/mandos/trunk : revision 729

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

88

version = "1.4.1"

91

version = "1.6.8"

89

92

stored_state_file = "clients.pickle"

90

93

91

94

logger = logging.getLogger()

92

syslogger = (logging.handlers.SysLogHandler

93

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

94

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

95

syslogger = None

95

96

97

try:

97

98

if_nametoindex = (ctypes.cdll.LoadLibrary

103

104

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

104

105

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

105

106

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

106

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

107

interface))

108

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

109

ifreq[16:20])[0]

107

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

108

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

110

109

return interface_index

111

110

112

111

113

112

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

114

113

"""init logger and add loglevel"""

115

114

115

global syslogger

116

syslogger = (logging.handlers.SysLogHandler

117

(facility =

118

logging.handlers.SysLogHandler.LOG_DAEMON,

119

address = "/dev/log"))

116

120

syslogger.setFormatter(logging.Formatter

117

121

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

118

122

' %(message)s'))

136

140

class PGPEngine(object):

137

141

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

138

142

def __init__(self):

139

self.gnupg = GnuPGInterface.GnuPG()

140

143

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

141

self.gnupg = GnuPGInterface.GnuPG()

142

self.gnupg.options.meta_interactive = False

143

self.gnupg.options.homedir = self.tempdir

144

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

145

'--quiet',

146

'--no-use-agent'])

144

self.gnupgargs = ['--batch',

145

'--home', self.tempdir,

146

'--force-mdc',

147

'--quiet',

148

'--no-use-agent']

147

149

148

150

def __enter__(self):

149

151

return self

150

152

151

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

153

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

152

154

self._cleanup()

153

155

return False

154

156

171

173

def password_encode(self, password):

172

174

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

173

175

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

174

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

176

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

177

if len(encoded) > 2048:

178

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

179

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

180

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

181

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

182

return encoded

175

183

176

184

def encrypt(self, data, password):

177

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

178

with open(os.devnull) as devnull:

179

try:

180

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

181

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

182

attach_fhs={'stderr': devnull})

183

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

184

f.write(data)

185

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

186

ciphertext = f.read()

187

proc.wait()

188

except IOError as e:

189

raise PGPError(e)

190

self.gnupg.passphrase = None

185

passphrase = self.password_encode(password)

186

with tempfile.NamedTemporaryFile(dir=self.tempdir

187

) as passfile:

188

passfile.write(passphrase)

189

passfile.flush()

190

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

191

'--passphrase-file',

192

passfile.name]

193

+ self.gnupgargs,

194

stdin = subprocess.PIPE,

195

stdout = subprocess.PIPE,

196

stderr = subprocess.PIPE)

197

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

198

if proc.returncode != 0:

199

raise PGPError(err)

191

200

return ciphertext

192

201

193

202

def decrypt(self, data, password):

194

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

195

with open(os.devnull) as devnull:

196

try:

197

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

198

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

199

attach_fhs={'stderr': devnull})

200

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

201

f.write(data)

202

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

203

decrypted_plaintext = f.read()

204

proc.wait()

205

except IOError as e:

206

raise PGPError(e)

207

self.gnupg.passphrase = None

203

passphrase = self.password_encode(password)

204

with tempfile.NamedTemporaryFile(dir = self.tempdir

205

) as passfile:

206

passfile.write(passphrase)

207

passfile.flush()

208

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

209

'--passphrase-file',

210

passfile.name]

211

+ self.gnupgargs,

212

stdin = subprocess.PIPE,

213

stdout = subprocess.PIPE,

214

stderr = subprocess.PIPE)

215

decrypted_plaintext, err = proc.communicate(input

216

= data)

217

if proc.returncode != 0:

218

raise PGPError(err)

208

219

return decrypted_plaintext

209

220

210

221

211

212

222

class AvahiError(Exception):

213

223

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

214

224

self.value = value

215

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

216

def __unicode__(self):

217

return unicode(repr(self.value))

225

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

226

**kwargs)

218

227

219

228

class AvahiServiceError(AvahiError):

220

229

pass

231

240

Used to optionally bind to the specified interface.

232

241

name: string; Example: 'Mandos'

233

242

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

234

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

243

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

235

244

port: integer; what port to announce

236

245

TXT: list of strings; TXT record for the service

237

246

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

243

252

server: D-Bus Server

244

253

bus: dbus.SystemBus()

245

254

"""

255

246

256

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

247

257

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

248

258

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

261

271

self.server = None

262

272

self.bus = bus

263

273

self.entry_group_state_changed_match = None

274

264

275

def rename(self):

265

276

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

266

277

if self.rename_count >= self.max_renames:

276

287

try:

277

288

self.add()

278

289

except dbus.exceptions.DBusException as error:

279

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

290

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

280

291

self.cleanup()

281

292

os._exit(1)

282

293

self.rename_count += 1

294

283

295

def remove(self):

284

296

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

285

297

if self.entry_group_state_changed_match is not None:

287

299

self.entry_group_state_changed_match = None

288

300

if self.group is not None:

289

301

self.group.Reset()

302

290

303

def add(self):

291

304

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

292

305

self.remove()

309

322

dbus.UInt16(self.port),

310

323

avahi.string_array_to_txt_array(self.TXT))

311

324

self.group.Commit()

325

312

326

def entry_group_state_changed(self, state, error):

313

327

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

314

328

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

321

335

elif state == avahi.ENTRY_GROUP_FAILURE:

322

336

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

323

337

unicode(error))

324

raise AvahiGroupError("State changed: %s"

325

% unicode(error))

338

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

339

.format(error))

340

326

341

def cleanup(self):

327

342

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

328

343

if self.group is not None:

333

348

pass

334

349

self.group = None

335

350

self.remove()

351

336

352

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

337

353

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

338

354

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

357

373

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

358

374

else:

359

375

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

376

360

377

def activate(self):

361

378

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

362

379

if self.server is None:

369

386

self.server_state_changed)

370

387

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

371

388

389

372

390

class AvahiServiceToSyslog(AvahiService):

373

391

def rename(self):

374

392

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

375

393

ret = AvahiService.rename(self)

376

394

syslogger.setFormatter(logging.Formatter

377

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

378

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

379

% self.name))

395

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

396

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

397

.format(self.name)))

380

398

return ret

381

399

382

def timedelta_to_milliseconds(td):

383

"Convert a datetime.timedelta() to milliseconds"

384

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

385

+ (td.seconds * 1000)

386

+ (td.microseconds // 1000))

387

400

388

401

class Client(object):

389

402

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

390

403

415

428

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

416

429

last_checker_status: integer between 0 and 255 reflecting exit

417

430

status of last checker. -1 reflects crashed

418

checker, or None.

431

checker, -2 means no checker completed yet.

419

432

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

420

433

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

421

434

D-Bus identifiers

422

435

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

423

436

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

424

437

until this client is disabled

425

extended_timeout: extra long timeout when password has been sent

438

extended_timeout: extra long timeout when secret has been sent

426

439

runtime_expansions: Allowed attributes for runtime expansion.

427

440

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

428

441

disabled, or None

442

server_settings: The server_settings dict from main()

429

443

"""

430

444

431

445

runtime_expansions = ("approval_delay", "approval_duration",

432

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

433

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

446

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

447

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

448

"last_approval_request", "last_checked_ok",

434

449

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

435

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

436

"extended_timeout": "15m",

437

"interval": "2m",

450

client_defaults = { "timeout": "PT5M",

451

"extended_timeout": "PT15M",

452

"interval": "PT2M",

438

453

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

439

454

"host": "",

440

"approval_delay": "0s",

441

"approval_duration": "1s",

455

"approval_delay": "PT0S",

456

"approval_duration": "PT1S",

442

457

"approved_by_default": "True",

443

458

"enabled": "True",

444

459

}

445

460

446

def timeout_milliseconds(self):

447

"Return the 'timeout' attribute in milliseconds"

448

return timedelta_to_milliseconds(self.timeout)

449

450

def extended_timeout_milliseconds(self):

451

"Return the 'extended_timeout' attribute in milliseconds"

452

return timedelta_to_milliseconds(self.extended_timeout)

453

454

def interval_milliseconds(self):

455

"Return the 'interval' attribute in milliseconds"

456

return timedelta_to_milliseconds(self.interval)

457

458

def approval_delay_milliseconds(self):

459

return timedelta_to_milliseconds(self.approval_delay)

460

461

@staticmethod

462

def config_parser(config):

463

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

463

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

464

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

465

with exceptions for any special settings as defined above"""

465

with exceptions for any special settings as defined above.

466

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

467

value given the same arguments.

468

"""

466

469

settings = {}

467

470

for client_name in config.sections():

468

471

section = dict(config.items(client_name))

472

475

# Reformat values from string types to Python types

473

476

client["approved_by_default"] = config.getboolean(

474

477

client_name, "approved_by_default")

475

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

478

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

479

"enabled")

476

480

477

481

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

478

482

.replace(" ", ""))

484

488

"rb") as secfile:

485

489

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

486

490

else:

487

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

488

% section)

491

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

492

.format(section))

489

493

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

490

494

client["extended_timeout"] = string_to_delta(

491

495

section["extended_timeout"])

497

501

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

498

502

client["last_approval_request"] = None

499

503

client["last_checked_ok"] = None

500

client["last_checker_status"] = None

501

if client["enabled"]:

502

client["last_enabled"] = datetime.datetime.utcnow()

503

client["expires"] = (datetime.datetime.utcnow()

504

+ client["timeout"])

505

else:

506

client["last_enabled"] = None

507

client["expires"] = None

508

504

client["last_checker_status"] = -2

505

509

506

return settings

510

511

512

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

513

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

514

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

515

attribute."""

507

508

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

516

509

self.name = name

510

if server_settings is None:

511

server_settings = {}

512

self.server_settings = server_settings

517

513

# adding all client settings

518

for setting, value in settings.iteritems():

514

for setting, value in settings.items():

519

515

setattr(self, setting, value)

520

516

517

if self.enabled:

518

if not hasattr(self, "last_enabled"):

519

self.last_enabled = datetime.datetime.utcnow()

520

if not hasattr(self, "expires"):

521

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

522

+ self.timeout)

523

else:

524

self.last_enabled = None

525

self.expires = None

526

521

527

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

522

528

# Uppercase and remove spaces from fingerprint for later

523

529

# comparison purposes with return value from the fingerprint()

524

530

# function

525

531

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

526

self.created = settings.get("created", datetime.datetime.utcnow())

527

532

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

533

datetime.datetime.utcnow())

534

528

535

# attributes specific for this server instance

529

536

self.checker = None

530

537

self.checker_initiator_tag = None

558

565

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

559

566

# Already enabled

560

567

return

561

self.send_changedstate()

562

568

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

563

569

self.enabled = True

564

570

self.last_enabled = datetime.datetime.utcnow()

565

571

self.init_checker()

572

self.send_changedstate()

566

573

567

574

def disable(self, quiet=True):

568

575

"""Disable this client."""

569

576

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

570

577

return False

571

578

if not quiet:

572

self.send_changedstate()

573

if not quiet:

574

579

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

575

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

580

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

576

581

gobject.source_remove(self.disable_initiator_tag)

577

582

self.disable_initiator_tag = None

578

583

self.expires = None

579

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

584

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

580

585

gobject.source_remove(self.checker_initiator_tag)

581

586

self.checker_initiator_tag = None

582

587

self.stop_checker()

583

588

self.enabled = False

589

if not quiet:

590

self.send_changedstate()

584

591

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

585

592

return False

586

593

590

597

def init_checker(self):

591

598

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

592

599

# and every interval from then on.

600

if self.checker_initiator_tag is not None:

601

gobject.source_remove(self.checker_initiator_tag)

593

602

self.checker_initiator_tag = (gobject.timeout_add

594

(self.interval_milliseconds(),

603

(int(self.interval

604

.total_seconds() * 1000),

595

605

self.start_checker))

596

606

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

607

if self.disable_initiator_tag is not None:

608

gobject.source_remove(self.disable_initiator_tag)

597

609

self.disable_initiator_tag = (gobject.timeout_add

598

(self.timeout_milliseconds(),

599

self.disable))

610

(int(self.timeout

611

.total_seconds() * 1000),

612

self.disable))

600

613

# Also start a new checker *right now*.

601

614

self.start_checker()

602

615

618

631

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

619

632

vars(self))

620

633

621

def checked_ok(self, timeout=None):

622

"""Bump up the timeout for this client.

623

624

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

625

alive and well.

626

"""

634

def checked_ok(self):

635

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

636

self.last_checked_ok = datetime.datetime.utcnow()

637

self.last_checker_status = 0

638

self.bump_timeout()

639

640

def bump_timeout(self, timeout=None):

641

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

627

642

if timeout is None:

628

643

timeout = self.timeout

629

self.last_checked_ok = datetime.datetime.utcnow()

630

644

if self.disable_initiator_tag is not None:

631

645

gobject.source_remove(self.disable_initiator_tag)

646

self.disable_initiator_tag = None

632

647

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

633

648

self.disable_initiator_tag = (gobject.timeout_add

634

(timedelta_to_milliseconds

635

(timeout), self.disable))

649

(int(timeout.total_seconds()

650

* 1000), self.disable))

636

651

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

637

652

638

653

def need_approval(self):

644

659

If a checker already exists, leave it running and do

645

660

nothing."""

646

661

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

647

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

648

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

649

# client would inevitably timeout, since no checker would get

650

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

662

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

663

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

664

# would inevitably timeout, since no checker would get a

665

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

651

666

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

652

667

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

653

668

# should be.

655

670

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

656

671

try:

657

672

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

658

except (AttributeError, OSError) as error:

659

if (isinstance(error, OSError)

660

and error.errno != errno.ECHILD):

661

raise error

673

except AttributeError:

674

pass

675

except OSError as error:

676

if error.errno != errno.ECHILD:

677

raise

662

678

else:

663

679

if pid:

664

680

logger.warning("Checker was a zombie")

667

683

self.current_checker_command)

668

684

# Start a new checker if needed

669

685

if self.checker is None:

686

# Escape attributes for the shell

687

escaped_attrs = { attr:

688

re.escape(unicode(getattr(self,

689

attr)))

690

for attr in self.runtime_expansions }

670

691

try:

671

# In case checker_command has exactly one % operator

672

command = self.checker_command % self.host

673

except TypeError:

674

# Escape attributes for the shell

675

escaped_attrs = dict(

676

(attr,

677

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

678

errors=

679

'replace')))

680

for attr in

681

self.runtime_expansions)

682

683

try:

684

command = self.checker_command % escaped_attrs

685

except TypeError as error:

686

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

687

' %s', self.checker_command, error)

688

return True # Try again later

692

command = self.checker_command % escaped_attrs

693

except TypeError as error:

694

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

695

self.checker_command, exc_info=error)

696

return True # Try again later

689

697

self.current_checker_command = command

690

698

try:

691

699

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

694

702

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

695

703

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

696

704

# always replaced by /dev/null.)

705

# The exception is when not debugging but nevertheless

706

# running in the foreground; use the previously

707

# created wnull.

708

popen_args = {}

709

if (not self.server_settings["debug"]

710

and self.server_settings["foreground"]):

711

popen_args.update({"stdout": wnull,

712

"stderr": wnull })

697

713

self.checker = subprocess.Popen(command,

698

714

close_fds=True,

699

shell=True, cwd="/")

700

self.checker_callback_tag = (gobject.child_watch_add

701

(self.checker.pid,

702

self.checker_callback,

703

data=command))

704

# The checker may have completed before the gobject

705

# watch was added. Check for this.

715

shell=True, cwd="/",

716

**popen_args)

717

except OSError as error:

718

logger.error("Failed to start subprocess",

719

exc_info=error)

720

return True

721

self.checker_callback_tag = (gobject.child_watch_add

722

(self.checker.pid,

723

self.checker_callback,

724

data=command))

725

# The checker may have completed before the gobject

726

# watch was added. Check for this.

727

try:

706

728

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

707

if pid:

708

gobject.source_remove(self.checker_callback_tag)

709

self.checker_callback(pid, status, command)

710

729

except OSError as error:

711

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

712

error)

730

if error.errno == errno.ECHILD:

731

# This should never happen

732

logger.error("Child process vanished",

733

exc_info=error)

734

return True

735

raise

736

if pid:

737

gobject.source_remove(self.checker_callback_tag)

738

self.checker_callback(pid, status, command)

713

739

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

714

740

return True

715

741

722

748

return

723

749

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

724

750

try:

725

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

751

self.checker.terminate()

726

752

#time.sleep(0.5)

727

753

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

728

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

754

# self.checker.kill()

729

755

except OSError as error:

730

756

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

731

757

raise

748

774

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

749

775

if byte_arrays and signature != "ay":

750

776

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

751

" signature %r" % signature)

777

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

752

778

def decorator(func):

753

779

func._dbus_is_property = True

754

780

func._dbus_interface = dbus_interface

762

788

return decorator

763

789

764

790

791

def dbus_interface_annotations(dbus_interface):

792

"""Decorator for marking functions returning interface annotations

793

794

Usage:

795

796

@dbus_interface_annotations("org.example.Interface")

797

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

798

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

799

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

800

"false"}

801

"""

802

def decorator(func):

803

func._dbus_is_interface = True

804

func._dbus_interface = dbus_interface

805

func._dbus_name = dbus_interface

806

return func

807

return decorator

808

809

810

def dbus_annotations(annotations):

811

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

812

Usage:

813

814

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

815

access="r")

816

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

817

"org.freedesktop.DBus.Property."

818

"EmitsChangedSignal": "false"})

819

def Property_dbus_property(self):

820

return dbus.Boolean(False)

821

"""

822

def decorator(func):

823

func._dbus_annotations = annotations

824

return func

825

return decorator

826

827

765

828

class DBusPropertyException(dbus.exceptions.DBusException):

766

829

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

767

830

"""

768

def __unicode__(self):

769

return unicode(str(self))

770

831

pass

771

832

772

833

class DBusPropertyAccessException(DBusPropertyException):

773

834

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

790

851

"""

791

852

792

853

@staticmethod

793

def _is_dbus_property(obj):

794

return getattr(obj, "_dbus_is_property", False)

854

def _is_dbus_thing(thing):

855

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

856

857

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

858

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

859

"""

860

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

861

False)

795

862

796

def _get_all_dbus_properties(self):

863

def _get_all_dbus_things(self, thing):

797

864

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

798

865

"""

799

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

866

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

867

name),

868

athing.__get__(self))

800

869

for cls in self.__class__.__mro__

801

for name, prop in

802

inspect.getmembers(cls, self._is_dbus_property))

870

for name, athing in

871

inspect.getmembers(cls,

872

self._is_dbus_thing(thing)))

803

873

804

874

def _get_dbus_property(self, interface_name, property_name):

805

875

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

807

877

"""

808

878

for cls in self.__class__.__mro__:

809

879

for name, value in (inspect.getmembers

810

(cls, self._is_dbus_property)):

880

(cls,

881

self._is_dbus_thing("property"))):

811

882

if (value._dbus_name == property_name

812

883

and value._dbus_interface == interface_name):

813

884

return value.__get__(self)

841

912

# The byte_arrays option is not supported yet on

842

913

# signatures other than "ay".

843

914

if prop._dbus_signature != "ay":

844

raise ValueError

845

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

846

for byte in value))

915

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

916

"'ay' signature {!r}"

917

.format(prop._dbus_signature))

918

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

919

for byte in value))

847

920

prop(value)

848

921

849

922

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

855

928

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

856

929

"""

857

930

properties = {}

858

for name, prop in self._get_all_dbus_properties():

931

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

859

932

if (interface_name

860

933

and interface_name != prop._dbus_interface):

861

934

# Interface non-empty but did not match

876

949

path_keyword='object_path',

877

950

connection_keyword='connection')

878

951

def Introspect(self, object_path, connection):

879

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

952

"""Overloading of standard D-Bus method.

953

954

Inserts property tags and interface annotation tags.

880

955

"""

881

956

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

882

957

connection)

889

964

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

890

965

return e

891

966

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

967

# Add property tags

892

968

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

893

969

for name, prop

894

in self._get_all_dbus_properties()

970

in self._get_all_dbus_things("property")

895

971

if prop._dbus_interface

896

972

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

897

973

if_tag.appendChild(tag)

974

# Add annotation tags

975

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

976

for tag in if_tag.getElementsByTagName(typ):

977

annots = dict()

978

for name, prop in (self.

979

_get_all_dbus_things(typ)):

980

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

981

and prop._dbus_interface

982

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

983

annots.update(getattr

984

(prop,

985

"_dbus_annotations",

986

{}))

987

for name, value in annots.items():

988

ann_tag = document.createElement(

989

"annotation")

990

ann_tag.setAttribute("name", name)

991

ann_tag.setAttribute("value", value)

992

tag.appendChild(ann_tag)

993

# Add interface annotation tags

994

for annotation, value in dict(

995

itertools.chain.from_iterable(

996

annotations().items()

997

for name, annotations in

998

self._get_all_dbus_things("interface")

999

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

1000

)).items():

1001

ann_tag = document.createElement("annotation")

1002

ann_tag.setAttribute("name", annotation)

1003

ann_tag.setAttribute("value", value)

1004

if_tag.appendChild(ann_tag)

898

1005

# Add the names to the return values for the

899

1006

# "org.freedesktop.DBus.Properties" methods

900

1007

if (if_tag.getAttribute("name")

915

1022

except (AttributeError, xml.dom.DOMException,

916

1023

xml.parsers.expat.ExpatError) as error:

917

1024

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

918

error)

1025

exc_info=error)

919

1026

return xmlstring

920

1027

921

1028

922

def datetime_to_dbus (dt, variant_level=0):

1029

def datetime_to_dbus(dt, variant_level=0):

923

1030

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

924

1031

if dt is None:

925

1032

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

927

1034

variant_level=variant_level)

928

1035

929

1036

930

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

931

.__metaclass__):

932

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

933

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

1037

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1038

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

1039

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

1040

interface names according to the "alt_interface_names" mapping.

1041

Usage:

1042

1043

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

1044

"net.example.AlternateInterface"})

1045

class SampleDBusObject(dbus.service.Object):

1046

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

1047

def SampleDBusMethod():

1048

pass

1049

1050

The above "SampleDBusMethod" on "SampleDBusObject" will be

1051

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

1052

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

1053

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

1054

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

1055

1056

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

1057

(from DBusObjectWithProperties) and interfaces (from the

1058

dbus_interface_annotations decorator).

934

1059

"""

935

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

936

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

937

# methods, signals, or properties in them

938

for base in (b for b in bases

939

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

940

# Go though all attributes of the base class

941

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

1060

def wrapper(cls):

1061

for orig_interface_name, alt_interface_name in (

1062

alt_interface_names.items()):

1063

attr = {}

1064

interface_names = set()

1065

# Go though all attributes of the class

1066

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

942

1067

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

943

1068

# with the wrong interface name

944

1069

if (not hasattr(attribute, "_dbus_interface")

945

1070

or not attribute._dbus_interface

946

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

1071

.startswith(orig_interface_name)):

947

1072

continue

948

1073

# Create an alternate D-Bus interface name based on

949

1074

# the current name

950

1075

alt_interface = (attribute._dbus_interface

951

.replace("se.recompile.Mandos",

952

"se.bsnet.fukt.Mandos"))

1076

.replace(orig_interface_name,

1077

alt_interface_name))

1078

interface_names.add(alt_interface)

953

1079

# Is this a D-Bus signal?

954

1080

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

955

# Extract the original non-method function by

956

# black magic

1081

# Extract the original non-method undecorated

1082

# function by black magic

957

1083

nonmethod_func = (dict(

958

1084

zip(attribute.func_code.co_freevars,

959

1085

attribute.__closure__))["func"]

970

1096

nonmethod_func.func_name,

971

1097

nonmethod_func.func_defaults,

972

1098

nonmethod_func.func_closure)))

1099

# Copy annotations, if any

1100

try:

1101

new_function._dbus_annotations = (

1102

dict(attribute._dbus_annotations))

1103

except AttributeError:

1104

pass

973

1105

# Define a creator of a function to call both the

974

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

975

# signals gets sent when the function is called

1106

# original and alternate functions, so both the

1107

# original and alternate signals gets sent when

1108

# the function is called

976

1109

def fixscope(func1, func2):

977

1110

"""This function is a scope container to pass

978

1111

func1 and func2 to the "call_both" function

985

1118

return call_both

986

1119

# Create the "call_both" function and add it to

987

1120

# the class

988

attr[attrname] = fixscope(attribute,

989

new_function)

1121

attr[attrname] = fixscope(attribute, new_function)

990

1122

# Is this a D-Bus method?

991

1123

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

992

1124

# Create a new, but exactly alike, function

1003

1135

attribute.func_name,

1004

1136

attribute.func_defaults,

1005

1137

attribute.func_closure)))

1138

# Copy annotations, if any

1139

try:

1140

attr[attrname]._dbus_annotations = (

1141

dict(attribute._dbus_annotations))

1142

except AttributeError:

1143

pass

1006

1144

# Is this a D-Bus property?

1007

1145

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

1008

1146

# Create a new, but exactly alike, function

1022

1160

attribute.func_name,

1023

1161

attribute.func_defaults,

1024

1162

attribute.func_closure)))

1025

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

1026

1027

1163

# Copy annotations, if any

1164

try:

1165

attr[attrname]._dbus_annotations = (

1166

dict(attribute._dbus_annotations))

1167

except AttributeError:

1168

pass

1169

# Is this a D-Bus interface?

1170

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

1171

# Create a new, but exactly alike, function

1172

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

1173

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

1174

# to the class.

1175

attr[attrname] = (dbus_interface_annotations

1176

(alt_interface)

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1183

if deprecate:

1184

# Deprecate all alternate interfaces

1185

iname="_AlternateDBusNames_interface_annotation{}"

1186

for interface_name in interface_names:

1187

@dbus_interface_annotations(interface_name)

1188

def func(self):

1189

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

1190

"true" }

1191

# Find an unused name

1192

for aname in (iname.format(i)

1193

for i in itertools.count()):

1194

if aname not in attr:

1195

attr[aname] = func

1196

break

1197

if interface_names:

1198

# Replace the class with a new subclass of it with

1199

# methods, signals, etc. as created above.

1200

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

1201

(cls,), attr)

1202

return cls

1203

return wrapper

1204

1205

1206

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

1207

"se.bsnet.fukt.Mandos"})

1028

1208

class ClientDBus(Client, DBusObjectWithProperties):

1029

1209

"""A Client class using D-Bus

1030

1210

1041

1221

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

1042

1222

self.bus = bus

1043

1223

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

1044

self._approvals_pending = 0

1045

1046

self._approvals_pending = 0

1047

1224

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

1048

1225

# the D-Bus

1049

1226

client_object_name = unicode(self.name).translate(

1053

1230

("/clients/" + client_object_name))

1054

1231

DBusObjectWithProperties.__init__(self, self.bus,

1055

1232

self.dbus_object_path)

1056

1233

1057

1234

def notifychangeproperty(transform_func,

1058

1235

dbus_name, type_func=lambda x: x,

1059

1236

variant_level=1):

1067

1244

to the D-Bus. Default: no transform

1068

1245

variant_level: D-Bus variant level. Default: 1

1069

1246

"""

1070

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

1247

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

1071

1248

def setter(self, value):

1072

1249

if hasattr(self, "dbus_object_path"):

1073

1250

if (not hasattr(self, attrname) or

1082

1259

1083

1260

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

1084

1261

1085

1086

1262

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1087

1263

approvals_pending = notifychangeproperty(dbus.Boolean,

1088

1264

"ApprovalPending",

1095

1271

checker is not None)

1096

1272

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1097

1273

"LastCheckedOK")

1274

last_checker_status = notifychangeproperty(dbus.Int16,

1275

"LastCheckerStatus")

1098

1276

last_approval_request = notifychangeproperty(

1099

1277

datetime_to_dbus, "LastApprovalRequest")

1100

1278

approved_by_default = notifychangeproperty(dbus.Boolean,

1102

1280

approval_delay = notifychangeproperty(dbus.UInt64,

1103

1281

"ApprovalDelay",

1104

1282

type_func =

1105

timedelta_to_milliseconds)

1283

lambda td: td.total_seconds()

1284

* 1000)

1106

1285

approval_duration = notifychangeproperty(

1107

1286

dbus.UInt64, "ApprovalDuration",

1108

type_func = timedelta_to_milliseconds)

1287

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

1109

1288

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

1110

1289

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

1111

type_func =

1112

timedelta_to_milliseconds)

1290

type_func = lambda td:

1291

td.total_seconds() * 1000)

1113

1292

extended_timeout = notifychangeproperty(

1114

1293

dbus.UInt64, "ExtendedTimeout",

1115

type_func = timedelta_to_milliseconds)

1294

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

1116

1295

interval = notifychangeproperty(dbus.UInt64,

1117

1296

"Interval",

1118

1297

type_func =

1119

timedelta_to_milliseconds)

1298

lambda td: td.total_seconds()

1299

* 1000)

1120

1300

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

1121

1301

1122

1302

del notifychangeproperty

1150

1330

*args, **kwargs)

1151

1331

1152

1332

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

1153

old_checker = self.checker

1154

if self.checker is not None:

1155

old_checker_pid = self.checker.pid

1156

else:

1157

old_checker_pid = None

1333

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

1158

1334

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

1159

1335

# Only if new checker process was started

1160

1336

if (self.checker is not None

1168

1344

return False

1169

1345

1170

1346

def approve(self, value=True):

1171

self.send_changedstate()

1172

1347

self.approved = value

1173

gobject.timeout_add(timedelta_to_milliseconds

1174

(self.approval_duration),

1175

self._reset_approved)

1176

1348

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

1349

* 1000), self._reset_approved)

1350

self.send_changedstate()

1177

1351

1178

1352

## D-Bus methods, signals & properties

1179

1353

_interface = "se.recompile.Mandos.Client"

1180

1354

1355

## Interfaces

1356

1357

@dbus_interface_annotations(_interface)

1358

def _foo(self):

1359

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

1360

"false"}

1361

1181

1362

## Signals

1182

1363

1183

1364

# CheckerCompleted - signal

1219

1400

"D-Bus signal"

1220

1401

return self.need_approval()

1221

1402

1222

# NeRwequest - signal

1223

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

1224

def NewRequest(self, ip):

1225

"""D-Bus signal

1226

Is sent after a client request a password.

1227

"""

1228

pass

1229

1230

1403

## Methods

1231

1404

1232

1405

# Approve - method

1282

1455

access="readwrite")

1283

1456

def ApprovalDelay_dbus_property(self, value=None):

1284

1457

if value is None: # get

1285

return dbus.UInt64(self.approval_delay_milliseconds())

1458

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

1459

* 1000)

1286

1460

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

1287

1461

1288

1462

# ApprovalDuration - property

1290

1464

access="readwrite")

1291

1465

def ApprovalDuration_dbus_property(self, value=None):

1292

1466

if value is None: # get

1293

return dbus.UInt64(timedelta_to_milliseconds(

1294

self.approval_duration))

1467

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

1468

* 1000)

1295

1469

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

1296

1470

1297

1471

# Name - property

1342

1516

return

1343

1517

return datetime_to_dbus(self.last_checked_ok)

1344

1518

1519

# LastCheckerStatus - property

1520

@dbus_service_property(_interface, signature="n",

1521

access="read")

1522

def LastCheckerStatus_dbus_property(self):

1523

return dbus.Int16(self.last_checker_status)

1524

1345

1525

# Expires - property

1346

1526

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

1347

1527

def Expires_dbus_property(self):

1357

1537

access="readwrite")

1358

1538

def Timeout_dbus_property(self, value=None):

1359

1539

if value is None: # get

1360

return dbus.UInt64(self.timeout_milliseconds())

1540

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

1541

old_timeout = self.timeout

1361

1542

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

1362

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

1363

return

1364

# Reschedule timeout

1365

gobject.source_remove(self.disable_initiator_tag)

1366

self.disable_initiator_tag = None

1367

self.expires = None

1368

time_to_die = timedelta_to_milliseconds((self

1369

.last_checked_ok

1370

+ self.timeout)

1371

- datetime.datetime

1372

.utcnow())

1373

if time_to_die <= 0:

1374

# The timeout has passed

1375

self.disable()

1376

else:

1377

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

1378

+ datetime.timedelta(milliseconds =

1379

time_to_die))

1380

self.disable_initiator_tag = (gobject.timeout_add

1381

(time_to_die, self.disable))

1543

# Reschedule disabling

1544

if self.enabled:

1545

now = datetime.datetime.utcnow()

1546

self.expires += self.timeout - old_timeout

1547

if self.expires <= now:

1548

# The timeout has passed

1549

self.disable()

1550

else:

1551

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

1552

is None):

1553

return

1554

gobject.source_remove(self.disable_initiator_tag)

1555

self.disable_initiator_tag = (

1556

gobject.timeout_add(

1557

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

1558

* 1000), self.disable))

1382

1559

1383

1560

# ExtendedTimeout - property

1384

1561

@dbus_service_property(_interface, signature="t",

1385

1562

access="readwrite")

1386

1563

def ExtendedTimeout_dbus_property(self, value=None):

1387

1564

if value is None: # get

1388

return dbus.UInt64(self.extended_timeout_milliseconds())

1565

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

1566

* 1000)

1389

1567

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

1390

1568

1391

1569

# Interval - property

1393

1571

access="readwrite")

1394

1572

def Interval_dbus_property(self, value=None):

1395

1573

if value is None: # get

1396

return dbus.UInt64(self.interval_milliseconds())

1574

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

1397

1575

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

1398

1576

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

1399

1577

return

1432

1610

@dbus_service_property(_interface, signature="ay",

1433

1611

access="write", byte_arrays=True)

1434

1612

def Secret_dbus_property(self, value):

1435

self.secret = str(value)

1613

self.secret = bytes(value)

1436

1614

1437

1615

del _interface

1438

1616

1463

1641

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

1464

1642

1465

1643

1466

class ClientDBusTransitional(ClientDBus):

1467

__metaclass__ = AlternateDBusNamesMetaclass

1468

1469

1470

1644

class ClientHandler(socketserver.BaseRequestHandler, object):

1471

1645

"""A class to handle client connections.

1472

1646

1508

1682

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

1509

1683

try:

1510

1684

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

1511

raise RuntimeError

1685

raise RuntimeError(line)

1512

1686

except (ValueError, IndexError, RuntimeError) as error:

1513

1687

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

1514

1688

return

1540

1714

except KeyError:

1541

1715

return

1542

1716

1543

if self.server.use_dbus:

1544

# Emit D-Bus signal

1545

client.NewRequest(str(self.client_address))

1546

1547

1717

if client.approval_delay:

1548

1718

delay = client.approval_delay

1549

1719

client.approvals_pending += 1

1567

1737

if self.server.use_dbus:

1568

1738

# Emit D-Bus signal

1569

1739

client.NeedApproval(

1570

client.approval_delay_milliseconds(),

1571

client.approved_by_default)

1740

client.approval_delay.total_seconds()

1741

* 1000, client.approved_by_default)

1572

1742

else:

1573

1743

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

1574

1744

client.name)

1580

1750

#wait until timeout or approved

1581

1751

time = datetime.datetime.now()

1582

1752

client.changedstate.acquire()

1583

(client.changedstate.wait

1584

(float(client.timedelta_to_milliseconds(delay)

1585

/ 1000)))

1753

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

1586

1754

client.changedstate.release()

1587

1755

time2 = datetime.datetime.now()

1588

1756

if (time2 - time) >= delay:

1604

1772

try:

1605

1773

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

1606

1774

except gnutls.errors.GNUTLSError as error:

1607

logger.warning("gnutls send failed")

1775

logger.warning("gnutls send failed",

1776

exc_info=error)

1608

1777

return

1609

1778

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

1610

1779

sent, len(client.secret)

1613

1782

1614

1783

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

1615

1784

# bump the timeout using extended_timeout

1616

client.checked_ok(client.extended_timeout)

1785

client.bump_timeout(client.extended_timeout)

1617

1786

if self.server.use_dbus:

1618

1787

# Emit D-Bus signal

1619

1788

client.GotSecret()

1624

1793

try:

1625

1794

session.bye()

1626

1795

except gnutls.errors.GNUTLSError as error:

1627

logger.warning("GnuTLS bye failed")

1796

logger.warning("GnuTLS bye failed",

1797

exc_info=error)

1628

1798

1629

1799

@staticmethod

1630

1800

def peer_certificate(session):

1702

1872

def process_request(self, request, address):

1703

1873

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

1704

1874

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

1705

args = (request,

1706

address))

1875

args = (request, address))

1707

1876

proc.start()

1708

1877

return proc

1709

1878

1724

1893

1725

1894

def add_pipe(self, parent_pipe, proc):

1726

1895

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

1727

raise NotImplementedError

1896

raise NotImplementedError()

1728

1897

1729

1898

1730

1899

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1737

1906

use_ipv6: Boolean; to use IPv6 or not

1738

1907

"""

1739

1908

def __init__(self, server_address, RequestHandlerClass,

1740

interface=None, use_ipv6=True):

1909

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

1910

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

1911

creating a new one with socket.socket().

1912

"""

1741

1913

self.interface = interface

1742

1914

if use_ipv6:

1743

1915

self.address_family = socket.AF_INET6

1916

if socketfd is not None:

1917

# Save the file descriptor

1918

self.socketfd = socketfd

1919

# Save the original socket.socket() function

1920

self.socket_socket = socket.socket

1921

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

1922

#

1923

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

1924

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

1925

# patching socket.socket.)

1926

#

1927

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

1928

@functools.wraps(socket.socket)

1929

def socket_wrapper(*args, **kwargs):

1930

# Restore original function so subsequent calls are

1931

# not affected.

1932

socket.socket = self.socket_socket

1933

del self.socket_socket

1934

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

1935

# saved file descriptor.

1936

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

1937

# Replace socket.socket() function with wrapper

1938

socket.socket = socket_wrapper

1939

# The socketserver.TCPServer.__init__ will call

1940

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

1941

# socket_wrapper(), if socketfd was set.

1744

1942

socketserver.TCPServer.__init__(self, server_address,

1745

1943

RequestHandlerClass)

1944

1746

1945

def server_bind(self):

1747

1946

"""This overrides the normal server_bind() function

1748

1947

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

1756

1955

try:

1757

1956

self.socket.setsockopt(socket.SOL_SOCKET,

1758

1957

SO_BINDTODEVICE,

1759

str(self.interface

1760

+ '\0'))

1958

(self.interface + "\0")

1959

.encode("utf-8"))

1761

1960

except socket.error as error:

1762

if error[0] == errno.EPERM:

1763

logger.error("No permission to"

1764

" bind to interface %s",

1765

self.interface)

1766

elif error[0] == errno.ENOPROTOOPT:

1961

if error.errno == errno.EPERM:

1962

logger.error("No permission to bind to"

1963

" interface %s", self.interface)

1964

elif error.errno == errno.ENOPROTOOPT:

1767

1965

logger.error("SO_BINDTODEVICE not available;"

1768

1966

" cannot bind to interface %s",

1769

1967

self.interface)

1968

elif error.errno == errno.ENODEV:

1969

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

1970

" cannot bind", self.interface)

1770

1971

else:

1771

1972

raise

1772

1973

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

1775

1976

if self.address_family == socket.AF_INET6:

1776

1977

any_address = "::" # in6addr_any

1777

1978

else:

1778

any_address = socket.INADDR_ANY

1979

any_address = "0.0.0.0" # INADDR_ANY

1779

1980

self.server_address = (any_address,

1780

1981

self.server_address[1])

1781

1982

elif not self.server_address[1]:

1802

2003

"""

1803

2004

def __init__(self, server_address, RequestHandlerClass,

1804

2005

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

1805

gnutls_priority=None, use_dbus=True):

2006

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

1806

2007

self.enabled = False

1807

2008

self.clients = clients

1808

2009

if self.clients is None:

1812

2013

IPv6_TCPServer.__init__(self, server_address,

1813

2014

RequestHandlerClass,

1814

2015

interface = interface,

1815

use_ipv6 = use_ipv6)

2016

use_ipv6 = use_ipv6,

2017

socketfd = socketfd)

1816

2018

def server_activate(self):

1817

2019

if self.enabled:

1818

2020

return socketserver.TCPServer.server_activate(self)

1831

2033

1832

2034

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

1833

2035

proc = None, client_object=None):

1834

condition_names = {

1835

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

1836

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

1837

# blocking).

1838

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

1839

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

1840

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

1841

# broken, usually for pipes and

1842

# sockets).

1843

}

1844

conditions_string = ' | '.join(name

1845

for cond, name in

1846

condition_names.iteritems()

1847

if cond & condition)

1848

2036

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

1849

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

2037

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

1850

2038

# Wait for other process to exit

1851

2039

proc.join()

1852

2040

return False

1910

2098

return True

1911

2099

1912

2100

2101

def rfc3339_duration_to_delta(duration):

2102

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

2103

2104

>>> rfc3339_duration_to_delta("P7D")

2105

datetime.timedelta(7)

2106

>>> rfc3339_duration_to_delta("PT60S")

2107

datetime.timedelta(0, 60)

2108

>>> rfc3339_duration_to_delta("PT60M")

2109

datetime.timedelta(0, 3600)

2110

>>> rfc3339_duration_to_delta("PT24H")

2111

datetime.timedelta(1)

2112

>>> rfc3339_duration_to_delta("P1W")

2113

datetime.timedelta(7)

2114

>>> rfc3339_duration_to_delta("PT5M30S")

2115

datetime.timedelta(0, 330)

2116

>>> rfc3339_duration_to_delta("P1DT3M20S")

2117

datetime.timedelta(1, 200)

2118

"""

2119

2120

# Parsing an RFC 3339 duration with regular expressions is not

2121

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

2122

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

2123

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

2124

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

2125

# avoid excessive use of external libraries.

2126

2127

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

2128

Token = collections.namedtuple("Token",

2129

("regexp", # To match token; if

2130

# "value" is not None,

2131

# must have a "group"

2132

# containing digits

2133

"value", # datetime.timedelta or

2134

# None

2135

"followers")) # Tokens valid after

2136

# this token

2137

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

2138

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

2139

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

2140

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

2141

datetime.timedelta(seconds=1),

2142

frozenset((token_end,)))

2143

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

2144

datetime.timedelta(minutes=1),

2145

frozenset((token_second, token_end)))

2146

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

2147

datetime.timedelta(hours=1),

2148

frozenset((token_minute, token_end)))

2149

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

2150

None,

2151

frozenset((token_hour, token_minute,

2152

token_second)))

2153

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

2154

datetime.timedelta(days=1),

2155

frozenset((token_time, token_end)))

2156

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

2157

datetime.timedelta(weeks=4),

2158

frozenset((token_day, token_end)))

2159

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

2160

datetime.timedelta(weeks=52),

2161

frozenset((token_month, token_end)))

2162

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

2163

datetime.timedelta(weeks=1),

2164

frozenset((token_end,)))

2165

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

2166

frozenset((token_year, token_month,

2167

token_day, token_time,

2168

token_week)))

2169

# Define starting values

2170

value = datetime.timedelta() # Value so far

2171

found_token = None

2172

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

2173

s = duration # String left to parse

2174

# Loop until end token is found

2175

while found_token is not token_end:

2176

# Search for any currently valid tokens

2177

for token in followers:

2178

match = token.regexp.match(s)

2179

if match is not None:

2180

# Token found

2181

if token.value is not None:

2182

# Value found, parse digits

2183

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

2184

# Add to value so far

2185

value += factor * token.value

2186

# Strip token from string

2187

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

2188

# Go to found token

2189

found_token = token

2190

# Set valid next tokens

2191

followers = found_token.followers

2192

break

2193

else:

2194

# No currently valid tokens were found

2195

raise ValueError("Invalid RFC 3339 duration")

2196

# End token found

2197

return value

2198

2199

1913

2200

def string_to_delta(interval):

1914

2201

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

1915

2202

1926

2213

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

1927

2214

datetime.timedelta(0, 330)

1928

2215

"""

2216

2217

try:

2218

return rfc3339_duration_to_delta(interval)

2219

except ValueError:

2220

pass

2221

1929

2222

timevalue = datetime.timedelta(0)

1930

2223

for s in interval.split():

1931

2224

try:

1932

suffix = unicode(s[-1])

2225

suffix = s[-1]

1933

2226

value = int(s[:-1])

1934

2227

if suffix == "d":

1935

2228

delta = datetime.timedelta(value)

1942

2235

elif suffix == "w":

1943

2236

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

1944

2237

else:

1945

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

1946

except (ValueError, IndexError) as e:

2238

raise ValueError("Unknown suffix {!r}"

2239

.format(suffix))

2240

except IndexError as e:

1947

2241

raise ValueError(*(e.args))

1948

2242

timevalue += delta

1949

2243

return timevalue

1962

2256

sys.exit()

1963

2257

if not noclose:

1964

2258

# Close all standard open file descriptors

1965

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

2259

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

1966

2260

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

1967

raise OSError(errno.ENODEV,

1968

"%s not a character device"

1969

% os.path.devnull)

2261

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

2262

.format(os.devnull))

1970

2263

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

1971

2264

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

1972

2265

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

1981

2274

1982

2275

parser = argparse.ArgumentParser()

1983

2276

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

1984

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

2277

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

1985

2278

help="show version number and exit")

1986

2279

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

1987

2280

help="Bind to interface IF")

1993

2286

help="Run self-test")

1994

2287

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

1995

2288

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

1996

" to terminal")

2289

" to terminal", default=None)

1997

2290

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

1998

2291

help="Debug level for stdout output")

1999

2292

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

2006

2299

" files")

2007

2300

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

2008

2301

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

2009

" system bus interface")

2302

" system bus interface", default=None)

2010

2303

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

2011

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

2304

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

2305

default=None)

2012

2306

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

2013

2307

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

2014

" state")

2308

" state", default=None)

2309

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

2310

help="Specify a file descriptor to a network"

2311

" socket to use instead of creating one")

2015

2312

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

2016

2313

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

2314

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

2315

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

2316

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

2317

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

2318

default=None)

2017

2319

2018

2320

options = parser.parse_args()

2019

2321

2020

2322

if options.check:

2021

2323

import doctest

2022

doctest.testmod()

2023

sys.exit()

2324

fail_count, test_count = doctest.testmod()

2325

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

2024

2326

2025

2327

# Default values for config file for server-global settings

2026

2328

server_defaults = { "interface": "",

2028

2330

"port": "",

2029

2331

"debug": "False",

2030

2332

"priority":

2031

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

2333

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

2032

2334

"servicename": "Mandos",

2033

2335

"use_dbus": "True",

2034

2336

"use_ipv6": "True",

2035

2337

"debuglevel": "",

2036

2338

"restore": "True",

2037

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

2339

"socket": "",

2340

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

2341

"foreground": "False",

2342

"zeroconf": "True",

2038

2343

}

2039

2344

2040

2345

# Parse config file for server-global settings

2045

2350

# Convert the SafeConfigParser object to a dict

2046

2351

server_settings = server_config.defaults()

2047

2352

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

2048

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

2353

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

2049

2354

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

2050

2355

option)

2051

2356

if server_settings["port"]:

2052

2357

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

2053

2358

"port")

2359

if server_settings["socket"]:

2360

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

2361

"socket")

2362

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

2363

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

2364

# happen with a supplied network socket.

2365

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

2366

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

2367

["socket"])

2054

2368

del server_config

2055

2369

2056

2370

# Override the settings from the config file with command line

2058

2372

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

2059

2373

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

2060

2374

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

2061

"statedir"):

2375

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

2062

2376

value = getattr(options, option)

2063

2377

if value is not None:

2064

2378

server_settings[option] = value

2065

2379

del options

2066

2380

# Force all strings to be unicode

2067

2381

for option in server_settings.keys():

2068

if type(server_settings[option]) is str:

2069

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

2382

if isinstance(server_settings[option], bytes):

2383

server_settings[option] = (server_settings[option]

2384

.decode("utf-8"))

2385

# Force all boolean options to be boolean

2386

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

2387

"foreground", "zeroconf"):

2388

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

2389

# Debug implies foreground

2390

if server_settings["debug"]:

2391

server_settings["foreground"] = True

2070

2392

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

2071

2393

2072

2394

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

2073

2395

2396

if (not server_settings["zeroconf"] and

2397

not (server_settings["port"]

2398

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

2399

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

2400

" Zeroconf")

2401

2074

2402

# For convenience

2075

2403

debug = server_settings["debug"]

2076

2404

debuglevel = server_settings["debuglevel"]

2078

2406

use_ipv6 = server_settings["use_ipv6"]

2079

2407

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

2080

2408

stored_state_file)

2409

foreground = server_settings["foreground"]

2410

zeroconf = server_settings["zeroconf"]

2081

2411

2082

2412

if debug:

2083

2413

initlogger(debug, logging.DEBUG)

2090

2420

2091

2421

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

2092

2422

syslogger.setFormatter(logging.Formatter

2093

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

2094

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

2095

% server_settings["servicename"]))

2423

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

2424

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

2425

.format(server_settings

2426

["servicename"])))

2096

2427

2097

2428

# Parse config file with clients

2098

client_config = configparser.SafeConfigParser(Client.client_defaults)

2429

client_config = configparser.SafeConfigParser(Client

2430

.client_defaults)

2099

2431

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

2100

2432

"clients.conf"))

2101

2433

2102

2434

global mandos_dbus_service

2103

2435

mandos_dbus_service = None

2104

2436

2437

socketfd = None

2438

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

2439

socketfd = server_settings["socket"]

2105

2440

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

2106

2441

server_settings["port"]),

2107

2442

ClientHandler,

2110

2445

use_ipv6=use_ipv6,

2111

2446

gnutls_priority=

2112

2447

server_settings["priority"],

2113

use_dbus=use_dbus)

2114

if not debug:

2115

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

2448

use_dbus=use_dbus,

2449

socketfd=socketfd)

2450

if not foreground:

2451

pidfilename = "/run/mandos.pid"

2452

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

2453

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

2454

pidfile = None

2116

2455

try:

2117

2456

pidfile = open(pidfilename, "w")

2118

except IOError:

2119

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

2457

except IOError as e:

2458

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

2459

exc_info=e)

2120

2460

2121

try:

2122

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

2123

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

2124

except KeyError:

2461

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

2125

2462

try:

2126

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

2127

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

2463

uid = pwd.getpwnam(name).pw_uid

2464

gid = pwd.getpwnam(name).pw_gid

2465

break

2128

2466

except KeyError:

2129

try:

2130

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

2131

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

2132

except KeyError:

2133

uid = 65534

2134

gid = 65534

2467

continue

2468

else:

2469

uid = 65534

2470

gid = 65534

2135

2471

try:

2136

2472

os.setgid(gid)

2137

2473

os.setuid(uid)

2138

2474

except OSError as error:

2139

if error[0] != errno.EPERM:

2140

raise error

2475

if error.errno != errno.EPERM:

2476

raise

2141

2477

2142

2478

if debug:

2143

2479

# Enable all possible GnuTLS debugging

2154

2490

.gnutls_global_set_log_function(debug_gnutls))

2155

2491

2156

2492

# Redirect stdin so all checkers get /dev/null

2157

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

2493

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

2158

2494

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

2159

2495

if null > 2:

2160

2496

os.close(null)

2161

2497

2162

2498

# Need to fork before connecting to D-Bus

2163

if not debug:

2499

if not foreground:

2164

2500

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

2165

2501

daemon()

2166

2502

2503

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

2504

# need to inform gobject that threads will be used.

2167

2505

gobject.threads_init()

2168

2506

2169

2507

global main_loop

2170

2508

# From the Avahi example code

2171

DBusGMainLoop(set_as_default=True )

2509

DBusGMainLoop(set_as_default=True)

2172

2510

main_loop = gobject.MainLoop()

2173

2511

bus = dbus.SystemBus()

2174

2512

# End of Avahi example code

2180

2518

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

2181

2519

do_not_queue=True))

2182

2520

except dbus.exceptions.NameExistsException as e:

2183

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

2521

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

2184

2522

use_dbus = False

2185

2523

server_settings["use_dbus"] = False

2186

2524

tcp_server.use_dbus = False

2187

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2188

service = AvahiServiceToSyslog(name =

2189

server_settings["servicename"],

2190

servicetype = "_mandos._tcp",

2191

protocol = protocol, bus = bus)

2192

if server_settings["interface"]:

2193

service.interface = (if_nametoindex

2194

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

2525

if zeroconf:

2526

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2527

service = AvahiServiceToSyslog(name =

2528

server_settings["servicename"],

2529

servicetype = "_mandos._tcp",

2530

protocol = protocol, bus = bus)

2531

if server_settings["interface"]:

2532

service.interface = (if_nametoindex

2533

(server_settings["interface"]

2534

.encode("utf-8")))

2195

2535

2196

2536

global multiprocessing_manager

2197

2537

multiprocessing_manager = multiprocessing.Manager()

2198

2538

2199

2539

client_class = Client

2200

2540

if use_dbus:

2201

client_class = functools.partial(ClientDBusTransitional,

2202

bus = bus)

2541

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

2203

2542

2204

2543

client_settings = Client.config_parser(client_config)

2205

2544

old_client_settings = {}

2206

2545

clients_data = {}

2207

2546

2547

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

2548

global wnull

2549

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

2550

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

2551

# mode

2552

if debug or not foreground:

2553

wnull.close()

2554

2208

2555

# Get client data and settings from last running state.

2209

2556

if server_settings["restore"]:

2210

2557

try:

2213

2560

(stored_state))

2214

2561

os.remove(stored_state_path)

2215

2562

except IOError as e:

2216

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

2217

.format(e))

2218

if e.errno != errno.ENOENT:

2563

if e.errno == errno.ENOENT:

2564

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

2565

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

2566

else:

2567

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

2568

exc_info=e)

2219

2569

raise

2220

2570

except EOFError as e:

2221

2571

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

2222

"EOFError: {0}".format(e))

2572

"EOFError:", exc_info=e)

2223

2573

2224

2574

with PGPEngine() as pgp:

2225

for client_name, client in clients_data.iteritems():

2575

for client_name, client in clients_data.items():

2576

# Skip removed clients

2577

if client_name not in client_settings:

2578

continue

2579

2226

2580

# Decide which value to use after restoring saved state.

2227

2581

# We have three different values: Old config file,

2228

2582

# new config file, and saved state.

2242

2596

2243

2597

# Clients who has passed its expire date can still be

2244

2598

# enabled if its last checker was successful. Clients

2245

# whose checker failed before we stored its state is

2246

# assumed to have failed all checkers during downtime.

2599

# whose checker succeeded before we stored its state is

2600

# assumed to have successfully run all checkers during

2601

# downtime.

2247

2602

if client["enabled"]:

2248

2603

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

2249

2604

if not client["last_checked_ok"]:

2250

2605

logger.warning(

2251

"disabling client {0} - Client never "

2252

"performed a successfull checker"

2253

.format(client["name"]))

2606

"disabling client {} - Client never "

2607

"performed a successful checker"

2608

.format(client_name))

2254

2609

client["enabled"] = False

2255

2610

elif client["last_checker_status"] != 0:

2256

2611

logger.warning(

2257

"disabling client {0} - Client "

2258

"last checker failed with error code {1}"

2259

.format(client["name"],

2612

"disabling client {} - Client last"

2613

" checker failed with error code {}"

2614

.format(client_name,

2260

2615

client["last_checker_status"]))

2261

2616

client["enabled"] = False

2262

2617

else:

2263

2618

client["expires"] = (datetime.datetime

2264

2619

.utcnow()

2265

2620

+ client["timeout"])

2266

2621

logger.debug("Last checker succeeded,"

2622

" keeping {} enabled"

2623

.format(client_name))

2267

2624

try:

2268

2625

client["secret"] = (

2269

2626

pgp.decrypt(client["encrypted_secret"],

2271

2628

["secret"]))

2272

2629

except PGPError:

2273

2630

# If decryption fails, we use secret from new settings

2274

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

2631

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

2275

2632

.format(client_name))

2276

2633

client["secret"] = (

2277

2634

client_settings[client_name]["secret"])

2278

2279

2635

2280

2636

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

2281

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

2637

for client_name in (set(old_client_settings)

2638

- set(client_settings)):

2282

2639

del clients_data[client_name]

2283

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

2640

for client_name in (set(client_settings)

2641

- set(old_client_settings)):

2284

2642

clients_data[client_name] = client_settings[client_name]

2285

2286

# Create clients all clients

2287

for client_name, client in clients_data.iteritems():

2643

2644

# Create all client objects

2645

for client_name, client in clients_data.items():

2288

2646

tcp_server.clients[client_name] = client_class(

2289

name = client_name, settings = client)

2647

name = client_name, settings = client,

2648

server_settings = server_settings)

2290

2649

2291

2650

if not tcp_server.clients:

2292

2651

logger.warning("No clients defined")

2293

2294

if not debug:

2295

try:

2296

with pidfile:

2297

pid = os.getpid()

2298

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

2299

del pidfile

2300

except IOError:

2301

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

2302

pidfilename, pid)

2303

except NameError:

2304

# "pidfile" was never created

2305

pass

2652

2653

if not foreground:

2654

if pidfile is not None:

2655

try:

2656

with pidfile:

2657

pid = os.getpid()

2658

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

2659

except IOError:

2660

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

2661

pidfilename, pid)

2662

del pidfile

2306

2663

del pidfilename

2307

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

2308

2664

2309

2665

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

2310

2666

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

2311

2667

2312

2668

if use_dbus:

2313

class MandosDBusService(dbus.service.Object):

2669

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

2670

"se.bsnet.fukt.Mandos"})

2671

class MandosDBusService(DBusObjectWithProperties):

2314

2672

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

2315

2673

def __init__(self):

2316

2674

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

2317

2675

_interface = "se.recompile.Mandos"

2318

2676

2677

@dbus_interface_annotations(_interface)

2678

def _foo(self):

2679

return { "org.freedesktop.DBus.Property"

2680

".EmitsChangedSignal":

2681

"false"}

2682

2319

2683

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

2320

2684

def ClientAdded(self, objpath):

2321

2685

"D-Bus signal"

2363

2727

2364

2728

del _interface

2365

2729

2366

class MandosDBusServiceTransitional(MandosDBusService):

2367

__metaclass__ = AlternateDBusNamesMetaclass

2368

mandos_dbus_service = MandosDBusServiceTransitional()

2730

mandos_dbus_service = MandosDBusService()

2369

2731

2370

2732

def cleanup():

2371

2733

"Cleanup function; run on exit"

2372

service.cleanup()

2734

if zeroconf:

2735

service.cleanup()

2373

2736

2374

2737

multiprocessing.active_children()

2738

wnull.close()

2375

2739

if not (tcp_server.clients or client_settings):

2376

2740

return

2377

2741

2388

2752

2389

2753

# A list of attributes that can not be pickled

2390

2754

# + secret.

2391

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

2392

"checker"))

2755

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

2756

"checker", "server_settings" }

2393

2757

for name, typ in (inspect.getmembers

2394

2758

(dbus.service.Object)):

2395

2759

exclude.add(name)

2404

2768

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

2405

2769

2406

2770

try:

2407

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2408

prefix="clients-",

2409

dir=os.path.dirname

2410

(stored_state_path))

2411

with os.fdopen(tempfd, "wb") as stored_state:

2771

with (tempfile.NamedTemporaryFile

2772

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

2773

dir=os.path.dirname(stored_state_path),

2774

delete=False)) as stored_state:

2412

2775

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

2776

tempname=stored_state.name

2413

2777

os.rename(tempname, stored_state_path)

2414

2778

except (IOError, OSError) as e:

2415

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

2416

.format(e))

2417

2779

if not debug:

2418

2780

try:

2419

2781

os.remove(tempname)

2420

2782

except NameError:

2421

2783

pass

2422

if e.errno not in set((errno.ENOENT, errno.EACCES,

2423

errno.EEXIST)):

2424

raise e

2784

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

2785

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

2786

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

2787

else:

2788

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

2789

exc_info=e)

2790

raise

2425

2791

2426

2792

# Delete all clients, and settings from config

2427

2793

while tcp_server.clients:

2451

2817

tcp_server.server_activate()

2452

2818

2453

2819

# Find out what port we got

2454

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

2820

if zeroconf:

2821

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

2455

2822

if use_ipv6:

2456

2823

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

2457

" flowinfo %d, scope_id %d"

2458

% tcp_server.socket.getsockname())

2824

" flowinfo %d, scope_id %d",

2825

*tcp_server.socket.getsockname())

2459

2826

else: # IPv4

2460

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

2461

% tcp_server.socket.getsockname())

2827

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

2828

*tcp_server.socket.getsockname())

2462

2829

2463

2830

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

2464

2831

2465

2832

try:

2466

# From the Avahi example code

2467

try:

2468

service.activate()

2469

except dbus.exceptions.DBusException as error:

2470

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

2471

cleanup()

2472

sys.exit(1)

2473

# End of Avahi example code

2833

if zeroconf:

2834

# From the Avahi example code

2835

try:

2836

service.activate()

2837

except dbus.exceptions.DBusException as error:

2838

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

2839

cleanup()

2840

sys.exit(1)

2841

# End of Avahi example code

2474

2842

2475

2843

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

2476

2844

lambda *args, **kwargs:

2480

2848

logger.debug("Starting main loop")

2481

2849

main_loop.run()

2482

2850

except AvahiError as error:

2483

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

2851

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

2484

2852

cleanup()

2485

2853

sys.exit(1)

2486

2854

except KeyboardInterrupt: