/mandos/release : revision 237.7.671

1

#!/usr/bin/python3 -bI

2

# -*- coding: utf-8; lexical-binding: t -*-

1

#!/usr/bin/python

2

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

3

#

4

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

5

#

11

# "AvahiService" class, and some lines in "main".

12

#

13

# Everything else is

14

15

14

15

16

#

17

# This file is part of Mandos.

18

#

31

#

32

# Contact the authors at <mandos@recompile.se>.

33

#

34

35

from __future__ import (division, absolute_import, print_function,

35

36

unicode_literals)

36

37

39

40

except ImportError:

40

41

pass

41

42

import sys

43

import unittest

44

import argparse

45

import logging

46

import os

47

43

try:

48

44

import SocketServer as socketserver

49

45

except ImportError:

50

46

import socketserver

51

47

import socket

48

import argparse

52

49

import datetime

53

50

import errno

54

51

try:

55

52

import ConfigParser as configparser

56

53

except ImportError:

57

54

import configparser

55

import sys

58

56

import re

57

import os

59

58

import signal

60

59

import subprocess

61

60

import atexit

62

61

import stat

62

import logging

63

import logging.handlers

64

import pwd

65

import contextlib

77

import itertools

78

import collections

79

import codecs

80

import random

81

import shlex

82

80

83

81

import dbus

84

82

import dbus.service

85

import gi

86

83

from gi.repository import GLib

87

84

from dbus.mainloop.glib import DBusGMainLoop

88

85

import ctypes

90

87

import xml.dom.minidom

91

88

import inspect

92

89

93

if sys.version_info.major == 2:

94

__metaclass__ = type

95

str = unicode

96

input = raw_input

97

98

# Add collections.abc.Callable if it does not exist

99

try:

100

collections.abc.Callable

101

except AttributeError:

102

class abc:

103

Callable = collections.Callable

104

collections.abc = abc

105

del abc

106

107

# Add shlex.quote if it does not exist

108

try:

109

shlex.quote

110

except AttributeError:

111

shlex.quote = re.escape

112

113

# Show warnings by default

114

if not sys.warnoptions:

115

import warnings

116

warnings.simplefilter("default")

117

118

90

# Try to find the value of SO_BINDTODEVICE:

119

91

try:

120

92

# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and

140

112

# No value found

141

113

SO_BINDTODEVICE = None

142

114

143

if sys.version_info < (3, 2):

144

configparser.Configparser = configparser.SafeConfigParser

115

if sys.version_info.major == 2:

116

str = unicode

145

117

146

version = "1.8.17"

118

version = "1.8.4"

147

119

stored_state_file = "clients.pickle"

148

120

149

log = logging.getLogger(os.path.basename(sys.argv[0]))

150

logging.captureWarnings(True) # Show warnings via the logging system

121

logger = logging.getLogger()

151

122

syslogger = None

152

123

153

124

try:

189

160

facility=logging.handlers.SysLogHandler.LOG_DAEMON,

190

161

address="/dev/log"))

191

162

syslogger.setFormatter(logging.Formatter

192

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

193

" %(message)s"))

194

log.addHandler(syslogger)

163

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

164

' %(message)s'))

165

logger.addHandler(syslogger)

195

166

196

167

if debug:

197

168

console = logging.StreamHandler()

198

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

199

" [%(process)d]:"

200

" %(levelname)s:"

201

" %(message)s"))

202

log.addHandler(console)

203

log.setLevel(level)

169

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

170

' [%(process)d]:'

171

' %(levelname)s:'

172

' %(message)s'))

173

logger.addHandler(console)

174

logger.setLevel(level)

204

175

205

176

206

177

class PGPError(Exception):

208

179

pass

209

180

210

181

211

class PGPEngine:

182

class PGPEngine(object):

212

183

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

213

184

214

185

def __init__(self):

218

189

output = subprocess.check_output(["gpgconf"])

219

190

for line in output.splitlines():

220

191

name, text, path = line.split(b":")

221

if name == b"gpg":

192

if name == "gpg":

222

193

self.gpg = path

223

194

break

224

195

except OSError as e:

225

196

if e.errno != errno.ENOENT:

226

197

raise

227

self.gnupgargs = ["--batch",

228

"--homedir", self.tempdir,

229

"--force-mdc",

230

"--quiet"]

198

self.gnupgargs = ['--batch',

199

'--homedir', self.tempdir,

200

'--force-mdc',

201

'--quiet']

231

202

# Only GPG version 1 has the --no-use-agent option.

232

if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):

203

if self.gpg == "gpg" or self.gpg.endswith("/gpg"):

233

204

self.gnupgargs.append("--no-use-agent")

234

205

235

206

def __enter__(self):

272

243

dir=self.tempdir) as passfile:

273

244

passfile.write(passphrase)

274

245

passfile.flush()

275

proc = subprocess.Popen([self.gpg, "--symmetric",

276

"--passphrase-file",

246

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

247

'--passphrase-file',

277

248

passfile.name]

278

249

+ self.gnupgargs,

279

250

stdin=subprocess.PIPE,

290

261

dir=self.tempdir) as passfile:

291

262

passfile.write(passphrase)

292

263

passfile.flush()

293

proc = subprocess.Popen([self.gpg, "--decrypt",

294

"--passphrase-file",

264

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

265

'--passphrase-file',

295

266

passfile.name]

296

267

+ self.gnupgargs,

297

268

stdin=subprocess.PIPE,

304

275

305

276

306

277

# Pretend that we have an Avahi module

307

class avahi:

278

class avahi(object):

308

279

"""This isn't so much a class as it is a module-like namespace."""

309

280

IF_UNSPEC = -1 # avahi-common/address.h

310

281

PROTO_UNSPEC = -1 # avahi-common/address.h

344

315

pass

345

316

346

317

347

class AvahiService:

318

class AvahiService(object):

348

319

"""An Avahi (Zeroconf) service.

349

320

350

321

Attributes:

351

322

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

352

323

Used to optionally bind to the specified interface.

353

name: string; Example: "Mandos"

354

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

324

name: string; Example: 'Mandos'

325

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

355

326

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

356

327

port: integer; what port to announce

357

328

TXT: list of strings; TXT record for the service

394

365

def rename(self, remove=True):

395

366

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

396

367

if self.rename_count >= self.max_renames:

397

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

398

" after %i retries, exiting.",

399

self.rename_count)

368

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

369

" after %i retries, exiting.",

370

self.rename_count)

400

371

raise AvahiServiceError("Too many renames")

401

372

self.name = str(

402

373

self.server.GetAlternativeServiceName(self.name))

403

374

self.rename_count += 1

404

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

405

self.name)

375

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

376

self.name)

406

377

if remove:

407

378

self.remove()

408

379

try:

410

381

except dbus.exceptions.DBusException as error:

411

382

if (error.get_dbus_name()

412

383

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

413

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

384

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

414

385

return self.rename(remove=False)

415

386

else:

416

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

387

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

417

388

self.cleanup()

418

389

os._exit(1)

419

390

435

406

avahi.DBUS_INTERFACE_ENTRY_GROUP)

436

407

self.entry_group_state_changed_match = (

437

408

self.group.connect_to_signal(

438

"StateChanged", self.entry_group_state_changed))

439

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

440

self.name, self.type)

409

'StateChanged', self.entry_group_state_changed))

410

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

411

self.name, self.type)

441

412

self.group.AddService(

442

413

self.interface,

443

414

self.protocol,

450

421

451

422

def entry_group_state_changed(self, state, error):

452

423

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

453

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

424

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

454

425

455

426

if state == avahi.ENTRY_GROUP_ESTABLISHED:

456

log.debug("Zeroconf service established.")

427

logger.debug("Zeroconf service established.")

457

428

elif state == avahi.ENTRY_GROUP_COLLISION:

458

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

429

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

459

430

self.rename()

460

431

elif state == avahi.ENTRY_GROUP_FAILURE:

461

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

462

str(error))

432

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

433

str(error))

463

434

raise AvahiGroupError("State changed: {!s}".format(error))

464

435

465

436

def cleanup(self):

475

446

476

447

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

477

448

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

478

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

449

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

479

450

bad_states = {

480

451

avahi.SERVER_INVALID: "Zeroconf server invalid",

481

452

avahi.SERVER_REGISTERING: None,

485

456

if state in bad_states:

486

457

if bad_states[state] is not None:

487

458

if error is None:

488

log.error(bad_states[state])

459

logger.error(bad_states[state])

489

460

else:

490

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

461

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

491

462

self.cleanup()

492

463

elif state == avahi.SERVER_RUNNING:

493

464

try:

495

466

except dbus.exceptions.DBusException as error:

496

467

if (error.get_dbus_name()

497

468

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

498

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

469

logger.info("Local Zeroconf service name"

470

" collision.")

499

471

return self.rename(remove=False)

500

472

else:

501

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

473

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

502

474

self.cleanup()

503

475

os._exit(1)

504

476

else:

505

477

if error is None:

506

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

478

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

507

479

else:

508

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

480

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

509

481

510

482

def activate(self):

511

483

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

523

495

class AvahiServiceToSyslog(AvahiService):

524

496

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

525

497

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

526

ret = super(AvahiServiceToSyslog, self).rename(*args,

527

**kwargs)

498

ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)

528

499

syslogger.setFormatter(logging.Formatter(

529

"Mandos ({}) [%(process)d]: %(levelname)s: %(message)s"

500

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

530

501

.format(self.name)))

531

502

return ret

532

503

533

504

534

505

# Pretend that we have a GnuTLS module

535

class gnutls:

506

class gnutls(object):

536

507

"""This isn't so much a class as it is a module-like namespace."""

537

508

538

509

library = ctypes.util.find_library("gnutls")

562

533

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

563

534

564

535

# Types

565

class _session_int(ctypes.Structure):

536

class session_int(ctypes.Structure):

566

537

_fields_ = []

567

session_t = ctypes.POINTER(_session_int)

538

session_t = ctypes.POINTER(session_int)

568

539

569

540

class certificate_credentials_st(ctypes.Structure):

570

541

_fields_ = []

573

544

certificate_type_t = ctypes.c_int

574

545

575

546

class datum_t(ctypes.Structure):

576

_fields_ = [("data", ctypes.POINTER(ctypes.c_ubyte)),

577

("size", ctypes.c_uint)]

547

_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),

548

('size', ctypes.c_uint)]

578

549

579

class _openpgp_crt_int(ctypes.Structure):

550

class openpgp_crt_int(ctypes.Structure):

580

551

_fields_ = []

581

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

552

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

582

553

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

583

554

log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)

584

555

credentials_type_t = ctypes.c_int

593

564

# gnutls.strerror()

594

565

self.code = code

595

566

if message is None and code is not None:

596

message = gnutls.strerror(code).decode(

597

"utf-8", errors="replace")

567

message = gnutls.strerror(code)

598

568

return super(gnutls.Error, self).__init__(

599

569

message, *args)

600

570

601

571

class CertificateSecurityError(Error):

602

572

pass

603

573

604

class PointerTo:

605

def __init__(self, cls):

606

self.cls = cls

607

608

def from_param(self, obj):

609

if not isinstance(obj, self.cls):

610

raise TypeError("Not of type {}: {!r}"

611

.format(self.cls.__name__, obj))

612

return ctypes.byref(obj.from_param(obj))

613

614

class CastToVoidPointer:

615

def __init__(self, cls):

616

self.cls = cls

617

618

def from_param(self, obj):

619

if not isinstance(obj, self.cls):

620

raise TypeError("Not of type {}: {!r}"

621

.format(self.cls.__name__, obj))

622

return ctypes.cast(obj.from_param(obj), ctypes.c_void_p)

623

624

class With_from_param:

625

@classmethod

626

def from_param(cls, obj):

627

return obj._as_parameter_

628

629

574

# Classes

630

class Credentials(With_from_param):

575

class Credentials(object):

631

576

def __init__(self):

632

self._as_parameter_ = gnutls.certificate_credentials_t()

633

gnutls.certificate_allocate_credentials(self)

577

self._c_object = gnutls.certificate_credentials_t()

578

gnutls.certificate_allocate_credentials(

579

ctypes.byref(self._c_object))

634

580

self.type = gnutls.CRD_CERTIFICATE

635

581

636

582

def __del__(self):

637

gnutls.certificate_free_credentials(self)

583

gnutls.certificate_free_credentials(self._c_object)

638

584

639

class ClientSession(With_from_param):

585

class ClientSession(object):

640

586

def __init__(self, socket, credentials=None):

641

self._as_parameter_ = gnutls.session_t()

587

self._c_object = gnutls.session_t()

642

588

gnutls_flags = gnutls.CLIENT

643

if gnutls.check_version(b"3.5.6"):

589

if gnutls.check_version("3.5.6"):

644

590

gnutls_flags |= gnutls.NO_TICKETS

645

591

if gnutls.has_rawpk:

646

592

gnutls_flags |= gnutls.ENABLE_RAWPK

647

gnutls.init(self, gnutls_flags)

593

gnutls.init(ctypes.byref(self._c_object), gnutls_flags)

648

594

del gnutls_flags

649

gnutls.set_default_priority(self)

650

gnutls.transport_set_ptr(self, socket.fileno())

651

gnutls.handshake_set_private_extensions(self, True)

595

gnutls.set_default_priority(self._c_object)

596

gnutls.transport_set_ptr(self._c_object, socket.fileno())

597

gnutls.handshake_set_private_extensions(self._c_object,

598

True)

652

599

self.socket = socket

653

600

if credentials is None:

654

601

credentials = gnutls.Credentials()

655

gnutls.credentials_set(self, credentials.type,

656

credentials)

602

gnutls.credentials_set(self._c_object, credentials.type,

603

ctypes.cast(credentials._c_object,

604

ctypes.c_void_p))

657

605

self.credentials = credentials

658

606

659

607

def __del__(self):

660

gnutls.deinit(self)

608

gnutls.deinit(self._c_object)

661

609

662

610

def handshake(self):

663

return gnutls.handshake(self)

611

return gnutls.handshake(self._c_object)

664

612

665

613

def send(self, data):

666

614

data = bytes(data)

667

615

data_len = len(data)

668

616

while data_len > 0:

669

data_len -= gnutls.record_send(self, data[-data_len:],

617

data_len -= gnutls.record_send(self._c_object,

618

data[-data_len:],

670

619

data_len)

671

620

672

621

def bye(self):

673

return gnutls.bye(self, gnutls.SHUT_RDWR)

622

return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)

674

623

675

624

# Error handling functions

676

625

def _error_code(result):

677

626

"""A function to raise exceptions on errors, suitable

678

for the "restype" attribute on ctypes functions"""

679

if result >= gnutls.E_SUCCESS:

627

for the 'restype' attribute on ctypes functions"""

628

if result >= 0:

680

629

return result

681

630

if result == gnutls.E_NO_CERTIFICATE_FOUND:

682

631

raise gnutls.CertificateSecurityError(code=result)

683

632

raise gnutls.Error(code=result)

684

633

685

def _retry_on_error(result, func, arguments,

686

_error_code=_error_code):

634

def _retry_on_error(result, func, arguments):

687

635

"""A function to retry on some errors, suitable

688

for the "errcheck" attribute on ctypes functions"""

689

while result < gnutls.E_SUCCESS:

636

for the 'errcheck' attribute on ctypes functions"""

637

while result < 0:

690

638

if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):

691

639

return _error_code(result)

692

640

result = func(*arguments)

697

645

698

646

# Functions

699

647

priority_set_direct = _library.gnutls_priority_set_direct

700

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

648

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

701

649

ctypes.POINTER(ctypes.c_char_p)]

702

650

priority_set_direct.restype = _error_code

703

651

704

652

init = _library.gnutls_init

705

init.argtypes = [PointerTo(ClientSession), ctypes.c_int]

653

init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]

706

654

init.restype = _error_code

707

655

708

656

set_default_priority = _library.gnutls_set_default_priority

709

set_default_priority.argtypes = [ClientSession]

657

set_default_priority.argtypes = [session_t]

710

658

set_default_priority.restype = _error_code

711

659

712

660

record_send = _library.gnutls_record_send

713

record_send.argtypes = [ClientSession, ctypes.c_void_p,

661

record_send.argtypes = [session_t, ctypes.c_void_p,

714

662

ctypes.c_size_t]

715

663

record_send.restype = ctypes.c_ssize_t

716

664

record_send.errcheck = _retry_on_error

718

666

certificate_allocate_credentials = (

719

667

_library.gnutls_certificate_allocate_credentials)

720

668

certificate_allocate_credentials.argtypes = [

721

PointerTo(Credentials)]

669

ctypes.POINTER(certificate_credentials_t)]

722

670

certificate_allocate_credentials.restype = _error_code

723

671

724

672

certificate_free_credentials = (

725

673

_library.gnutls_certificate_free_credentials)

726

certificate_free_credentials.argtypes = [Credentials]

674

certificate_free_credentials.argtypes = [

675

certificate_credentials_t]

727

676

certificate_free_credentials.restype = None

728

677

729

678

handshake_set_private_extensions = (

730

679

_library.gnutls_handshake_set_private_extensions)

731

handshake_set_private_extensions.argtypes = [ClientSession,

680

handshake_set_private_extensions.argtypes = [session_t,

732

681

ctypes.c_int]

733

682

handshake_set_private_extensions.restype = None

734

683

735

684

credentials_set = _library.gnutls_credentials_set

736

credentials_set.argtypes = [ClientSession, credentials_type_t,

737

CastToVoidPointer(Credentials)]

685

credentials_set.argtypes = [session_t, credentials_type_t,

686

ctypes.c_void_p]

738

687

credentials_set.restype = _error_code

739

688

740

689

strerror = _library.gnutls_strerror

742

691

strerror.restype = ctypes.c_char_p

743

692

744

693

certificate_type_get = _library.gnutls_certificate_type_get

745

certificate_type_get.argtypes = [ClientSession]

694

certificate_type_get.argtypes = [session_t]

746

695

certificate_type_get.restype = _error_code

747

696

748

697

certificate_get_peers = _library.gnutls_certificate_get_peers

749

certificate_get_peers.argtypes = [ClientSession,

698

certificate_get_peers.argtypes = [session_t,

750

699

ctypes.POINTER(ctypes.c_uint)]

751

700

certificate_get_peers.restype = ctypes.POINTER(datum_t)

752

701

759

708

global_set_log_function.restype = None

760

709

761

710

deinit = _library.gnutls_deinit

762

deinit.argtypes = [ClientSession]

711

deinit.argtypes = [session_t]

763

712

deinit.restype = None

764

713

765

714

handshake = _library.gnutls_handshake

766

handshake.argtypes = [ClientSession]

767

handshake.restype = ctypes.c_int

715

handshake.argtypes = [session_t]

716

handshake.restype = _error_code

768

717

handshake.errcheck = _retry_on_error

769

718

770

719

transport_set_ptr = _library.gnutls_transport_set_ptr

771

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

720

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

772

721

transport_set_ptr.restype = None

773

722

774

723

bye = _library.gnutls_bye

775

bye.argtypes = [ClientSession, close_request_t]

776

bye.restype = ctypes.c_int

724

bye.argtypes = [session_t, close_request_t]

725

bye.restype = _error_code

777

726

bye.errcheck = _retry_on_error

778

727

779

728

check_version = _library.gnutls_check_version

796

745

797

746

x509_crt_fmt_t = ctypes.c_int

798

747

799

# All the function declarations below are from

800

# gnutls/abstract.h

748

# All the function declarations below are from gnutls/abstract.h

801

749

pubkey_init = _library.gnutls_pubkey_init

802

750

pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]

803

751

pubkey_init.restype = _error_code

817

765

pubkey_deinit.argtypes = [pubkey_t]

818

766

pubkey_deinit.restype = None

819

767

else:

820

# All the function declarations below are from

821

# gnutls/openpgp.h

768

# All the function declarations below are from gnutls/openpgp.h

822

769

823

770

openpgp_crt_init = _library.gnutls_openpgp_crt_init

824

771

openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]

830

777

openpgp_crt_fmt_t]

831

778

openpgp_crt_import.restype = _error_code

832

779

833

openpgp_crt_verify_self = \

834

_library.gnutls_openpgp_crt_verify_self

835

openpgp_crt_verify_self.argtypes = [

836

openpgp_crt_t,

837

ctypes.c_uint,

838

ctypes.POINTER(ctypes.c_uint),

839

]

780

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

781

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

782

ctypes.POINTER(ctypes.c_uint)]

840

783

openpgp_crt_verify_self.restype = _error_code

841

784

842

785

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

851

794

ctypes.c_size_t)]

852

795

openpgp_crt_get_fingerprint.restype = _error_code

853

796

854

if check_version(b"3.6.4"):

797

if check_version("3.6.4"):

855

798

certificate_type_get2 = _library.gnutls_certificate_type_get2

856

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

799

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

857

800

certificate_type_get2.restype = _error_code

858

801

859

802

# Remove non-public functions

871

814

connection.close()

872

815

873

816

874

class Client:

817

class Client(object):

875

818

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

876

819

877

820

Attributes:

878

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

821

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

879

822

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

880

823

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

881

checker: multiprocessing.Process(); a running checker process used

882

to see if the client lives. None if no process is

883

running.

824

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

825

to see if the client lives.

826

'None' if no process is running.

884

827

checker_callback_tag: a GLib event source tag, or None

885

828

checker_command: string; External command which is run to check

886

829

if client lives. %() expansions are done at

961

904

# key_id() and fingerprint() functions

962

905

client["key_id"] = (section.get("key_id", "").upper()

963

906

.replace(" ", ""))

964

client["fingerprint"] = (section.get("fingerprint",

965

"").upper()

907

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

966

908

.replace(" ", ""))

967

if not (client["key_id"] or client["fingerprint"]):

968

log.error("Skipping client %s without key_id or"

969

" fingerprint", client_name)

970

del settings[client_name]

971

continue

972

909

if "secret" in section:

973

910

client["secret"] = codecs.decode(section["secret"]

974

911

.encode("utf-8"),

1015

952

self.last_enabled = None

1016

953

self.expires = None

1017

954

1018

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

1019

log.debug(" Key ID: %s", self.key_id)

1020

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

955

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

956

logger.debug(" Key ID: %s", self.key_id)

957

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

1021

958

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

1022

959

datetime.datetime.utcnow())

1023

960

1051

988

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

1052

989

# Already enabled

1053

990

return

991

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

1054

992

self.enabled = True

1055

993

self.last_enabled = datetime.datetime.utcnow()

1056

994

self.init_checker()

1061

999

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

1062

1000

return False

1063

1001

if not quiet:

1064

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

1002

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

1065

1003

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

1066

1004

GLib.source_remove(self.disable_initiator_tag)

1067

1005

self.disable_initiator_tag = None

1079

1017

def __del__(self):

1080

1018

self.disable()

1081

1019

1082

def init_checker(self, randomize_start=False):

1083

# Schedule a new checker to be started a randomly selected

1084

# time (a fraction of 'interval') from now. This spreads out

1085

# the startup of checkers over time when the server is

1086

# started.

1020

def init_checker(self):

1021

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

1022

# and every interval from then on.

1087

1023

if self.checker_initiator_tag is not None:

1088

1024

GLib.source_remove(self.checker_initiator_tag)

1089

interval_milliseconds = int(self.interval.total_seconds()

1090

* 1000)

1091

if randomize_start:

1092

delay_milliseconds = random.randrange(

1093

interval_milliseconds + 1)

1094

else:

1095

delay_milliseconds = interval_milliseconds

1096

1025

self.checker_initiator_tag = GLib.timeout_add(

1097

delay_milliseconds, self.start_checker, randomize_start)

1098

delay = datetime.timedelta(0, 0, 0, delay_milliseconds)

1099

# A checker might take up to an 'interval' of time, so we can

1100

# expire at the soonest one interval after a checker was

1101

# started. Since the initial checker is delayed, the expire

1102

# time might have to be extended.

1103

now = datetime.datetime.utcnow()

1104

self.expires = now + delay + self.interval

1105

# Schedule a disable() at expire time

1026

int(self.interval.total_seconds() * 1000),

1027

self.start_checker)

1028

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

1106

1029

if self.disable_initiator_tag is not None:

1107

1030

GLib.source_remove(self.disable_initiator_tag)

1108

1031

self.disable_initiator_tag = GLib.timeout_add(

1109

int((self.expires - now).total_seconds() * 1000),

1110

self.disable)

1032

int(self.timeout.total_seconds() * 1000), self.disable)

1033

# Also start a new checker *right now*.

1034

self.start_checker()

1111

1035

1112

1036

def checker_callback(self, source, condition, connection,

1113

1037

command):

1114

1038

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

1039

self.checker_callback_tag = None

1040

self.checker = None

1115

1041

# Read return code from connection (see call_pipe)

1116

1042

returncode = connection.recv()

1117

1043

connection.close()

1118

if self.checker is not None:

1119

self.checker.join()

1120

self.checker_callback_tag = None

1121

self.checker = None

1122

1044

1123

1045

if returncode >= 0:

1124

1046

self.last_checker_status = returncode

1125

1047

self.last_checker_signal = None

1126

1048

if self.last_checker_status == 0:

1127

log.info("Checker for %(name)s succeeded", vars(self))

1049

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

1050

vars(self))

1128

1051

self.checked_ok()

1129

1052

else:

1130

log.info("Checker for %(name)s failed", vars(self))

1053

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

1131

1054

else:

1132

1055

self.last_checker_status = -1

1133

1056

self.last_checker_signal = -returncode

1134

log.warning("Checker for %(name)s crashed?", vars(self))

1057

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

1058

vars(self))

1135

1059

return False

1136

1060

1137

1061

def checked_ok(self):

1156

1080

def need_approval(self):

1157

1081

self.last_approval_request = datetime.datetime.utcnow()

1158

1082

1159

def start_checker(self, start_was_randomized=False):

1083

def start_checker(self):

1160

1084

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

1161

1085

1162

1086

If a checker already exists, leave it running and do

1171

1095

# should be.

1172

1096

1173

1097

if self.checker is not None and not self.checker.is_alive():

1174

log.warning("Checker was not alive; joining")

1098

logger.warning("Checker was not alive; joining")

1175

1099

self.checker.join()

1176

1100

self.checker = None

1177

1101

# Start a new checker if needed

1178

1102

if self.checker is None:

1179

1103

# Escape attributes for the shell

1180

1104

escaped_attrs = {

1181

attr: shlex.quote(str(getattr(self, attr)))

1105

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

1182

1106

for attr in self.runtime_expansions}

1183

1107

try:

1184

1108

command = self.checker_command % escaped_attrs

1185

1109

except TypeError as error:

1186

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

1187

self.checker_command, exc_info=error)

1110

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

1111

self.checker_command,

1112

exc_info=error)

1188

1113

return True # Try again later

1189

1114

self.current_checker_command = command

1190

log.info("Starting checker %r for %s", command, self.name)

1115

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

1116

self.name)

1191

1117

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

1192

1118

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

1193

1119

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

1209

1135

kwargs=popen_args)

1210

1136

self.checker.start()

1211

1137

self.checker_callback_tag = GLib.io_add_watch(

1212

GLib.IOChannel.unix_new(pipe[0].fileno()),

1213

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1138

pipe[0].fileno(), GLib.IO_IN,

1214

1139

self.checker_callback, pipe[0], command)

1215

if start_was_randomized:

1216

# We were started after a random delay; Schedule a new

1217

# checker to be started an 'interval' from now, and every

1218

# interval from then on.

1219

now = datetime.datetime.utcnow()

1220

self.checker_initiator_tag = GLib.timeout_add(

1221

int(self.interval.total_seconds() * 1000),

1222

self.start_checker)

1223

self.expires = max(self.expires, now + self.interval)

1224

# Don't start a new checker again after same random delay

1225

return False

1226

1140

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

1227

1141

return True

1228

1142

1233

1147

self.checker_callback_tag = None

1234

1148

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

1235

1149

return

1236

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

1150

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

1237

1151

self.checker.terminate()

1238

1152

self.checker = None

1239

1153

1266

1180

func._dbus_name = func.__name__

1267

1181

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

1268

1182

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

1269

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1183

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1270

1184

return func

1271

1185

1272

1186

return decorator

1361

1275

1362

1276

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1363

1277

out_signature="s",

1364

path_keyword="object_path",

1365

connection_keyword="connection")

1278

path_keyword='object_path',

1279

connection_keyword='connection')

1366

1280

def Introspect(self, object_path, connection):

1367

1281

"""Overloading of standard D-Bus method.

1368

1282

1417

1331

document.unlink()

1418

1332

except (AttributeError, xml.dom.DOMException,

1419

1333

xml.parsers.expat.ExpatError) as error:

1420

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

1421

exc_info=error)

1334

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

1335

exc_info=error)

1422

1336

return xmlstring

1423

1337

1424

1338

1482

1396

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

1483

1397

"'ay' signature {!r}"

1484

1398

.format(prop._dbus_signature))

1485

value = dbus.ByteArray(bytes(value))

1399

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

1400

for byte in value))

1486

1401

prop(value)

1487

1402

1488

1403

@dbus.service.method(dbus.PROPERTIES_IFACE,

1521

1436

1522

1437

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1523

1438

out_signature="s",

1524

path_keyword="object_path",

1525

connection_keyword="connection")

1439

path_keyword='object_path',

1440

connection_keyword='connection')

1526

1441

def Introspect(self, object_path, connection):

1527

1442

"""Overloading of standard D-Bus method.

1528

1443

1584

1499

document.unlink()

1585

1500

except (AttributeError, xml.dom.DOMException,

1586

1501

xml.parsers.expat.ExpatError) as error:

1587

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

1588

exc_info=error)

1502

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

1503

exc_info=error)

1589

1504

return xmlstring

1590

1505

1591

1506

1623

1538

1624

1539

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1625

1540

out_signature="s",

1626

path_keyword="object_path",

1627

connection_keyword="connection")

1541

path_keyword='object_path',

1542

connection_keyword='connection')

1628

1543

def Introspect(self, object_path, connection):

1629

1544

"""Overloading of standard D-Bus method.

1630

1545

1655

1570

document.unlink()

1656

1571

except (AttributeError, xml.dom.DOMException,

1657

1572

xml.parsers.expat.ExpatError) as error:

1658

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

1659

exc_info=error)

1573

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

1574

exc_info=error)

1660

1575

return xmlstring

1661

1576

1662

1577

2293

2208

del _interface

2294

2209

2295

2210

2296

class ProxyClient:

2211

class ProxyClient(object):

2297

2212

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

2298

2213

self._pipe = child_pipe

2299

self._pipe.send(("init", key_id, fpr, address))

2214

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

2300

2215

if not self._pipe.recv():

2301

2216

raise KeyError(key_id or fpr)

2302

2217

2303

2218

def __getattribute__(self, name):

2304

if name == "_pipe":

2219

if name == '_pipe':

2305

2220

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

2306

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

2221

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

2307

2222

data = self._pipe.recv()

2308

if data[0] == "data":

2223

if data[0] == 'data':

2309

2224

return data[1]

2310

if data[0] == "function":

2225

if data[0] == 'function':

2311

2226

2312

2227

def func(*args, **kwargs):

2313

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

2228

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

2314

2229

return self._pipe.recv()[1]

2315

2230

2316

2231

return func

2317

2232

2318

2233

def __setattr__(self, name, value):

2319

if name == "_pipe":

2234

if name == '_pipe':

2320

2235

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

2321

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

2236

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

2322

2237

2323

2238

2324

2239

class ClientHandler(socketserver.BaseRequestHandler, object):

2329

2244

2330

2245

def handle(self):

2331

2246

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

2332

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

2333

str(self.client_address))

2334

log.debug("Pipe FD: %d", self.server.child_pipe.fileno())

2247

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

2248

str(self.client_address))

2249

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

2250

self.server.child_pipe.fileno())

2335

2251

2336

2252

session = gnutls.ClientSession(self.request)

2337

2253

2338

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

2254

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

2339

2255

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

2340

2256

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

2341

2257

# "+DHE-DSS"))

2343

2259

priority = self.server.gnutls_priority

2344

2260

if priority is None:

2345

2261

priority = "NORMAL"

2346

gnutls.priority_set_direct(session,

2347

priority.encode("utf-8"), None)

2262

gnutls.priority_set_direct(session._c_object,

2263

priority.encode("utf-8"),

2264

None)

2348

2265

2349

2266

# Start communication using the Mandos protocol

2350

2267

# Get protocol number

2351

2268

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

2352

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

2269

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

2353

2270

try:

2354

2271

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

2355

2272

raise RuntimeError(line)

2356

2273

except (ValueError, IndexError, RuntimeError) as error:

2357

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

2274

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

2358

2275

return

2359

2276

2360

2277

# Start GnuTLS connection

2361

2278

try:

2362

2279

session.handshake()

2363

2280

except gnutls.Error as error:

2364

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

2281

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

2365

2282

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

2366

2283

# established. Just abandon the request.

2367

2284

return

2368

log.debug("Handshake succeeded")

2285

logger.debug("Handshake succeeded")

2369

2286

2370

2287

approval_required = False

2371

2288

try:

2372

2289

if gnutls.has_rawpk:

2373

fpr = b""

2290

fpr = ""

2374

2291

try:

2375

2292

key_id = self.key_id(

2376

2293

self.peer_certificate(session))

2377

2294

except (TypeError, gnutls.Error) as error:

2378

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

2295

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

2379

2296

return

2380

log.debug("Key ID: %s",

2381

key_id.decode("utf-8",

2382

errors="replace"))

2297

logger.debug("Key ID: %s", key_id)

2383

2298

2384

2299

else:

2385

key_id = b""

2300

key_id = ""

2386

2301

try:

2387

2302

fpr = self.fingerprint(

2388

2303

self.peer_certificate(session))

2389

2304

except (TypeError, gnutls.Error) as error:

2390

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

2305

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

2391

2306

return

2392

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

2307

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

2393

2308

2394

2309

try:

2395

2310

client = ProxyClient(child_pipe, key_id, fpr,

2404

2319

2405

2320

while True:

2406

2321

if not client.enabled:

2407

log.info("Client %s is disabled", client.name)

2322

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

2323

client.name)

2408

2324

if self.server.use_dbus:

2409

2325

# Emit D-Bus signal

2410

2326

client.Rejected("Disabled")

2414

2330

# We are approved or approval is disabled

2415

2331

break

2416

2332

elif client.approved is None:

2417

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

2418

client.name)

2333

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

2334

client.name)

2419

2335

if self.server.use_dbus:

2420

2336

# Emit D-Bus signal

2421

2337

client.NeedApproval(

2422

2338

client.approval_delay.total_seconds()

2423

2339

* 1000, client.approved_by_default)

2424

2340

else:

2425

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

2426

client.name)

2341

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

2342

client.name)

2427

2343

if self.server.use_dbus:

2428

2344

# Emit D-Bus signal

2429

2345

client.Rejected("Denied")

2437

2353

time2 = datetime.datetime.now()

2438

2354

if (time2 - time) >= delay:

2439

2355

if not client.approved_by_default:

2440

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

2441

" waiting for approval",

2442

client.name)

2356

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

2357

" waiting for approval",

2358

client.name)

2443

2359

if self.server.use_dbus:

2444

2360

# Emit D-Bus signal

2445

2361

client.Rejected("Approval timed out")

2452

2368

try:

2453

2369

session.send(client.secret)

2454

2370

except gnutls.Error as error:

2455

log.warning("gnutls send failed", exc_info=error)

2371

logger.warning("gnutls send failed",

2372

exc_info=error)

2456

2373

return

2457

2374

2458

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

2375

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

2459

2376

# bump the timeout using extended_timeout

2460

2377

client.bump_timeout(client.extended_timeout)

2461

2378

if self.server.use_dbus:

2468

2385

try:

2469

2386

session.bye()

2470

2387

except gnutls.Error as error:

2471

log.warning("GnuTLS bye failed", exc_info=error)

2388

logger.warning("GnuTLS bye failed",

2389

exc_info=error)

2472

2390

2473

2391

@staticmethod

2474

2392

def peer_certificate(session):

2475

2393

"Return the peer's certificate as a bytestring"

2476

2394

try:

2477

cert_type = gnutls.certificate_type_get2(

2478

session, gnutls.CTYPE_PEERS)

2395

cert_type = gnutls.certificate_type_get2(session._c_object,

2396

gnutls.CTYPE_PEERS)

2479

2397

except AttributeError:

2480

cert_type = gnutls.certificate_type_get(session)

2398

cert_type = gnutls.certificate_type_get(session._c_object)

2481

2399

if gnutls.has_rawpk:

2482

2400

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2483

2401

else:

2484

2402

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2485

2403

# If not a valid certificate type...

2486

2404

if cert_type not in valid_cert_types:

2487

log.info("Cert type %r not in %r", cert_type,

2488

valid_cert_types)

2405

logger.info("Cert type %r not in %r", cert_type,

2406

valid_cert_types)

2489

2407

# ...return invalid data

2490

2408

return b""

2491

2409

list_size = ctypes.c_uint(1)

2492

2410

cert_list = (gnutls.certificate_get_peers

2493

(session, ctypes.byref(list_size)))

2411

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

2494

2412

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

2495

2413

raise gnutls.Error("error getting peer certificate")

2496

2414

if list_size.value == 0:

2518

2436

buf = ctypes.create_string_buffer(32)

2519

2437

buf_len = ctypes.c_size_t(len(buf))

2520

2438

# Get the key ID from the raw public key into the buffer

2521

gnutls.pubkey_get_key_id(

2522

pubkey,

2523

gnutls.KEYID_USE_SHA256,

2524

ctypes.cast(ctypes.byref(buf),

2525

ctypes.POINTER(ctypes.c_ubyte)),

2526

ctypes.byref(buf_len))

2439

gnutls.pubkey_get_key_id(pubkey,

2440

gnutls.KEYID_USE_SHA256,

2441

ctypes.cast(ctypes.byref(buf),

2442

ctypes.POINTER(ctypes.c_ubyte)),

2443

ctypes.byref(buf_len))

2527

2444

# Deinit the certificate

2528

2445

gnutls.pubkey_deinit(pubkey)

2529

2446

2570

2487

return hex_fpr

2571

2488

2572

2489

2573

class MultiprocessingMixIn:

2490

class MultiprocessingMixIn(object):

2574

2491

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

2575

2492

2576

2493

def sub_process_main(self, request, address):

2588

2505

return proc

2589

2506

2590

2507

2591

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2508

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2592

2509

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

2593

2510

2594

2511

def process_request(self, request, client_address):

2609

2526

2610

2527

2611

2528

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2612

socketserver.TCPServer):

2613

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

2529

socketserver.TCPServer, object):

2530

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

2614

2531

2615

2532

Attributes:

2616

2533

enabled: Boolean; whether this server is activated yet

2667

2584

if SO_BINDTODEVICE is None:

2668

2585

# Fall back to a hard-coded value which seems to be

2669

2586

# common enough.

2670

log.warning("SO_BINDTODEVICE not found, trying 25")

2587

logger.warning("SO_BINDTODEVICE not found, trying 25")

2671

2588

SO_BINDTODEVICE = 25

2672

2589

try:

2673

2590

self.socket.setsockopt(

2675

2592

(self.interface + "\0").encode("utf-8"))

2676

2593

except socket.error as error:

2677

2594

if error.errno == errno.EPERM:

2678

log.error("No permission to bind to interface %s",

2679

self.interface)

2595

logger.error("No permission to bind to"

2596

" interface %s", self.interface)

2680

2597

elif error.errno == errno.ENOPROTOOPT:

2681

log.error("SO_BINDTODEVICE not available; cannot"

2682

" bind to interface %s", self.interface)

2598

logger.error("SO_BINDTODEVICE not available;"

2599

" cannot bind to interface %s",

2600

self.interface)

2683

2601

elif error.errno == errno.ENODEV:

2684

log.error("Interface %s does not exist, cannot"

2685

" bind", self.interface)

2602

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

2603

" cannot bind", self.interface)

2686

2604

else:

2687

2605

raise

2688

2606

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

2747

2665

def add_pipe(self, parent_pipe, proc):

2748

2666

# Call "handle_ipc" for both data and EOF events

2749

2667

GLib.io_add_watch(

2750

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2751

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2668

parent_pipe.fileno(),

2669

GLib.IO_IN | GLib.IO_HUP,

2752

2670

functools.partial(self.handle_ipc,

2753

2671

parent_pipe=parent_pipe,

2754

2672

proc=proc))

2767

2685

request = parent_pipe.recv()

2768

2686

command = request[0]

2769

2687

2770

if command == "init":

2688

if command == 'init':

2771

2689

key_id = request[1].decode("ascii")

2772

2690

fpr = request[2].decode("ascii")

2773

2691

address = request[3]

2774

2692

2775

2693

for c in self.clients.values():

2776

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2777

"27AE41E4649B934CA495991B7852B855"):

2694

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2778

2695

continue

2779

2696

if key_id and c.key_id == key_id:

2780

2697

client = c

2783

2700

client = c

2784

2701

break

2785

2702

else:

2786

log.info("Client not found for key ID: %s, address:"

2787

" %s", key_id or fpr, address)

2703

logger.info("Client not found for key ID: %s, address"

2704

": %s", key_id or fpr, address)

2788

2705

if self.use_dbus:

2789

2706

# Emit D-Bus signal

2790

2707

mandos_dbus_service.ClientNotFound(key_id or fpr,

2793

2710

return False

2794

2711

2795

2712

GLib.io_add_watch(

2796

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2797

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2713

parent_pipe.fileno(),

2714

GLib.IO_IN | GLib.IO_HUP,

2798

2715

functools.partial(self.handle_ipc,

2799

2716

parent_pipe=parent_pipe,

2800

2717

proc=proc,

2803

2720

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

2804

2721

# same fileno

2805

2722

return False

2806

if command == "funcall":

2723

if command == 'funcall':

2807

2724

funcname = request[1]

2808

2725

args = request[2]

2809

2726

kwargs = request[3]

2810

2727

2811

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

2728

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

2812

2729

funcname)(*args,

2813

2730

**kwargs)))

2814

2731

2815

if command == "getattr":

2732

if command == 'getattr':

2816

2733

attrname = request[1]

2817

2734

if isinstance(client_object.__getattribute__(attrname),

2818

collections.abc.Callable):

2819

parent_pipe.send(("function", ))

2735

collections.Callable):

2736

parent_pipe.send(('function', ))

2820

2737

else:

2821

2738

parent_pipe.send((

2822

"data", client_object.__getattribute__(attrname)))

2739

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

2823

2740

2824

if command == "setattr":

2741

if command == 'setattr':

2825

2742

attrname = request[1]

2826

2743

value = request[2]

2827

2744

setattr(client_object, attrname, value)

2832

2749

def rfc3339_duration_to_delta(duration):

2833

2750

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

2834

2751

2835

>>> timedelta = datetime.timedelta

2836

>>> rfc3339_duration_to_delta("P7D") == timedelta(7)

2837

True

2838

>>> rfc3339_duration_to_delta("PT60S") == timedelta(0, 60)

2839

True

2840

>>> rfc3339_duration_to_delta("PT60M") == timedelta(0, 3600)

2841

True

2842

>>> rfc3339_duration_to_delta("PT24H") == timedelta(1)

2843

True

2844

>>> rfc3339_duration_to_delta("P1W") == timedelta(7)

2845

True

2846

>>> rfc3339_duration_to_delta("PT5M30S") == timedelta(0, 330)

2847

True

2848

>>> rfc3339_duration_to_delta("P1DT3M20S") == timedelta(1, 200)

2849

True

2850

>>> del timedelta

2752

>>> rfc3339_duration_to_delta("P7D")

2753

datetime.timedelta(7)

2754

>>> rfc3339_duration_to_delta("PT60S")

2755

datetime.timedelta(0, 60)

2756

>>> rfc3339_duration_to_delta("PT60M")

2757

datetime.timedelta(0, 3600)

2758

>>> rfc3339_duration_to_delta("PT24H")

2759

datetime.timedelta(1)

2760

>>> rfc3339_duration_to_delta("P1W")

2761

datetime.timedelta(7)

2762

>>> rfc3339_duration_to_delta("PT5M30S")

2763

datetime.timedelta(0, 330)

2764

>>> rfc3339_duration_to_delta("P1DT3M20S")

2765

datetime.timedelta(1, 200)

2851

2766

"""

2852

2767

2853

2768

# Parsing an RFC 3339 duration with regular expressions is not

2933

2848

def string_to_delta(interval):

2934

2849

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

2935

2850

2936

>>> string_to_delta("7d") == datetime.timedelta(7)

2937

True

2938

>>> string_to_delta("60s") == datetime.timedelta(0, 60)

2939

True

2940

>>> string_to_delta("60m") == datetime.timedelta(0, 3600)

2941

True

2942

>>> string_to_delta("24h") == datetime.timedelta(1)

2943

True

2944

>>> string_to_delta("1w") == datetime.timedelta(7)

2945

True

2946

>>> string_to_delta("5m 30s") == datetime.timedelta(0, 330)

2947

True

2851

>>> string_to_delta('7d')

2852

datetime.timedelta(7)

2853

>>> string_to_delta('60s')

2854

datetime.timedelta(0, 60)

2855

>>> string_to_delta('60m')

2856

datetime.timedelta(0, 3600)

2857

>>> string_to_delta('24h')

2858

datetime.timedelta(1)

2859

>>> string_to_delta('1w')

2860

datetime.timedelta(7)

2861

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

2862

datetime.timedelta(0, 330)

2948

2863

"""

2949

2864

2950

2865

try:

3052

2967

3053

2968

options = parser.parse_args()

3054

2969

2970

if options.check:

2971

import doctest

2972

fail_count, test_count = doctest.testmod()

2973

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

2974

3055

2975

# Default values for config file for server-global settings

3056

2976

if gnutls.has_rawpk:

3057

2977

priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"

3077

2997

del priority

3078

2998

3079

2999

# Parse config file for server-global settings

3080

server_config = configparser.ConfigParser(server_defaults)

3000

server_config = configparser.SafeConfigParser(server_defaults)

3081

3001

del server_defaults

3082

3002

server_config.read(os.path.join(options.configdir, "mandos.conf"))

3083

# Convert the ConfigParser object to a dict

3003

# Convert the SafeConfigParser object to a dict

3084

3004

server_settings = server_config.defaults()

3085

3005

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

3086

3006

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

3153

3073

3154

3074

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

3155

3075

syslogger.setFormatter(

3156

logging.Formatter("Mandos ({}) [%(process)d]:"

3157

" %(levelname)s: %(message)s".format(

3076

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

3077

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

3158

3078

server_settings["servicename"])))

3159

3079

3160

3080

# Parse config file with clients

3161

client_config = configparser.ConfigParser(Client.client_defaults)

3081

client_config = configparser.SafeConfigParser(Client

3082

.client_defaults)

3162

3083

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

3163

3084

"clients.conf"))

3164

3085

3184

3105

try:

3185

3106

pidfile = codecs.open(pidfilename, "w", encoding="utf-8")

3186

3107

except IOError as e:

3187

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

3188

exc_info=e)

3108

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

3109

exc_info=e)

3189

3110

3190

3111

for name, group in (("_mandos", "_mandos"),

3191

3112

("mandos", "mandos"),

3202

3123

try:

3203

3124

os.setgid(gid)

3204

3125

os.setuid(uid)

3205

log.debug("Did setuid/setgid to %s:%s", uid, gid)

3126

if debug:

3127

logger.debug("Did setuid/setgid to {}:{}".format(uid,

3128

gid))

3206

3129

except OSError as error:

3207

log.warning("Failed to setuid/setgid to %s:%s: %s", uid, gid,

3208

os.strerror(error.errno))

3130

logger.warning("Failed to setuid/setgid to {}:{}: {}"

3131

.format(uid, gid, os.strerror(error.errno)))

3209

3132

if error.errno != errno.EPERM:

3210

3133

raise

3211

3134

3218

3141

3219

3142

@gnutls.log_func

3220

3143

def debug_gnutls(level, string):

3221

log.debug("GnuTLS: %s",

3222

string[:-1].decode("utf-8", errors="replace"))

3144

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

3223

3145

3224

3146

gnutls.global_set_log_function(debug_gnutls)

3225

3147

3234

3156

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

3235

3157

daemon()

3236

3158

3237

if gi.version_info < (3, 10, 2):

3238

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

3239

# need to inform GLib that threads will be used.

3240

GLib.threads_init()

3159

# multiprocessing will use threads, so before we use GLib we need

3160

# to inform GLib that threads will be used.

3161

GLib.threads_init()

3241

3162

3242

3163

global main_loop

3243

3164

# From the Avahi example code

3244

3165

DBusGMainLoop(set_as_default=True)

3245

3166

main_loop = GLib.MainLoop()

3246

if use_dbus or zeroconf:

3247

bus = dbus.SystemBus()

3167

bus = dbus.SystemBus()

3248

3168

# End of Avahi example code

3249

3169

if use_dbus:

3250

3170

try:

3255

3175

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

3256

3176

do_not_queue=True)

3257

3177

except dbus.exceptions.DBusException as e:

3258

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

3178

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

3259

3179

use_dbus = False

3260

3180

server_settings["use_dbus"] = False

3261

3181

tcp_server.use_dbus = False

3320

3240

if isinstance(s, bytes)

3321

3241

else s) for s in

3322

3242

value["client_structure"]]

3323

# .name, .host, and .checker_command

3324

for k in ("name", "host", "checker_command"):

3243

# .name & .host

3244

for k in ("name", "host"):

3325

3245

if isinstance(value[k], bytes):

3326

3246

value[k] = value[k].decode("utf-8")

3327

if "key_id" not in value:

3247

if not value.has_key("key_id"):

3328

3248

value["key_id"] = ""

3329

elif "fingerprint" not in value:

3249

elif not value.has_key("fingerprint"):

3330

3250

value["fingerprint"] = ""

3331

3251

# old_client_settings

3332

3252

# .keys()

3337

3257

for key, value in

3338

3258

bytes_old_client_settings.items()}

3339

3259

del bytes_old_client_settings

3340

# .host and .checker_command

3260

# .host

3341

3261

for value in old_client_settings.values():

3342

for attribute in ("host", "checker_command"):

3343

if isinstance(value[attribute], bytes):

3344

value[attribute] = (value[attribute]

3345

.decode("utf-8"))

3262

if isinstance(value["host"], bytes):

3263

value["host"] = (value["host"]

3264

.decode("utf-8"))

3346

3265

os.remove(stored_state_path)

3347

3266

except IOError as e:

3348

3267

if e.errno == errno.ENOENT:

3349

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

3350

" %s", os.strerror(e.errno))

3268

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

3269

" {}".format(os.strerror(e.errno)))

3351

3270

else:

3352

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

3353

exc_info=e)

3271

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

3272

exc_info=e)

3354

3273

raise

3355

3274

except EOFError as e:

3356

log.warning("Could not load persistent state: EOFError:",

3357

exc_info=e)

3275

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

3276

"EOFError:",

3277

exc_info=e)

3358

3278

3359

3279

with PGPEngine() as pgp:

3360

3280

for client_name, client in clients_data.items():

3387

3307

if client["enabled"]:

3388

3308

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

3389

3309

if not client["last_checked_ok"]:

3390

log.warning("disabling client %s - Client"

3391

" never performed a successful"

3392

" checker", client_name)

3310

logger.warning(

3311

"disabling client {} - Client never "

3312

"performed a successful checker".format(

3313

client_name))

3393

3314

client["enabled"] = False

3394

3315

elif client["last_checker_status"] != 0:

3395

log.warning("disabling client %s - Client"

3396

" last checker failed with error"

3397

" code %s", client_name,

3398

client["last_checker_status"])

3316

logger.warning(

3317

"disabling client {} - Client last"

3318

" checker failed with error code"

3319

" {}".format(

3320

client_name,

3321

client["last_checker_status"]))

3399

3322

client["enabled"] = False

3400

3323

else:

3401

3324

client["expires"] = (

3402

3325

datetime.datetime.utcnow()

3403

3326

+ client["timeout"])

3404

log.debug("Last checker succeeded, keeping %s"

3405

" enabled", client_name)

3327

logger.debug("Last checker succeeded,"

3328

" keeping {} enabled".format(

3329

client_name))

3406

3330

try:

3407

3331

client["secret"] = pgp.decrypt(

3408

3332

client["encrypted_secret"],

3409

3333

client_settings[client_name]["secret"])

3410

3334

except PGPError:

3411

3335

# If decryption fails, we use secret from new settings

3412

log.debug("Failed to decrypt %s old secret",

3413

client_name)

3336

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

3337

client_name))

3414

3338

client["secret"] = (client_settings[client_name]

3415

3339

["secret"])

3416

3340

3430

3354

server_settings=server_settings)

3431

3355

3432

3356

if not tcp_server.clients:

3433

log.warning("No clients defined")

3357

logger.warning("No clients defined")

3434

3358

3435

3359

if not foreground:

3436

3360

if pidfile is not None:

3439

3363

with pidfile:

3440

3364

print(pid, file=pidfile)

3441

3365

except IOError:

3442

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

3443

pidfilename, pid)

3366

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

3367

pidfilename, pid)

3444

3368

del pidfile

3445

3369

del pidfilename

3446

3370

3596

3520

3597

3521

try:

3598

3522

with tempfile.NamedTemporaryFile(

3599

mode="wb",

3523

mode='wb',

3600

3524

suffix=".pickle",

3601

prefix="clients-",

3525

prefix='clients-',

3602

3526

dir=os.path.dirname(stored_state_path),

3603

3527

delete=False) as stored_state:

3604

3528

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

3612

3536

except NameError:

3613

3537

pass

3614

3538

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

3615

log.warning("Could not save persistent state: %s",

3616

os.strerror(e.errno))

3539

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

3540

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

3617

3541

else:

3618

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

3619

exc_info=e)

3542

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

3543

exc_info=e)

3620

3544

raise

3621

3545

3622

3546

# Delete all clients, and settings from config

3639

3563

mandos_dbus_service.client_added_signal(client)

3640

3564

# Need to initiate checking of clients

3641

3565

if client.enabled:

3642

client.init_checker(randomize_start=True)

3566

client.init_checker()

3643

3567

3644

3568

tcp_server.enable()

3645

3569

tcp_server.server_activate()

3648

3572

if zeroconf:

3649

3573

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

3650

3574

if use_ipv6:

3651

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

3652

" scope_id %d", *tcp_server.socket.getsockname())

3575

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

3576

" flowinfo %d, scope_id %d",

3577

*tcp_server.socket.getsockname())

3653

3578

else: # IPv4

3654

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

3655

*tcp_server.socket.getsockname())

3579

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

3580

*tcp_server.socket.getsockname())

3656

3581

3657

3582

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

3658

3583

3662

3587

try:

3663

3588

service.activate()

3664

3589

except dbus.exceptions.DBusException as error:

3665

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

3590

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

3666

3591

cleanup()

3667

3592

sys.exit(1)

3668

3593

# End of Avahi example code

3669

3594

3670

GLib.io_add_watch(

3671

GLib.IOChannel.unix_new(tcp_server.fileno()),

3672

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3673

lambda *args, **kwargs: (tcp_server.handle_request

3674

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

3595

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

3596

lambda *args, **kwargs:

3597

(tcp_server.handle_request

3598

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

3675

3599

3676

log.debug("Starting main loop")

3600

logger.debug("Starting main loop")

3677

3601

main_loop.run()

3678

3602

except AvahiError as error:

3679

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

3603

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

3680

3604

cleanup()

3681

3605

sys.exit(1)

3682

3606

except KeyboardInterrupt:

3683

3607

if debug:

3684

3608

print("", file=sys.stderr)

3685

log.debug("Server received KeyboardInterrupt")

3686

log.debug("Server exiting")

3609

logger.debug("Server received KeyboardInterrupt")

3610

logger.debug("Server exiting")

3687

3611

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

3688

3612

cleanup()

3689

3613

3690

3691

def parse_test_args():

3692

# type: () -> argparse.Namespace

3693

parser = argparse.ArgumentParser(add_help=False)

3694

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

3695

parser.add_argument("--prefix", )

3696

args, unknown_args = parser.parse_known_args()

3697

if args.check:

3698

# Remove test options from sys.argv

3699

sys.argv[1:] = unknown_args

3700

return args

3701

3702

# Add all tests from doctest strings

3703

def load_tests(loader, tests, none):

3704

import doctest

3705

tests.addTests(doctest.DocTestSuite())

3706

return tests

3707

3708

if __name__ == "__main__":

3709

options = parse_test_args()

3710

try:

3711

if options.check:

3712

extra_test_prefix = options.prefix

3713

if extra_test_prefix is not None:

3714

if not (unittest.main(argv=[""], exit=False)

3715

.result.wasSuccessful()):

3716

sys.exit(1)

3717

class ExtraTestLoader(unittest.TestLoader):

3718

testMethodPrefix = extra_test_prefix

3719

# Call using ./scriptname --test [--verbose]

3720

unittest.main(argv=[""], testLoader=ExtraTestLoader())

3721

else:

3722

unittest.main(argv=[""])

3723

else:

3724

main()

3725

finally:

3726

logging.shutdown()

3727

3728

# Local Variables:

3729

# run-tests:

3730

# (lambda (&optional extra)

3731

# (if (not (funcall run-tests-in-test-buffer default-directory

3732

# extra))

3733

# (funcall show-test-buffer-in-test-window)

3734

# (funcall remove-test-window)

3735

# (if extra (message "Extra tests run successfully!"))))

3736

# run-tests-in-test-buffer:

3737

# (lambda (dir &optional extra)

3738

# (with-current-buffer (get-buffer-create "*Test*")

3739

# (setq buffer-read-only nil

3740

# default-directory dir)

3741

# (erase-buffer)

3742

# (compilation-mode))

3743

# (let ((process-result

3744

# (let ((inhibit-read-only t))

3745

# (process-file-shell-command

3746

# (funcall get-command-line extra) nil "*Test*"))))

3747

# (and (numberp process-result)

3748

# (= process-result 0))))

3749

# get-command-line:

3750

# (lambda (&optional extra)

3751

# (let ((quoted-script

3752

# (shell-quote-argument (funcall get-script-name))))

3753

# (format

3754

# (concat "%s --check" (if extra " --prefix=atest" ""))

3755

# quoted-script)))

3756

# get-script-name:

3757

# (lambda ()

3758

# (if (fboundp 'file-local-name)

3759

# (file-local-name (buffer-file-name))

3760

# (or (file-remote-p (buffer-file-name) 'localname)

3761

# (buffer-file-name))))

3762

# remove-test-window:

3763

# (lambda ()

3764

# (let ((test-window (get-buffer-window "*Test*")))

3765

# (if test-window (delete-window test-window))))

3766

# show-test-buffer-in-test-window:

3767

# (lambda ()

3768

# (when (not (get-buffer-window-list "*Test*"))

3769

# (setq next-error-last-buffer (get-buffer "*Test*"))

3770

# (let* ((side (if (>= (window-width) 146) 'right 'bottom))

3771

# (display-buffer-overriding-action

3772

# `((display-buffer-in-side-window) (side . ,side)

3773

# (window-height . fit-window-to-buffer)

3774

# (window-width . fit-window-to-buffer))))

3775

# (display-buffer "*Test*"))))

3776

# eval:

3777

# (progn

3778

# (let* ((run-extra-tests (lambda () (interactive)

3779

# (funcall run-tests t)))

3780

# (inner-keymap `(keymap (116 . ,run-extra-tests))) ; t

3781

# (outer-keymap `(keymap (3 . ,inner-keymap)))) ; C-c

3782

# (setq minor-mode-overriding-map-alist

3783

# (cons `(run-tests . ,outer-keymap)

3784

# minor-mode-overriding-map-alist)))

3785

# (add-hook 'after-save-hook run-tests 90 t))

3786

# End:

3614

3615

if __name__ == '__main__':

3616

main()