_by_default)

1540

1768

else:

1541

1769

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

1542

1770

client.name)

1548

1776

#wait until timeout or approved

1549

1777

time = datetime.datetime.now()

1550

1778

client.changedstate.acquire()

1551

(client.changedstate.wait

1552

(float(client._timedelta_to_milliseconds(delay)

1553

/ 1000)))

1779

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

1554

1780

client.changedstate.release()

1555

1781

time2 = datetime.datetime.now()

1556

1782

if (time2 - time) >= delay:

1572

1798

try:

1573

1799

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

1574

1800

except gnutls.errors.GNUTLSError as error:

1575

logger.warning("gnutls send failed")

1801

logger.warning("gnutls send failed",

1802

exc_info=error)

1576

1803

return

1577

1804

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

1578

1805

sent, len(client.secret)

1581

1808

1582

1809

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

1583

1810

# bump the timeout using extended_timeout

1584

client.checked_ok(client.extended_timeout)

1811

client.bump_timeout(client.extended_timeout)

1585

1812

if self.server.use_dbus:

1586

1813

# Emit D-Bus signal

1587

1814

client.GotSecret()

1592

1819

try:

1593

1820

session.bye()

1594

1821

except gnutls.errors.GNUTLSError as error:

1595

logger.warning("GnuTLS bye failed")

1822

logger.warning("GnuTLS bye failed",

1823

exc_info=error)

1596

1824

1597

1825

@staticmethod

1598

1826

def peer_certificate(session):

1663

1891

def sub_process_main(self, request, address):

1664

1892

try:

1665

1893

self.finish_request(request, address)

1666

except:

1894

except Exception:

1667

1895

self.handle_error(request, address)

1668

1896

self.close_request(request)

1669

1897

1670

1898

def process_request(self, request, address):

1671

1899

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

1672

1900

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

1673

args = (request,

1674

address))

1901

args = (request, address))

1675

1902

proc.start()

1676

1903

return proc

1677

1904

1692

1919

1693

1920

def add_pipe(self, parent_pipe, proc):

1694

1921

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

1695

raise NotImplementedError

1922

raise NotImplementedError()

1696

1923

1697

1924

1698

1925

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1705

1932

use_ipv6: Boolean; to use IPv6 or not

1706

1933

"""

1707

1934

def __init__(self, server_address, RequestHandlerClass,

1708

interface=None, use_ipv6=True):

1935

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

1936

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

1937

creating a new one with socket.socket().

1938

"""

1709

1939

self.interface = interface

1710

1940

if use_ipv6:

1711

1941

self.address_family = socket.AF_INET6

1942

if socketfd is not None:

1943

# Save the file descriptor

1944

self.socketfd = socketfd

1945

# Save the original socket.socket() function

1946

self.socket_socket = socket.socket

1947

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

1948

#

1949

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

1950

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

1951

# patching socket.socket.)

1952

#

1953

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

1954

@functools.wraps(socket.socket)

1955

def socket_wrapper(*args, **kwargs):

1956

# Restore original function so subsequent calls are

1957

# not affected.

1958

socket.socket = self.socket_socket

1959

del self.socket_socket

1960

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

1961

# saved file descriptor.

1962

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

1963

# Replace socket.socket() function with wrapper

1964

socket.socket = socket_wrapper

1965

# The socketserver.TCPServer.__init__ will call

1966

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

1967

# socket_wrapper(), if socketfd was set.

1712

1968

socketserver.TCPServer.__init__(self, server_address,

1713

1969

RequestHandlerClass)

1970

1714

1971

def server_bind(self):

1715

1972

"""This overrides the normal server_bind() function

1716

1973

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

1724

1981

try:

1725

1982

self.socket.setsockopt(socket.SOL_SOCKET,

1726

1983

SO_BINDTODEVICE,

1727

str(self.interface

1728

+ '\0'))

1984

(self.interface + "\0")

1985

.encode("utf-8"))

1729

1986

except socket.error as error:

1730

if error[0] == errno.EPERM:

1731

logger.error("No permission to"

1732

" bind to interface %s",

1733

self.interface)

1734

elif error[0] == errno.ENOPROTOOPT:

1987

if error.errno == errno.EPERM:

1988

logger.error("No permission to bind to"

1989

" interface %s", self.interface)

1990

elif error.errno == errno.ENOPROTOOPT:

1735

1991

logger.error("SO_BINDTODEVICE not available;"

1736

1992

" cannot bind to interface %s",

1737

1993

self.interface)

1994

elif error.errno == errno.ENODEV:

1995

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

1996

" cannot bind", self.interface)

1738

1997

else:

1739

1998

raise

1740

1999

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

1743

2002

if self.address_family == socket.AF_INET6:

1744

2003

any_address = "::" # in6addr_any

1745

2004

else:

1746

any_address = socket.INADDR_ANY

2005

any_address = "0.0.0.0" # INADDR_ANY

1747

2006

self.server_address = (any_address,

1748

2007

self.server_address[1])

1749

2008

elif not self.server_address[1]:

1770

2029

"""

1771

2030

def __init__(self, server_address, RequestHandlerClass,

1772

2031

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

1773

gnutls_priority=None, use_dbus=True):

2032

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

1774

2033

self.enabled = False

1775

2034

self.clients = clients

1776

2035

if self.clients is None:

1780

2039

IPv6_TCPServer.__init__(self, server_address,

1781

2040

RequestHandlerClass,

1782

2041

interface = interface,

1783

use_ipv6 = use_ipv6)

2042

use_ipv6 = use_ipv6,

2043

socketfd = socketfd)

1784

2044

def server_activate(self):

1785

2045

if self.enabled:

1786

2046

return socketserver.TCPServer.server_activate(self)

1799

2059

1800

2060

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

1801

2061

proc = None, client_object=None):

1802

condition_names = {

1803

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

1804

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

1805

# blocking).

1806

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

1807

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

1808

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

1809

# broken, usually for pipes and

1810

# sockets).

1811

}

1812

conditions_string = ' | '.join(name

1813

for cond, name in

1814

condition_names.iteritems()

1815

if cond & condition)

1816

2062

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

1817

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

2063

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

1818

2064

# Wait for other process to exit

1819

2065

proc.join()

1820

2066

return False

1878

2124

return True

1879

2125

1880

2126

2127

def rfc3339_duration_to_delta(duration):

2128

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

2129

2130

>>> rfc3339_duration_to_delta("P7D")

2131

datetime.timedelta(7)

2132

>>> rfc3339_duration_to_delta("PT60S")

2133

datetime.timedelta(0, 60)

2134

>>> rfc3339_duration_to_delta("PT60M")

2135

datetime.timedelta(0, 3600)

2136

>>> rfc3339_duration_to_delta("PT24H")

2137

datetime.timedelta(1)

2138

>>> rfc3339_duration_to_delta("P1W")

2139

datetime.timedelta(7)

2140

>>> rfc3339_duration_to_delta("PT5M30S")

2141

datetime.timedelta(0, 330)

2142

>>> rfc3339_duration_to_delta("P1DT3M20S")

2143

datetime.timedelta(1, 200)

2144

"""

2145

2146

# Parsing an RFC 3339 duration with regular expressions is not

2147

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

2148

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

2149

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

2150

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

2151

# avoid excessive use of external libraries.

2152

2153

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

2154

Token = collections.namedtuple("Token",

2155

("regexp", # To match token; if

2156

# "value" is not None,

2157

# must have a "group"

2158

# containing digits

2159

"value", # datetime.timedelta or

2160

# None

2161

"followers")) # Tokens valid after

2162

# this token

2163

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

2164

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

2165

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

2166

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

2167

datetime.timedelta(seconds=1),

2168

frozenset((token_end,)))

2169

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

2170

datetime.timedelta(minutes=1),

2171

frozenset((token_second, token_end)))

2172

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

2173

datetime.timedelta(hours=1),

2174

frozenset((token_minute, token_end)))

2175

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

2176

None,

2177

frozenset((token_hour, token_minute,

2178

token_second)))

2179

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

2180

datetime.timedelta(days=1),

2181

frozenset((token_time, token_end)))

2182

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

2183

datetime.timedelta(weeks=4),

2184

frozenset((token_day, token_end)))

2185

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

2186

datetime.timedelta(weeks=52),

2187

frozenset((token_month, token_end)))

2188

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

2189

datetime.timedelta(weeks=1),

2190

frozenset((token_end,)))

2191

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

2192

frozenset((token_year, token_month,

2193

token_day, token_time,

2194

token_week)))

2195

# Define starting values

2196

value = datetime.timedelta() # Value so far

2197

found_token = None

2198

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

2199

s = duration # String left to parse

2200

# Loop until end token is found

2201

while found_token is not token_end:

2202

# Search for any currently valid tokens

2203

for token in followers:

2204

match = token.regexp.match(s)

2205

if match is not None:

2206

# Token found

2207

if token.value is not None:

2208

# Value found, parse digits

2209

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

2210

# Add to value so far

2211

value += factor * token.value

2212

# Strip token from string

2213

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

2214

# Go to found token

2215

found_token = token

2216

# Set valid next tokens

2217

followers = found_token.followers

2218

break

2219

else:

2220

# No currently valid tokens were found

2221

raise ValueError("Invalid RFC 3339 duration")

2222

# End token found

2223

return value

2224

2225

1881

2226

def string_to_delta(interval):

1882

2227

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

1883

2228

1894

2239

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

1895

2240

datetime.timedelta(0, 330)

1896

2241

"""

2242

2243

try:

2244

return rfc3339_duration_to_delta(interval)

2245

except ValueError:

2246

pass

2247

1897

2248

timevalue = datetime.timedelta(0)

1898

2249

for s in interval.split():

1899

2250

try:

1900

suffix = unicode(s[-1])

2251

suffix = s[-1]

1901

2252

value = int(s[:-1])

1902

2253

if suffix == "d":

1903

2254

delta = datetime.timedelta(value)

1910

2261

elif suffix == "w":

1911

2262

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

1912

2263

else:

1913

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

1914

except (ValueError, IndexError) as e:

2264

raise ValueError("Unknown suffix {!r}"

2265

.format(suffix))

2266

except IndexError as e:

1915

2267

raise ValueError(*(e.args))

1916

2268

timevalue += delta

1917

2269

return timevalue

1930

2282

sys.exit()

1931

2283

if not noclose:

1932

2284

# Close all standard open file descriptors

1933

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

2285

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

1934

2286

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

1935

raise OSError(errno.ENODEV,

1936

"%s not a character device"

1937

% os.path.devnull)

2287

raise OSError(errno.ENODEV, "{} not a character device"

2288

.format(os.devnull))

1938

2289

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

1939

2290

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

1940

2291

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

1949

2300

1950

2301

parser = argparse.ArgumentParser()

1951

2302

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

1952

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

2303

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

1953

2304

help="show version number and exit")

1954

2305

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

1955

2306

help="Bind to interface IF")

1961

2312

help="Run self-test")

1962

2313

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

1963

2314

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

1964

" to terminal")

2315

" to terminal", default=None)

1965

2316

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

1966

2317

help="Debug level for stdout output")

1967

2318

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

1974

2325

" files")

1975

2326

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

1976

2327

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

1977

" system bus interface")

2328

" system bus interface", default=None)

1978

2329

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

1979

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

2330

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

2331

default=None)

1980

2332

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

1981

2333

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

1982

" state")

2334

" state", default=None)

2335

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

2336

help="Specify a file descriptor to a network"

2337

" socket to use instead of creating one")

1983

2338

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

1984

2339

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

2340

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

2341

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

2342

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

2343

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

2344

default=None)

1985

2345

1986

2346

options = parser.parse_args()

1987

2347

1988

2348

if options.check:

1989

2349

import doctest

1990

doctest.testmod()

1991

sys.exit()

2350

fail_count, test_count = doctest.testmod()

2351

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

1992

2352

1993

2353

# Default values for config file for server-global settings

1994

2354

server_defaults = { "interface": "",

1996

2356

"port": "",

1997

2357

"debug": "False",

1998

2358

"priority":

1999

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

2359

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

2360

":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2000

2361

"servicename": "Mandos",

2001

2362

"use_dbus": "True",

2002

2363

"use_ipv6": "True",

2003

2364

"debuglevel": "",

2004

2365

"restore": "True",

2005

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

2366

"socket": "",

2367

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

2368

"foreground": "False",

2369

"zeroconf": "True",

2006

2370

}

2007

2371

2008

2372

# Parse config file for server-global settings

2013

2377

# Convert the SafeConfigParser object to a dict

2014

2378

server_settings = server_config.defaults()

2015

2379

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

2016

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

2380

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

2017

2381

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

2018

2382

option)

2019

2383

if server_settings["port"]:

2020

2384

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

2021

2385

"port")

2386

if server_settings["socket"]:

2387

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

2388

"socket")

2389

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

2390

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

2391

# happen with a supplied network socket.

2392

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

2393

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

2394

["socket"])

2022

2395

del server_config

2023

2396

2024

2397

# Override the settings from the config file with command line

2026

2399

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

2027

2400

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

2028

2401

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

2029

"statedir"):

2402

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

2030

2403

value = getattr(options, option)

2031

2404

if value is not None:

2032

2405

server_settings[option] = value

2033

2406

del options

2034

2407

# Force all strings to be unicode

2035

2408

for option in server_settings.keys():

2036

if type(server_settings[option]) is str:

2037

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

2409

if isinstance(server_settings[option], bytes):

2410

server_settings[option] = (server_settings[option]

2411

.decode("utf-8"))

2412

# Force all boolean options to be boolean

2413

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

2414

"foreground", "zeroconf"):

2415

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

2416

# Debug implies foreground

2417

if server_settings["debug"]:

2418

server_settings["foreground"] = True

2038

2419

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

2039

2420

2040

2421

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

2041

2422

2423

if (not server_settings["zeroconf"] and

2424

not (server_settings["port"]

2425

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

2426

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

2427

" Zeroconf")

2428

2042

2429

# For convenience

2043

2430

debug = server_settings["debug"]

2044

2431

debuglevel = server_settings["debuglevel"]

2046

2433

use_ipv6 = server_settings["use_ipv6"]

2047

2434

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

2048

2435

stored_state_file)

2436

foreground = server_settings["foreground"]

2437

zeroconf = server_settings["zeroconf"]

2049

2438

2050

2439

if debug:

2051

initlogger(logging.DEBUG)

2440

initlogger(debug, logging.DEBUG)

2052

2441

else:

2053

2442

if not debuglevel:

2054

initlogger()

2443

initlogger(debug)

2055

2444

else:

2056

2445

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

2057

initlogger(level)

2446

initlogger(debug, level)

2058

2447

2059

2448

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

2060

2449

syslogger.setFormatter(logging.Formatter

2061

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

2062

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

2063

% server_settings["servicename"]))

2450

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

2451

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

2452

.format(server_settings

2453

["servicename"])))

2064

2454

2065

2455

# Parse config file with clients

2066

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

2067

"extended_timeout": "15m",

2068

"interval": "2m",

2069

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

2070

"host": "",

2071

"approval_delay": "0s",

2072

"approval_duration": "1s",

2073

}

2074

client_config = configparser.SafeConfigParser(client_defaults)

2456

client_config = configparser.SafeConfigParser(Client

2457

.client_defaults)

2075

2458

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

2076

2459

"clients.conf"))

2077

2460

2078

2461

global mandos_dbus_service

2079

2462

mandos_dbus_service = None

2080

2463

2464

socketfd = None

2465

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

2466

socketfd = server_settings["socket"]

2081

2467

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

2082

2468

server_settings["port"]),

2083

2469

ClientHandler,

2086

2472

use_ipv6=use_ipv6,

2087

2473

gnutls_priority=

2088

2474

server_settings["priority"],

2089

use_dbus=use_dbus)

2090

if not debug:

2091

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

2475

use_dbus=use_dbus,

2476

socketfd=socketfd)

2477

if not foreground:

2478

pidfilename = "/run/mandos.pid"

2479

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

2480

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

2481

pidfile = None

2092

2482

try:

2093

2483

pidfile = open(pidfilename, "w")

2094

except IOError:

2095

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

2484

except IOError as e:

2485

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

2486

exc_info=e)

2096

2487

2097

try:

2098

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

2099

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

2100

except KeyError:

2488

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

2101

2489

try:

2102

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

2103

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

2490

uid = pwd.getpwnam(name).pw_uid

2491

gid = pwd.getpwnam(name).pw_gid

2492

break

2104

2493

except KeyError:

2105

try:

2106

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

2107

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

2108

except KeyError:

2109

uid = 65534

2110

gid = 65534

2494

continue

2495

else:

2496

uid = 65534

2497

gid = 65534

2111

2498

try:

2112

2499

os.setgid(gid)

2113

2500

os.setuid(uid)

2114

2501

except OSError as error:

2115

if error[0] != errno.EPERM:

2116

raise error

2502

if error.errno != errno.EPERM:

2503

raise

2117

2504

2118

2505

if debug:

2119

2506

# Enable all possible GnuTLS debugging

2130

2517

.gnutls_global_set_log_function(debug_gnutls))

2131

2518

2132

2519

# Redirect stdin so all checkers get /dev/null

2133

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

2520

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

2134

2521

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

2135

2522

if null > 2:

2136

2523

os.close(null)

2137

else:

2138

# No console logging

2139

logger.removeHandler(console)

2140

2524

2141

2525

# Need to fork before connecting to D-Bus

2142

if not debug:

2526

if not foreground:

2143

2527

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

2144

2528

daemon()

2145

2529

2530

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

2531

# need to inform gobject that threads will be used.

2532

gobject.threads_init()

2533

2146

2534

global main_loop

2147

2535

# From the Avahi example code

2148

DBusGMainLoop(set_as_default=True )

2536

DBusGMainLoop(set_as_default=True)

2149

2537

main_loop = gobject.MainLoop()

2150

2538

bus = dbus.SystemBus()

2151

2539

# End of Avahi example code

2157

2545

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

2158

2546

do_not_queue=True))

2159

2547

except dbus.exceptions.NameExistsException as e:

2160

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

2548

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

2161

2549

use_dbus = False

2162

2550

server_settings["use_dbus"] = False

2163

2551

tcp_server.use_dbus = False

2164

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2165

service = AvahiServiceToSyslog(name =

2166

server_settings["servicename"],

2167

servicetype = "_mandos._tcp",

2168

protocol = protocol, bus = bus)

2169

if server_settings["interface"]:

2170

service.interface = (if_nametoindex

2171

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

2552

if zeroconf:

2553

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2554

service = AvahiServiceToSyslog(name =

2555

server_settings["servicename"],

2556

servicetype = "_mandos._tcp",

2557

protocol = protocol, bus = bus)

2558

if server_settings["interface"]:

2559

service.interface = (if_nametoindex

2560

(server_settings["interface"]

2561

.encode("utf-8")))

2172

2562

2173

2563

global multiprocessing_manager

2174

2564

multiprocessing_manager = multiprocessing.Manager()

2175

2565

2176

2566

client_class = Client

2177

2567

if use_dbus:

2178

client_class = functools.partial(ClientDBusTransitional,

2179

bus = bus)

2180

2181

special_settings = {

2182

# Some settings need to be accessd by special methods;

2183

# booleans need .getboolean(), etc. Here is a list of them:

2184

"approved_by_default":

2185

lambda section:

2186

client_config.getboolean(section, "approved_by_default"),

2187

"enabled":

2188

lambda section:

2189

client_config.getboolean(section, "enabled"),

2190

}

2191

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

2192

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

2193

# with exceptions for any special settings as defined above

2194

client_settings = dict((clientname,

2195

dict((setting,

2196

(value

2197

if setting not in special_settings

2198

else special_settings[setting]

2199

(clientname)))

2200

for setting, value in

2201

client_config.items(clientname)))

2202

for clientname in client_config.sections())

2203

2568

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

2569

2570

client_settings = Client.config_parser(client_config)

2204

2571

old_client_settings = {}

2205

clients_data = []

2572

clients_data = {}

2573

2574

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

2575

global wnull

2576

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

2577

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

2578

# mode

2579

if debug or not foreground:

2580

wnull.close()

2206

2581

2207

2582

# Get client data and settings from last running state.

2208

2583

if server_settings["restore"]:

2212

2587

(stored_state))

2213

2588

os.remove(stored_state_path)

2214

2589

except IOError as e:

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2590

if e.errno == errno.ENOENT:

2591

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

2592

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

2593

else:

2594

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

2595

exc_info=e)

2218

2596

raise

2597

except EOFError as e:

2598

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

2599

"EOFError:", exc_info=e)

2219

2600

2220

with Crypto() as crypt:

2221

for client in clients_data:

2222

client_name = client["name"]

2601

with PGPEngine() as pgp:

2602

for client_name, client in clients_data.items():

2603

# Skip removed clients

2604

if client_name not in client_settings:

2605

continue

2223

2606

2224

2607

# Decide which value to use after restoring saved state.

2225

2608

# We have three different values: Old config file,

2234

2617

if (name != "secret" and

2235

2618

value != old_client_settings[client_name]

2236

2619

[name]):

2237

setattr(client, name, value)

2620

client[name] = value

2238

2621

except KeyError:

2239

2622

pass

2240

2623

2241

2624

# Clients who has passed its expire date can still be

2242

# enabled if its last checker was sucessful. Clients

2243

# whose checker failed before we stored its state is

2244

# assumed to have failed all checkers during downtime.

2245

if client["enabled"] and client["last_checked_ok"]:

2246

if ((datetime.datetime.utcnow()

2247

- client["last_checked_ok"])

2248

> client["interval"]):

2249

if client["last_checker_status"] != 0:

2625

# enabled if its last checker was successful. Clients

2626

# whose checker succeeded before we stored its state is

2627

# assumed to have successfully run all checkers during

2628

# downtime.

2629

if client["enabled"]:

2630

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

2631

if not client["last_checked_ok"]:

2632

logger.warning(

2633

"disabling client {} - Client never "

2634

"performed a successful checker"

2635

.format(client_name))

2636

client["enabled"] = False

2637

elif client["last_checker_status"] != 0:

2638

logger.warning(

2639

"disabling client {} - Client last"

2640

" checker failed with error code {}"

2641

.format(client_name,

2642

client["last_checker_status"]))

2250

2643

client["enabled"] = False

2251

2644

else:

2252

2645

client["expires"] = (datetime.datetime

2253

2646

.utcnow()

2254

2647

+ client["timeout"])

2255

2256

client["changedstate"] = (multiprocessing_manager

2257

.Condition

2258

(multiprocessing_manager

2259

.Lock()))

2260

if use_dbus:

2261

new_client = (ClientDBusTransitional.__new__

2262

(ClientDBusTransitional))

2263

tcp_server.clients[client_name] = new_client

2264

new_client.bus = bus

2265

for name, value in client.iteritems():

2266

setattr(new_client, name, value)

2267

client_object_name = unicode(client_name).translate(

2268

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

2269

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

2270

new_client.dbus_object_path = (dbus.ObjectPath

2271

("/clients/"

2272

+ client_object_name))

2273

DBusObjectWithProperties.__init__(new_client,

2274

new_client.bus,

2275

new_client

2276

.dbus_object_path)

2277

else:

2278

tcp_server.clients[client_name] = (Client.__new__

2279

(Client))

2280

for name, value in client.iteritems():

2281

setattr(tcp_server.clients[client_name],

2282

name, value)

2283

2648

logger.debug("Last checker succeeded,"

2649

" keeping {} enabled"

2650

.format(client_name))

2284

2651

try:

2285

tcp_server.clients[client_name].secret = (

2286

crypt.decrypt(tcp_server.clients[client_name]

2287

.encrypted_secret,

2288

client_settings[client_name]

2289

["secret"]))

2290

except CryptoError:

2652

client["secret"] = (

2653

pgp.decrypt(client["encrypted_secret"],

2654

client_settings[client_name]

2655

["secret"]))

2656

except PGPError:

2291

2657

# If decryption fails, we use secret from new settings

2292

tcp_server.clients[client_name].secret = (

2658

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

2659

.format(client_name))

2660

client["secret"] = (

2293

2661

client_settings[client_name]["secret"])

2294

2662

2295

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

2296

for clientname in set(old_client_settings) - set(client_settings):

2297

del tcp_server.clients[clientname]

2298

for clientname in set(client_settings) - set(old_client_settings):

2299

tcp_server.clients[clientname] = (client_class(name

2300

= clientname,

2301

config =

2302

client_settings

2303

[clientname]))

2663

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

2664

for client_name in (set(old_client_settings)

2665

- set(client_settings)):

2666

del clients_data[client_name]

2667

for client_name in (set(client_settings)

2668

- set(old_client_settings)):

2669

clients_data[client_name] = client_settings[client_name]

2670

2671

# Create all client objects

2672

for client_name, client in clients_data.items():

2673

tcp_server.clients[client_name] = client_class(

2674

name = client_name, settings = client,

2675

server_settings = server_settings)

2304

2676

2305

2677

if not tcp_server.clients:

2306

2678

logger.warning("No clients defined")

2307

2308

if not debug:

2309

try:

2310

with pidfile:

2311

pid = os.getpid()

2312

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

2313

del pidfile

2314

except IOError:

2315

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

2316

pidfilename, pid)

2317

except NameError:

2318

# "pidfile" was never created

2319

pass

2679

2680

if not foreground:

2681

if pidfile is not None:

2682

try:

2683

with pidfile:

2684

pid = os.getpid()

2685

pidfile.write("{}\n".format(pid).encode("utf-8"))

2686

except IOError:

2687

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

2688

pidfilename, pid)

2689

del pidfile

2320

2690

del pidfilename

2321

2322

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

2323

2691

2324

2692

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

2325

2693

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

2326

2694

2327

2695

if use_dbus:

2328

class MandosDBusService(dbus.service.Object):

2696

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

2697

"se.bsnet.fukt.Mandos"})

2698

class MandosDBusService(DBusObjectWithProperties):

2329

2699

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

2330

2700

def __init__(self):

2331

2701

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

2332

2702

_interface = "se.recompile.Mandos"

2333

2703

2704

@dbus_interface_annotations(_interface)

2705

def _foo(self):

2706

return { "org.freedesktop.DBus.Property"

2707

".EmitsChangedSignal":

2708

"false"}

2709

2334

2710

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

2335

2711

def ClientAdded(self, objpath):

2336

2712

"D-Bus signal"

2358

2734

def GetAllClientsWithProperties(self):

2359

2735

"D-Bus method"

2360

2736

return dbus.Dictionary(

2361

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

2362

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

2737

{ c.dbus_object_path: c.GetAll("")

2738

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

2363

2739

signature="oa{sv}")

2364

2740

2365

2741

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

2378

2754

2379

2755

del _interface

2380

2756

2381

class MandosDBusServiceTransitional(MandosDBusService):

2382

__metaclass__ = AlternateDBusNamesMetaclass

2383

mandos_dbus_service = MandosDBusServiceTransitional()

2757

mandos_dbus_service = MandosDBusService()

2384

2758

2385

2759

def cleanup():

2386

2760

"Cleanup function; run on exit"

2387

service.cleanup()

2761

if zeroconf:

2762

service.cleanup()

2388

2763

2389

2764

multiprocessing.active_children()

2765

wnull.close()

2390

2766

if not (tcp_server.clients or client_settings):

2391

2767

return

2392

2768

2393

2769

# Store client before exiting. Secrets are encrypted with key

2394

2770

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

2395

2771

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

2396

clients = []

2397

with Crypto() as crypt:

2772

clients = {}

2773

with PGPEngine() as pgp:

2398

2774

for client in tcp_server.clients.itervalues():

2399

2775

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

2400

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

2401

key)

2776

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

2777

key)

2402

2778

client_dict = {}

2403

2779

2404

# A list of attributes that will not be stored when

2405

# shutting down.

2406

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

2780

# A list of attributes that can not be pickled

2781

# + secret.

2782

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

2783

"checker", "server_settings" }

2407

2784

for name, typ in (inspect.getmembers

2408

2785

(dbus.service.Object)):

2409

2786

exclude.add(name)

2414

2791

if attr not in exclude:

2415

2792

client_dict[attr] = getattr(client, attr)

2416

2793

2417

clients.append(client_dict)

2794

clients[client.name] = client_dict

2418

2795

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

2419

2796

2420

2797

try:

2421

with os.fdopen(os.open(stored_state_path,

2422

os.O_CREAT|os.O_WRONLY|os.O_TRUNC,

2423

0600), "wb") as stored_state:

2798

with (tempfile.NamedTemporaryFile

2799

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

2800

dir=os.path.dirname(stored_state_path),

2801

delete=False)) as stored_state:

2424

2802

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

2803

tempname=stored_state.name

2804

os.rename(tempname, stored_state_path)

2425

2805

except (IOError, OSError) as e:

2426

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

2427

.format(e))

2428

if e.errno not in (errno.ENOENT, errno.EACCES):

2806

if not debug:

2807

try:

2808

os.remove(tempname)

2809

except NameError:

2810

pass

2811

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

2812

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

2813

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

2814

else:

2815

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

2816

exc_info=e)

2429

2817

raise

2430

2818

2431

2819

# Delete all clients, and settings from config

2456

2844

tcp_server.server_activate()

2457

2845

2458

2846

# Find out what port we got

2459

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

2847

if zeroconf:

2848

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

2460

2849

if use_ipv6:

2461

2850

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

2462

" flowinfo %d, scope_id %d"

2463

% tcp_server.socket.getsockname())

2851

" flowinfo %d, scope_id %d",

2852

*tcp_server.socket.getsockname())

2464

2853

else: # IPv4

2465

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

2466

% tcp_server.socket.getsockname())

2854

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

2855

*tcp_server.socket.getsockname())

2467

2856

2468

2857

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

2469

2858

2470

2859

try:

2471

# From the Avahi example code

2472

try:

2473

service.activate()

2474

except dbus.exceptions.DBusException as error:

2475

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

2476

cleanup()

2477

sys.exit(1)

2478

# End of Avahi example code

2860

if zeroconf:

2861

# From the Avahi example code

2862

try:

2863

service.activate()

2864

except dbus.exceptions.DBusException as error:

2865

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

2866

cleanup()

2867

sys.exit(1)

2868

# End of Avahi example code

2479

2869

2480

2870

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

2481

2871

lambda *args, **kwargs:

2485

2875

logger.debug("Starting main loop")

2486

2876

main_loop.run()

2487

2877

except AvahiError as error:

2488

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

2878

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

2489

2879

cleanup()

2490

2880

sys.exit(1)

2491

2881

except KeyboardInterrupt:

2496

2886

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

2497

2887

cleanup()

2498

2888

2499

2500

2889

if __name__ == '__main__':

2501

2890

main()