/mandos/trunk : revision 1156

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

92

90

93

91

if sys.version_info.major == 2:

94

92

__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

# Add os.set_inheritable if it does not exist

114

try:

115

os.set_inheritable

116

except AttributeError:

117

def set_inheritable(fd, inheritable):

118

flags = fcntl.fcntl(fd, fcntl.F_GETFD)

119

if inheritable and ((flags & fcntl.FD_CLOEXEC) != 0):

120

fcntl.fcntl(fd, fcntl.F_SETFL, flags & ~fcntl.FD_CLOEXEC)

121

elif (not inheritable) and ((flags & fcntl.FD_CLOEXEC) == 0):

122

fcntl.fcntl(fd, fcntl.F_SETFL, flags | fcntl.FD_CLOEXEC)

123

os.set_inheritable = set_inheritable

124

del set_inheritable

125

126

# Show warnings by default

127

if not sys.warnoptions:

128

import warnings

129

warnings.simplefilter("default")

130

93

131

94

# Try to find the value of SO_BINDTODEVICE:

132

95

try:

153

116

# No value found

154

117

SO_BINDTODEVICE = None

155

118

119

if sys.version_info.major == 2:

120

str = unicode

121

156

122

if sys.version_info < (3, 2):

157

123

configparser.Configparser = configparser.SafeConfigParser

158

124

159

version = "1.8.17"

125

version = "1.8.7"

160

126

stored_state_file = "clients.pickle"

161

127

162

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

163

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

128

logger = logging.getLogger()

164

129

syslogger = None

165

130

166

131

try:

202

167

facility=logging.handlers.SysLogHandler.LOG_DAEMON,

203

168

address="/dev/log"))

204

169

syslogger.setFormatter(logging.Formatter

205

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

206

" %(message)s"))

207

log.addHandler(syslogger)

170

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

171

' %(message)s'))

172

logger.addHandler(syslogger)

208

173

209

174

if debug:

210

175

console = logging.StreamHandler()

211

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

212

" [%(process)d]:"

213

" %(levelname)s:"

214

" %(message)s"))

215

log.addHandler(console)

216

log.setLevel(level)

176

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

177

' [%(process)d]:'

178

' %(levelname)s:'

179

' %(message)s'))

180

logger.addHandler(console)

181

logger.setLevel(level)

217

182

218

183

219

184

class PGPError(Exception):

231

196

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

232

197

for line in output.splitlines():

233

198

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

234

if name == b"gpg":

199

if name == "gpg":

235

200

self.gpg = path

236

201

break

237

202

except OSError as e:

238

203

if e.errno != errno.ENOENT:

239

204

raise

240

self.gnupgargs = ["--batch",

241

"--homedir", self.tempdir,

242

"--force-mdc",

243

"--quiet"]

205

self.gnupgargs = ['--batch',

206

'--homedir', self.tempdir,

207

'--force-mdc',

208

'--quiet']

244

209

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

245

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

210

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

246

211

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

247

212

248

213

def __enter__(self):

285

250

dir=self.tempdir) as passfile:

286

251

passfile.write(passphrase)

287

252

passfile.flush()

288

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

289

"--passphrase-file",

253

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

254

'--passphrase-file',

290

255

passfile.name]

291

256

+ self.gnupgargs,

292

257

stdin=subprocess.PIPE,

303

268

dir=self.tempdir) as passfile:

304

269

passfile.write(passphrase)

305

270

passfile.flush()

306

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

307

"--passphrase-file",

271

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

272

'--passphrase-file',

308

273

passfile.name]

309

274

+ self.gnupgargs,

310

275

stdin=subprocess.PIPE,

363

328

Attributes:

364

329

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

365

330

Used to optionally bind to the specified interface.

366

name: string; Example: "Mandos"

367

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

331

name: string; Example: 'Mandos'

332

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

368

333

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

369

334

port: integer; what port to announce

370

335

TXT: list of strings; TXT record for the service

407

372

def rename(self, remove=True):

408

373

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

409

374

if self.rename_count >= self.max_renames:

410

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

411

" after %i retries, exiting.",

412

self.rename_count)

375

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

376

" after %i retries, exiting.",

377

self.rename_count)

413

378

raise AvahiServiceError("Too many renames")

414

379

self.name = str(

415

380

self.server.GetAlternativeServiceName(self.name))

416

381

self.rename_count += 1

417

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

418

self.name)

382

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

383

self.name)

419

384

if remove:

420

385

self.remove()

421

386

try:

423

388

except dbus.exceptions.DBusException as error:

424

389

if (error.get_dbus_name()

425

390

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

426

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

391

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

427

392

return self.rename(remove=False)

428

393

else:

429

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

394

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

430

395

self.cleanup()

431

396

os._exit(1)

432

397

448

413

avahi.DBUS_INTERFACE_ENTRY_GROUP)

449

414

self.entry_group_state_changed_match = (

450

415

self.group.connect_to_signal(

451

"StateChanged", self.entry_group_state_changed))

452

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

453

self.name, self.type)

416

'StateChanged', self.entry_group_state_changed))

417

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

418

self.name, self.type)

454

419

self.group.AddService(

455

420

self.interface,

456

421

self.protocol,

463

428

464

429

def entry_group_state_changed(self, state, error):

465

430

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

466

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

431

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

467

432

468

433

if state == avahi.ENTRY_GROUP_ESTABLISHED:

469

log.debug("Zeroconf service established.")

434

logger.debug("Zeroconf service established.")

470

435

elif state == avahi.ENTRY_GROUP_COLLISION:

471

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

436

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

472

437

self.rename()

473

438

elif state == avahi.ENTRY_GROUP_FAILURE:

474

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

475

str(error))

439

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

440

str(error))

476

441

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

477

442

478

443

def cleanup(self):

488

453

489

454

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

490

455

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

491

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

456

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

492

457

bad_states = {

493

458

avahi.SERVER_INVALID: "Zeroconf server invalid",

494

459

avahi.SERVER_REGISTERING: None,

498

463

if state in bad_states:

499

464

if bad_states[state] is not None:

500

465

if error is None:

501

log.error(bad_states[state])

466

logger.error(bad_states[state])

502

467

else:

503

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

468

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

504

469

self.cleanup()

505

470

elif state == avahi.SERVER_RUNNING:

506

471

try:

508

473

except dbus.exceptions.DBusException as error:

509

474

if (error.get_dbus_name()

510

475

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

511

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

476

logger.info("Local Zeroconf service name"

477

" collision.")

512

478

return self.rename(remove=False)

513

479

else:

514

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

480

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

515

481

self.cleanup()

516

482

os._exit(1)

517

483

else:

518

484

if error is None:

519

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

485

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

520

486

else:

521

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

487

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

522

488

523

489

def activate(self):

524

490

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

536

502

class AvahiServiceToSyslog(AvahiService):

537

503

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

538

504

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

539

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

540

**kwargs)

505

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

541

506

syslogger.setFormatter(logging.Formatter(

542

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

507

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

543

508

.format(self.name)))

544

509

return ret

545

510

575

540

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

576

541

577

542

# Types

578

class _session_int(ctypes.Structure):

543

class session_int(ctypes.Structure):

579

544

_fields_ = []

580

session_t = ctypes.POINTER(_session_int)

545

session_t = ctypes.POINTER(session_int)

581

546

582

547

class certificate_credentials_st(ctypes.Structure):

583

548

_fields_ = []

586

551

certificate_type_t = ctypes.c_int

587

552

588

553

class datum_t(ctypes.Structure):

589

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

590

("size", ctypes.c_uint)]

554

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

555

('size', ctypes.c_uint)]

591

556

592

class _openpgp_crt_int(ctypes.Structure):

557

class openpgp_crt_int(ctypes.Structure):

593

558

_fields_ = []

594

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

559

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

595

560

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

596

561

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

597

562

credentials_type_t = ctypes.c_int

606

571

# gnutls.strerror()

607

572

self.code = code

608

573

if message is None and code is not None:

609

message = gnutls.strerror(code).decode(

610

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

574

message = gnutls.strerror(code)

611

575

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

612

576

message, *args)

613

577

614

578

class CertificateSecurityError(Error):

615

579

pass

616

580

617

class PointerTo:

618

def __init__(self, cls):

619

self.cls = cls

620

621

def from_param(self, obj):

622

if not isinstance(obj, self.cls):

623

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

624

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

625

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

626

627

class CastToVoidPointer:

628

def __init__(self, cls):

629

self.cls = cls

630

631

def from_param(self, obj):

632

if not isinstance(obj, self.cls):

633

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

634

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

635

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

636

637

class With_from_param:

638

@classmethod

639

def from_param(cls, obj):

640

return obj._as_parameter_

641

642

581

# Classes

643

class Credentials(With_from_param):

582

class Credentials:

644

583

def __init__(self):

645

self._as_parameter_ = gnutls.certificate_credentials_t()

646

gnutls.certificate_allocate_credentials(self)

584

self._c_object = gnutls.certificate_credentials_t()

585

gnutls.certificate_allocate_credentials(

586

ctypes.byref(self._c_object))

647

587

self.type = gnutls.CRD_CERTIFICATE

648

588

649

589

def __del__(self):

650

gnutls.certificate_free_credentials(self)

590

gnutls.certificate_free_credentials(self._c_object)

651

591

652

class ClientSession(With_from_param):

592

class ClientSession:

653

593

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

654

self._as_parameter_ = gnutls.session_t()

594

self._c_object = gnutls.session_t()

655

595

gnutls_flags = gnutls.CLIENT

656

596

if gnutls.check_version(b"3.5.6"):

657

597

gnutls_flags |= gnutls.NO_TICKETS

658

598

if gnutls.has_rawpk:

659

599

gnutls_flags |= gnutls.ENABLE_RAWPK

660

gnutls.init(self, gnutls_flags)

600

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

661

601

del gnutls_flags

662

gnutls.set_default_priority(self)

663

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

664

gnutls.handshake_set_private_extensions(self, True)

602

gnutls.set_default_priority(self._c_object)

603

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

604

gnutls.handshake_set_private_extensions(self._c_object,

605

True)

665

606

self.socket = socket

666

607

if credentials is None:

667

608

credentials = gnutls.Credentials()

668

gnutls.credentials_set(self, credentials.type,

669

credentials)

609

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

610

ctypes.cast(credentials._c_object,

611

ctypes.c_void_p))

670

612

self.credentials = credentials

671

613

672

614

def __del__(self):

673

gnutls.deinit(self)

615

gnutls.deinit(self._c_object)

674

616

675

617

def handshake(self):

676

return gnutls.handshake(self)

618

return gnutls.handshake(self._c_object)

677

619

678

620

def send(self, data):

679

621

data = bytes(data)

680

622

data_len = len(data)

681

623

while data_len > 0:

682

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

624

data_len -= gnutls.record_send(self._c_object,

625

data[-data_len:],

683

626

data_len)

684

627

685

628

def bye(self):

686

return gnutls.bye(self, gnutls.SHUT_RDWR)

629

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

687

630

688

631

# Error handling functions

689

632

def _error_code(result):

690

633

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

691

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

692

if result >= gnutls.E_SUCCESS:

634

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

635

if result >= 0:

693

636

return result

694

637

if result == gnutls.E_NO_CERTIFICATE_FOUND:

695

638

raise gnutls.CertificateSecurityError(code=result)

696

639

raise gnutls.Error(code=result)

697

640

698

def _retry_on_error(result, func, arguments,

699

_error_code=_error_code):

641

def _retry_on_error(result, func, arguments):

700

642

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

701

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

702

while result < gnutls.E_SUCCESS:

643

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

644

while result < 0:

703

645

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

704

646

return _error_code(result)

705

647

result = func(*arguments)

710

652

711

653

# Functions

712

654

priority_set_direct = _library.gnutls_priority_set_direct

713

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

655

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

714

656

ctypes.POINTER(ctypes.c_char_p)]

715

657

priority_set_direct.restype = _error_code

716

658

717

659

init = _library.gnutls_init

718

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

660

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

719

661

init.restype = _error_code

720

662

721

663

set_default_priority = _library.gnutls_set_default_priority

722

set_default_priority.argtypes = [ClientSession]

664

set_default_priority.argtypes = [session_t]

723

665

set_default_priority.restype = _error_code

724

666

725

667

record_send = _library.gnutls_record_send

726

record_send.argtypes = [ClientSession, ctypes.c_void_p,

668

record_send.argtypes = [session_t, ctypes.c_void_p,

727

669

ctypes.c_size_t]

728

670

record_send.restype = ctypes.c_ssize_t

729

671

record_send.errcheck = _retry_on_error

731

673

certificate_allocate_credentials = (

732

674

_library.gnutls_certificate_allocate_credentials)

733

675

certificate_allocate_credentials.argtypes = [

734

PointerTo(Credentials)]

676

ctypes.POINTER(certificate_credentials_t)]

735

677

certificate_allocate_credentials.restype = _error_code

736

678

737

679

certificate_free_credentials = (

738

680

_library.gnutls_certificate_free_credentials)

739

certificate_free_credentials.argtypes = [Credentials]

681

certificate_free_credentials.argtypes = [

682

certificate_credentials_t]

740

683

certificate_free_credentials.restype = None

741

684

742

685

handshake_set_private_extensions = (

743

686

_library.gnutls_handshake_set_private_extensions)

744

handshake_set_private_extensions.argtypes = [ClientSession,

687

handshake_set_private_extensions.argtypes = [session_t,

745

688

ctypes.c_int]

746

689

handshake_set_private_extensions.restype = None

747

690

748

691

credentials_set = _library.gnutls_credentials_set

749

credentials_set.argtypes = [ClientSession, credentials_type_t,

750

CastToVoidPointer(Credentials)]

692

credentials_set.argtypes = [session_t, credentials_type_t,

693

ctypes.c_void_p]

751

694

credentials_set.restype = _error_code

752

695

753

696

strerror = _library.gnutls_strerror

755

698

strerror.restype = ctypes.c_char_p

756

699

757

700

certificate_type_get = _library.gnutls_certificate_type_get

758

certificate_type_get.argtypes = [ClientSession]

701

certificate_type_get.argtypes = [session_t]

759

702

certificate_type_get.restype = _error_code

760

703

761

704

certificate_get_peers = _library.gnutls_certificate_get_peers

762

certificate_get_peers.argtypes = [ClientSession,

705

certificate_get_peers.argtypes = [session_t,

763

706

ctypes.POINTER(ctypes.c_uint)]

764

707

certificate_get_peers.restype = ctypes.POINTER(datum_t)

765

708

772

715

global_set_log_function.restype = None

773

716

774

717

deinit = _library.gnutls_deinit

775

deinit.argtypes = [ClientSession]

718

deinit.argtypes = [session_t]

776

719

deinit.restype = None

777

720

778

721

handshake = _library.gnutls_handshake

779

handshake.argtypes = [ClientSession]

780

handshake.restype = ctypes.c_int

722

handshake.argtypes = [session_t]

723

handshake.restype = _error_code

781

724

handshake.errcheck = _retry_on_error

782

725

783

726

transport_set_ptr = _library.gnutls_transport_set_ptr

784

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

727

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

785

728

transport_set_ptr.restype = None

786

729

787

730

bye = _library.gnutls_bye

788

bye.argtypes = [ClientSession, close_request_t]

789

bye.restype = ctypes.c_int

731

bye.argtypes = [session_t, close_request_t]

732

bye.restype = _error_code

790

733

bye.errcheck = _retry_on_error

791

734

792

735

check_version = _library.gnutls_check_version

809

752

810

753

x509_crt_fmt_t = ctypes.c_int

811

754

812

# All the function declarations below are from

813

# gnutls/abstract.h

755

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

814

756

pubkey_init = _library.gnutls_pubkey_init

815

757

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

816

758

pubkey_init.restype = _error_code

830

772

pubkey_deinit.argtypes = [pubkey_t]

831

773

pubkey_deinit.restype = None

832

774

else:

833

# All the function declarations below are from

834

# gnutls/openpgp.h

775

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

835

776

836

777

openpgp_crt_init = _library.gnutls_openpgp_crt_init

837

778

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

843

784

openpgp_crt_fmt_t]

844

785

openpgp_crt_import.restype = _error_code

845

786

846

openpgp_crt_verify_self = \

847

_library.gnutls_openpgp_crt_verify_self

848

openpgp_crt_verify_self.argtypes = [

849

openpgp_crt_t,

850

ctypes.c_uint,

851

ctypes.POINTER(ctypes.c_uint),

852

]

787

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

788

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

789

ctypes.POINTER(ctypes.c_uint)]

853

790

openpgp_crt_verify_self.restype = _error_code

854

791

855

792

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

866

803

867

804

if check_version(b"3.6.4"):

868

805

certificate_type_get2 = _library.gnutls_certificate_type_get2

869

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

806

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

870

807

certificate_type_get2.restype = _error_code

871

808

872

809

# Remove non-public functions

888

825

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

889

826

890

827

Attributes:

891

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

828

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

892

829

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

893

830

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

894

831

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

895

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

832

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

896

833

running.

897

834

checker_callback_tag: a GLib event source tag, or None

898

835

checker_command: string; External command which is run to check

974

911

# key_id() and fingerprint() functions

975

912

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

976

913

.replace(" ", ""))

977

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

978

"").upper()

914

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

979

915

.replace(" ", ""))

980

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

981

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

982

" fingerprint", client_name)

983

del settings[client_name]

984

continue

985

916

if "secret" in section:

986

917

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

987

918

.encode("utf-8"),

1028

959

self.last_enabled = None

1029

960

self.expires = None

1030

961

1031

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

1032

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

1033

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

962

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

963

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

964

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

1034

965

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

1035

966

datetime.datetime.utcnow())

1036

967

1064

995

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

1065

996

# Already enabled

1066

997

return

998

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

1067

999

self.enabled = True

1068

1000

self.last_enabled = datetime.datetime.utcnow()

1069

1001

self.init_checker()

1074

1006

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

1075

1007

return False

1076

1008

if not quiet:

1077

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

1009

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

1078

1010

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

1079

1011

GLib.source_remove(self.disable_initiator_tag)

1080

1012

self.disable_initiator_tag = None

1092

1024

def __del__(self):

1093

1025

self.disable()

1094

1026

1095

def init_checker(self, randomize_start=False):

1096

# Schedule a new checker to be started a randomly selected

1097

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

1098

# the startup of checkers over time when the server is

1099

# started.

1027

def init_checker(self):

1028

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

1029

# and every interval from then on.

1100

1030

if self.checker_initiator_tag is not None:

1101

1031

GLib.source_remove(self.checker_initiator_tag)

1102

interval_milliseconds = int(self.interval.total_seconds()

1103

* 1000)

1104

if randomize_start:

1105

delay_milliseconds = random.randrange(

1106

interval_milliseconds + 1)

1107

else:

1108

delay_milliseconds = interval_milliseconds

1109

1032

self.checker_initiator_tag = GLib.timeout_add(

1110

delay_milliseconds, self.start_checker, randomize_start)

1111

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

1112

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

1113

# expire at the soonest one interval after a checker was

1114

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

1115

# time might have to be extended.

1116

now = datetime.datetime.utcnow()

1117

self.expires = now + delay + self.interval

1118

# Schedule a disable() at expire time

1033

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

1034

self.start_checker)

1035

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

1119

1036

if self.disable_initiator_tag is not None:

1120

1037

GLib.source_remove(self.disable_initiator_tag)

1121

1038

self.disable_initiator_tag = GLib.timeout_add(

1122

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

1123

self.disable)

1039

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

1040

# Also start a new checker *right now*.

1041

self.start_checker()

1124

1042

1125

1043

def checker_callback(self, source, condition, connection,

1126

1044

command):

1128

1046

# Read return code from connection (see call_pipe)

1129

1047

returncode = connection.recv()

1130

1048

connection.close()

1131

if self.checker is not None:

1132

self.checker.join()

1049

self.checker.join()

1133

1050

self.checker_callback_tag = None

1134

1051

self.checker = None

1135

1052

1137

1054

self.last_checker_status = returncode

1138

1055

self.last_checker_signal = None

1139

1056

if self.last_checker_status == 0:

1140

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

1057

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

1058

vars(self))

1141

1059

self.checked_ok()

1142

1060

else:

1143

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

1061

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

1144

1062

else:

1145

1063

self.last_checker_status = -1

1146

1064

self.last_checker_signal = -returncode

1147

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

1065

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

1066

vars(self))

1148

1067

return False

1149

1068

1150

1069

def checked_ok(self):

1169

1088

def need_approval(self):

1170

1089

self.last_approval_request = datetime.datetime.utcnow()

1171

1090

1172

def start_checker(self, start_was_randomized=False):

1091

def start_checker(self):

1173

1092

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

1174

1093

1175

1094

If a checker already exists, leave it running and do

1184

1103

# should be.

1185

1104

1186

1105

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

1187

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

1106

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

1188

1107

self.checker.join()

1189

1108

self.checker = None

1190

1109

# Start a new checker if needed

1191

1110

if self.checker is None:

1192

1111

# Escape attributes for the shell

1193

1112

escaped_attrs = {

1194

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

1113

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

1195

1114

for attr in self.runtime_expansions}

1196

1115

try:

1197

1116

command = self.checker_command % escaped_attrs

1198

1117

except TypeError as error:

1199

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

1200

self.checker_command, exc_info=error)

1118

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

1119

self.checker_command,

1120

exc_info=error)

1201

1121

return True # Try again later

1202

1122

self.current_checker_command = command

1203

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

1123

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

1124

self.name)

1204

1125

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

1205

1126

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

1206

1127

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

1222

1143

kwargs=popen_args)

1223

1144

self.checker.start()

1224

1145

self.checker_callback_tag = GLib.io_add_watch(

1225

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

1226

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1146

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

1227

1147

self.checker_callback, pipe[0], command)

1228

if start_was_randomized:

1229

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

1230

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

1231

# interval from then on.

1232

now = datetime.datetime.utcnow()

1233

self.checker_initiator_tag = GLib.timeout_add(

1234

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

1235

self.start_checker)

1236

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

1237

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

1238

return False

1239

1148

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

1240

1149

return True

1241

1150

1246

1155

self.checker_callback_tag = None

1247

1156

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

1248

1157

return

1249

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

1158

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

1250

1159

self.checker.terminate()

1251

1160

self.checker = None

1252

1161

1279

1188

func._dbus_name = func.__name__

1280

1189

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

1281

1190

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

1282

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1191

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1283

1192

return func

1284

1193

1285

1194

return decorator

1374

1283

1375

1284

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1376

1285

out_signature="s",

1377

path_keyword="object_path",

1378

connection_keyword="connection")

1286

path_keyword='object_path',

1287

connection_keyword='connection')

1379

1288

def Introspect(self, object_path, connection):

1380

1289

"""Overloading of standard D-Bus method.

1381

1290

1430

1339

document.unlink()

1431

1340

except (AttributeError, xml.dom.DOMException,

1432

1341

xml.parsers.expat.ExpatError) as error:

1433

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

1434

exc_info=error)

1342

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

1343

exc_info=error)

1435

1344

return xmlstring

1436

1345

1437

1346

1495

1404

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

1496

1405

"'ay' signature {!r}"

1497

1406

.format(prop._dbus_signature))

1498

value = dbus.ByteArray(bytes(value))

1407

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

1408

for byte in value))

1499

1409

prop(value)

1500

1410

1501

1411

@dbus.service.method(dbus.PROPERTIES_IFACE,

1534

1444

1535

1445

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1536

1446

out_signature="s",

1537

path_keyword="object_path",

1538

connection_keyword="connection")

1447

path_keyword='object_path',

1448

connection_keyword='connection')

1539

1449

def Introspect(self, object_path, connection):

1540

1450

"""Overloading of standard D-Bus method.

1541

1451

1597

1507

document.unlink()

1598

1508

except (AttributeError, xml.dom.DOMException,

1599

1509

xml.parsers.expat.ExpatError) as error:

1600

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

1601

exc_info=error)

1510

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

1511

exc_info=error)

1602

1512

return xmlstring

1603

1513

1604

1514

1636

1546

1637

1547

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1638

1548

out_signature="s",

1639

path_keyword="object_path",

1640

connection_keyword="connection")

1549

path_keyword='object_path',

1550

connection_keyword='connection')

1641

1551

def Introspect(self, object_path, connection):

1642

1552

"""Overloading of standard D-Bus method.

1643

1553

1668

1578

document.unlink()

1669

1579

except (AttributeError, xml.dom.DOMException,

1670

1580

xml.parsers.expat.ExpatError) as error:

1671

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

1672

exc_info=error)

1581

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

1582

exc_info=error)

1673

1583

return xmlstring

1674

1584

1675

1585

2309

2219

class ProxyClient:

2310

2220

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

2311

2221

self._pipe = child_pipe

2312

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

2222

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

2313

2223

if not self._pipe.recv():

2314

2224

raise KeyError(key_id or fpr)

2315

2225

2316

2226

def __getattribute__(self, name):

2317

if name == "_pipe":

2227

if name == '_pipe':

2318

2228

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

2319

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

2229

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

2320

2230

data = self._pipe.recv()

2321

if data[0] == "data":

2231

if data[0] == 'data':

2322

2232

return data[1]

2323

if data[0] == "function":

2233

if data[0] == 'function':

2324

2234

2325

2235

def func(*args, **kwargs):

2326

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

2236

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

2327

2237

return self._pipe.recv()[1]

2328

2238

2329

2239

return func

2330

2240

2331

2241

def __setattr__(self, name, value):

2332

if name == "_pipe":

2242

if name == '_pipe':

2333

2243

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

2334

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

2244

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

2335

2245

2336

2246

2337

2247

class ClientHandler(socketserver.BaseRequestHandler, object):

2342

2252

2343

2253

def handle(self):

2344

2254

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

2345

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

2346

str(self.client_address))

2347

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

2255

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

2256

str(self.client_address))

2257

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

2258

self.server.child_pipe.fileno())

2348

2259

2349

2260

session = gnutls.ClientSession(self.request)

2350

2261

2351

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

2262

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

2352

2263

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

2353

2264

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

2354

2265

# "+DHE-DSS"))

2356

2267

priority = self.server.gnutls_priority

2357

2268

if priority is None:

2358

2269

priority = "NORMAL"

2359

gnutls.priority_set_direct(session,

2360

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

2270

gnutls.priority_set_direct(session._c_object,

2271

priority.encode("utf-8"),

2272

None)

2361

2273

2362

2274

# Start communication using the Mandos protocol

2363

2275

# Get protocol number

2364

2276

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

2365

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

2277

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

2366

2278

try:

2367

2279

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

2368

2280

raise RuntimeError(line)

2369

2281

except (ValueError, IndexError, RuntimeError) as error:

2370

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

2282

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

2371

2283

return

2372

2284

2373

2285

# Start GnuTLS connection

2374

2286

try:

2375

2287

session.handshake()

2376

2288

except gnutls.Error as error:

2377

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

2289

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

2378

2290

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

2379

2291

# established. Just abandon the request.

2380

2292

return

2381

log.debug("Handshake succeeded")

2293

logger.debug("Handshake succeeded")

2382

2294

2383

2295

approval_required = False

2384

2296

try:

2388

2300

key_id = self.key_id(

2389

2301

self.peer_certificate(session))

2390

2302

except (TypeError, gnutls.Error) as error:

2391

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

2303

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

2392

2304

return

2393

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

2394

key_id.decode("utf-8",

2395

errors="replace"))

2305

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

2396

2306

2397

2307

else:

2398

2308

key_id = b""

2400

2310

fpr = self.fingerprint(

2401

2311

self.peer_certificate(session))

2402

2312

except (TypeError, gnutls.Error) as error:

2403

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

2313

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

2404

2314

return

2405

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

2315

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

2406

2316

2407

2317

try:

2408

2318

client = ProxyClient(child_pipe, key_id, fpr,

2417

2327

2418

2328

while True:

2419

2329

if not client.enabled:

2420

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

2330

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

2331

client.name)

2421

2332

if self.server.use_dbus:

2422

2333

# Emit D-Bus signal

2423

2334

client.Rejected("Disabled")

2427

2338

# We are approved or approval is disabled

2428

2339

break

2429

2340

elif client.approved is None:

2430

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

2431

client.name)

2341

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

2342

client.name)

2432

2343

if self.server.use_dbus:

2433

2344

# Emit D-Bus signal

2434

2345

client.NeedApproval(

2435

2346

client.approval_delay.total_seconds()

2436

2347

* 1000, client.approved_by_default)

2437

2348

else:

2438

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

2439

client.name)

2349

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

2350

client.name)

2440

2351

if self.server.use_dbus:

2441

2352

# Emit D-Bus signal

2442

2353

client.Rejected("Denied")

2450

2361

time2 = datetime.datetime.now()

2451

2362

if (time2 - time) >= delay:

2452

2363

if not client.approved_by_default:

2453

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

2454

" waiting for approval",

2455

client.name)

2364

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

2365

" waiting for approval",

2366

client.name)

2456

2367

if self.server.use_dbus:

2457

2368

# Emit D-Bus signal

2458

2369

client.Rejected("Approval timed out")

2465

2376

try:

2466

2377

session.send(client.secret)

2467

2378

except gnutls.Error as error:

2468

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

2379

logger.warning("gnutls send failed",

2380

exc_info=error)

2469

2381

return

2470

2382

2471

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

2383

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

2472

2384

# bump the timeout using extended_timeout

2473

2385

client.bump_timeout(client.extended_timeout)

2474

2386

if self.server.use_dbus:

2481

2393

try:

2482

2394

session.bye()

2483

2395

except gnutls.Error as error:

2484

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

2396

logger.warning("GnuTLS bye failed",

2397

exc_info=error)

2485

2398

2486

2399

@staticmethod

2487

2400

def peer_certificate(session):

2488

2401

"Return the peer's certificate as a bytestring"

2489

2402

try:

2490

cert_type = gnutls.certificate_type_get2(

2491

session, gnutls.CTYPE_PEERS)

2403

cert_type = gnutls.certificate_type_get2(session._c_object,

2404

gnutls.CTYPE_PEERS)

2492

2405

except AttributeError:

2493

cert_type = gnutls.certificate_type_get(session)

2406

cert_type = gnutls.certificate_type_get(session._c_object)

2494

2407

if gnutls.has_rawpk:

2495

2408

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2496

2409

else:

2497

2410

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2498

2411

# If not a valid certificate type...

2499

2412

if cert_type not in valid_cert_types:

2500

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

2501

valid_cert_types)

2413

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

2414

valid_cert_types)

2502

2415

# ...return invalid data

2503

2416

return b""

2504

2417

list_size = ctypes.c_uint(1)

2505

2418

cert_list = (gnutls.certificate_get_peers

2506

(session, ctypes.byref(list_size)))

2419

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

2507

2420

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

2508

2421

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

2509

2422

if list_size.value == 0:

2531

2444

buf = ctypes.create_string_buffer(32)

2532

2445

buf_len = ctypes.c_size_t(len(buf))

2533

2446

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

2534

gnutls.pubkey_get_key_id(

2535

pubkey,

2536

gnutls.KEYID_USE_SHA256,

2537

ctypes.cast(ctypes.byref(buf),

2538

ctypes.POINTER(ctypes.c_ubyte)),

2539

ctypes.byref(buf_len))

2447

gnutls.pubkey_get_key_id(pubkey,

2448

gnutls.KEYID_USE_SHA256,

2449

ctypes.cast(ctypes.byref(buf),

2450

ctypes.POINTER(ctypes.c_ubyte)),

2451

ctypes.byref(buf_len))

2540

2452

# Deinit the certificate

2541

2453

gnutls.pubkey_deinit(pubkey)

2542

2454

2623

2535

2624

2536

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2625

2537

socketserver.TCPServer):

2626

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

2538

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

2627

2539

2628

2540

Attributes:

2629

2541

enabled: Boolean; whether this server is activated yet

2680

2592

if SO_BINDTODEVICE is None:

2681

2593

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

2682

2594

# common enough.

2683

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

2595

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

2684

2596

SO_BINDTODEVICE = 25

2685

2597

try:

2686

2598

self.socket.setsockopt(

2688

2600

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

2689

2601

except socket.error as error:

2690

2602

if error.errno == errno.EPERM:

2691

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

2692

self.interface)

2603

logger.error("No permission to bind to"

2604

" interface %s", self.interface)

2693

2605

elif error.errno == errno.ENOPROTOOPT:

2694

log.error("SO_BINDTODEVICE not available; cannot"

2695

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

2606

logger.error("SO_BINDTODEVICE not available;"

2607

" cannot bind to interface %s",

2608

self.interface)

2696

2609

elif error.errno == errno.ENODEV:

2697

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

2698

" bind", self.interface)

2610

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

2611

" cannot bind", self.interface)

2699

2612

else:

2700

2613

raise

2701

2614

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

2760

2673

def add_pipe(self, parent_pipe, proc):

2761

2674

# Call "handle_ipc" for both data and EOF events

2762

2675

GLib.io_add_watch(

2763

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

2764

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

2676

parent_pipe.fileno(),

2677

GLib.IO_IN | GLib.IO_HUP,

2765

2678

functools.partial(self.handle_ipc,

2766

2679

parent_pipe=parent_pipe,

2767

2680

proc=proc))

2780

2693

request = parent_pipe.recv()

2781

2694

command = request[0]

2782

2695

2783

if command == "init":

2696

if command == 'init':

2784

2697

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

2785

2698

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

2786

2699

address = request[3]

2787

2700

2788

2701

for c in self.clients.values():

2789

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2790

"27AE41E4649B934CA495991B7852B855"):

2702

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2791

2703

continue

2792

2704

if key_id and c.key_id == key_id:

2793

2705

client = c

2796

2708

client = c

2797

2709

break

2798

2710

else:

2799

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

2800

" %s", key_id or fpr, address)

2711

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

2712

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

2801

2713

if self.use_dbus:

2802

2714

# Emit D-Bus signal

2803

2715

mandos_dbus_service.ClientNotFound(key_id or fpr,

2806

2718

return False

2807

2719

2808

2720

GLib.io_add_watch(

2809

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

2810

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

2721

parent_pipe.fileno(),

2722

GLib.IO_IN | GLib.IO_HUP,

2811

2723

functools.partial(self.handle_ipc,

2812

2724

parent_pipe=parent_pipe,

2813

2725

proc=proc,

2816

2728

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

2817

2729

# same fileno

2818

2730

return False

2819

if command == "funcall":

2731

if command == 'funcall':

2820

2732

funcname = request[1]

2821

2733

args = request[2]

2822

2734

kwargs = request[3]

2823

2735

2824

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

2736

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

2825

2737

funcname)(*args,

2826

2738

**kwargs)))

2827

2739

2828

if command == "getattr":

2740

if command == 'getattr':

2829

2741

attrname = request[1]

2830

2742

if isinstance(client_object.__getattribute__(attrname),

2831

collections.abc.Callable):

2832

parent_pipe.send(("function", ))

2743

collections.Callable):

2744

parent_pipe.send(('function', ))

2833

2745

else:

2834

2746

parent_pipe.send((

2835

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

2747

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

2836

2748

2837

if command == "setattr":

2749

if command == 'setattr':

2838

2750

attrname = request[1]

2839

2751

value = request[2]

2840

2752

setattr(client_object, attrname, value)

2845

2757

def rfc3339_duration_to_delta(duration):

2846

2758

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

2847

2759

2848

>>> timedelta = datetime.timedelta

2849

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

2850

True

2851

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

2852

True

2853

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

2854

True

2855

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

2856

True

2857

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

2858

True

2859

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

2860

True

2861

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

2862

True

2863

>>> del timedelta

2760

>>> rfc3339_duration_to_delta("P7D")

2761

datetime.timedelta(7)

2762

>>> rfc3339_duration_to_delta("PT60S")

2763

datetime.timedelta(0, 60)

2764

>>> rfc3339_duration_to_delta("PT60M")

2765

datetime.timedelta(0, 3600)

2766

>>> rfc3339_duration_to_delta("PT24H")

2767

datetime.timedelta(1)

2768

>>> rfc3339_duration_to_delta("P1W")

2769

datetime.timedelta(7)

2770

>>> rfc3339_duration_to_delta("PT5M30S")

2771

datetime.timedelta(0, 330)

2772

>>> rfc3339_duration_to_delta("P1DT3M20S")

2773

datetime.timedelta(1, 200)

2864

2774

"""

2865

2775

2866

2776

# Parsing an RFC 3339 duration with regular expressions is not

2946

2856

def string_to_delta(interval):

2947

2857

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

2948

2858

2949

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

2950

True

2951

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

2952

True

2953

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

2954

True

2955

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

2956

True

2957

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

2958

True

2959

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

2960

True

2859

>>> string_to_delta('7d')

2860

datetime.timedelta(7)

2861

>>> string_to_delta('60s')

2862

datetime.timedelta(0, 60)

2863

>>> string_to_delta('60m')

2864

datetime.timedelta(0, 3600)

2865

>>> string_to_delta('24h')

2866

datetime.timedelta(1)

2867

>>> string_to_delta('1w')

2868

datetime.timedelta(7)

2869

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

2870

datetime.timedelta(0, 330)

2961

2871

"""

2962

2872

2963

2873

try:

3065

2975

3066

2976

options = parser.parse_args()

3067

2977

2978

if options.check:

2979

import doctest

2980

fail_count, test_count = doctest.testmod()

2981

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

2982

3068

2983

# Default values for config file for server-global settings

3069

2984

if gnutls.has_rawpk:

3070

2985

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

3109

3024

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

3110

3025

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

3111

3026

# happen with a supplied network socket.

3112

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

3027

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

3113

3028

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

3114

3029

["socket"])

3115

os.set_inheritable(server_settings["socket"], False)

3116

3030

del server_config

3117

3031

3118

3032

# Override the settings from the config file with command line

3167

3081

3168

3082

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

3169

3083

syslogger.setFormatter(

3170

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

3171

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

3084

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

3085

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

3172

3086

server_settings["servicename"])))

3173

3087

3174

3088

# Parse config file with clients

3198

3112

try:

3199

3113

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

3200

3114

except IOError as e:

3201

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

3202

exc_info=e)

3115

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

3116

exc_info=e)

3203

3117

3204

3118

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

3205

3119

("mandos", "mandos"),

3216

3130

try:

3217

3131

os.setgid(gid)

3218

3132

os.setuid(uid)

3219

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

3133

if debug:

3134

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

3135

gid))

3220

3136

except OSError as error:

3221

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

3222

os.strerror(error.errno))

3137

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

3138

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

3223

3139

if error.errno != errno.EPERM:

3224

3140

raise

3225

3141

3232

3148

3233

3149

@gnutls.log_func

3234

3150

def debug_gnutls(level, string):

3235

log.debug("GnuTLS: %s",

3236

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

3151

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

3237

3152

3238

3153

gnutls.global_set_log_function(debug_gnutls)

3239

3154

3257

3172

# From the Avahi example code

3258

3173

DBusGMainLoop(set_as_default=True)

3259

3174

main_loop = GLib.MainLoop()

3260

if use_dbus or zeroconf:

3261

bus = dbus.SystemBus()

3175

bus = dbus.SystemBus()

3262

3176

# End of Avahi example code

3263

3177

if use_dbus:

3264

3178

try:

3269

3183

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

3270

3184

do_not_queue=True)

3271

3185

except dbus.exceptions.DBusException as e:

3272

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

3186

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

3273

3187

use_dbus = False

3274

3188

server_settings["use_dbus"] = False

3275

3189

tcp_server.use_dbus = False

3334

3248

if isinstance(s, bytes)

3335

3249

else s) for s in

3336

3250

value["client_structure"]]

3337

# .name, .host, and .checker_command

3338

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

3251

# .name & .host

3252

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

3339

3253

if isinstance(value[k], bytes):

3340

3254

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

3341

3255

if "key_id" not in value:

3351

3265

for key, value in

3352

3266

bytes_old_client_settings.items()}

3353

3267

del bytes_old_client_settings

3354

# .host and .checker_command

3268

# .host

3355

3269

for value in old_client_settings.values():

3356

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

3357

if isinstance(value[attribute], bytes):

3358

value[attribute] = (value[attribute]

3359

.decode("utf-8"))

3270

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

3271

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

3272

.decode("utf-8"))

3360

3273

os.remove(stored_state_path)

3361

3274

except IOError as e:

3362

3275

if e.errno == errno.ENOENT:

3363

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

3364

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

3276

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

3277

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

3365

3278

else:

3366

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

3367

exc_info=e)

3279

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

3280

exc_info=e)

3368

3281

raise

3369

3282

except EOFError as e:

3370

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

3371

exc_info=e)

3283

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

3284

"EOFError:",

3285

exc_info=e)

3372

3286

3373

3287

with PGPEngine() as pgp:

3374

3288

for client_name, client in clients_data.items():

3401

3315

if client["enabled"]:

3402

3316

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

3403

3317

if not client["last_checked_ok"]:

3404

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

3405

" never performed a successful"

3406

" checker", client_name)

3318

logger.warning(

3319

"disabling client {} - Client never "

3320

"performed a successful checker".format(

3321

client_name))

3407

3322

client["enabled"] = False

3408

3323

elif client["last_checker_status"] != 0:

3409

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

3410

" last checker failed with error"

3411

" code %s", client_name,

3412

client["last_checker_status"])

3324

logger.warning(

3325

"disabling client {} - Client last"

3326

" checker failed with error code"

3327

" {}".format(

3328

client_name,

3329

client["last_checker_status"]))

3413

3330

client["enabled"] = False

3414

3331

else:

3415

3332

client["expires"] = (

3416

3333

datetime.datetime.utcnow()

3417

3334

+ client["timeout"])

3418

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

3419

" enabled", client_name)

3335

logger.debug("Last checker succeeded,"

3336

" keeping {} enabled".format(

3337

client_name))

3420

3338

try:

3421

3339

client["secret"] = pgp.decrypt(

3422

3340

client["encrypted_secret"],

3423

3341

client_settings[client_name]["secret"])

3424

3342

except PGPError:

3425

3343

# If decryption fails, we use secret from new settings

3426

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

3427

client_name)

3344

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

3345

client_name))

3428

3346

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

3429

3347

["secret"])

3430

3348

3444

3362

server_settings=server_settings)

3445

3363

3446

3364

if not tcp_server.clients:

3447

log.warning("No clients defined")

3365

logger.warning("No clients defined")

3448

3366

3449

3367

if not foreground:

3450

3368

if pidfile is not None:

3453

3371

with pidfile:

3454

3372

print(pid, file=pidfile)

3455

3373

except IOError:

3456

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

3457

pidfilename, pid)

3374

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

3375

pidfilename, pid)

3458

3376

del pidfile

3459

3377

del pidfilename

3460

3378

3610

3528

3611

3529

try:

3612

3530

with tempfile.NamedTemporaryFile(

3613

mode="wb",

3531

mode='wb',

3614

3532

suffix=".pickle",

3615

prefix="clients-",

3533

prefix='clients-',

3616

3534

dir=os.path.dirname(stored_state_path),

3617

3535

delete=False) as stored_state:

3618

3536

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

3626

3544

except NameError:

3627

3545

pass

3628

3546

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

3629

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

3630

os.strerror(e.errno))

3547

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

3548

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

3631

3549

else:

3632

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

3633

exc_info=e)

3550

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

3551

exc_info=e)

3634

3552

raise

3635

3553

3636

3554

# Delete all clients, and settings from config

3653

3571

mandos_dbus_service.client_added_signal(client)

3654

3572

# Need to initiate checking of clients

3655

3573

if client.enabled:

3656

client.init_checker(randomize_start=True)

3574

client.init_checker()

3657

3575

3658

3576

tcp_server.enable()

3659

3577

tcp_server.server_activate()

3662

3580

if zeroconf:

3663

3581

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

3664

3582

if use_ipv6:

3665

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

3666

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

3583

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

3584

" flowinfo %d, scope_id %d",

3585

*tcp_server.socket.getsockname())

3667

3586

else: # IPv4

3668

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

3669

*tcp_server.socket.getsockname())

3587

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

3588

*tcp_server.socket.getsockname())

3670

3589

3671

3590

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

3672

3591

3676

3595

try:

3677

3596

service.activate()

3678

3597

except dbus.exceptions.DBusException as error:

3679

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

3598

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

3680

3599

cleanup()

3681

3600

sys.exit(1)

3682

3601

# End of Avahi example code

3683

3602

3684

GLib.io_add_watch(

3685

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

3686

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3687

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

3688

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

3603

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

3604

lambda *args, **kwargs:

3605

(tcp_server.handle_request

3606

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

3689

3607

3690

log.debug("Starting main loop")

3608

logger.debug("Starting main loop")

3691

3609

main_loop.run()

3692

3610

except AvahiError as error:

3693

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

3611

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

3694

3612

cleanup()

3695

3613

sys.exit(1)

3696

3614

except KeyboardInterrupt:

3697

3615

if debug:

3698

3616

print("", file=sys.stderr)

3699

log.debug("Server received KeyboardInterrupt")

3700

log.debug("Server exiting")

3617

logger.debug("Server received KeyboardInterrupt")

3618

logger.debug("Server exiting")

3701

3619

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

3702

3620

cleanup()

3703

3621

3704

3705

def parse_test_args():

3706

# type: () -> argparse.Namespace

3707

parser = argparse.ArgumentParser(add_help=False)

3708

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

3709

parser.add_argument("--prefix", )

3710

args, unknown_args = parser.parse_known_args()

3711

if args.check:

3712

# Remove test options from sys.argv

3713

sys.argv[1:] = unknown_args

3714

return args

3715

3716

# Add all tests from doctest strings

3717

def load_tests(loader, tests, none):

3718

import doctest

3719

tests.addTests(doctest.DocTestSuite())

3720

return tests

3721

3722

if __name__ == "__main__":

3723

options = parse_test_args()

3724

try:

3725

if options.check:

3726

extra_test_prefix = options.prefix

3727

if extra_test_prefix is not None:

3728

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

3729

.result.wasSuccessful()):

3730

sys.exit(1)

3731

class ExtraTestLoader(unittest.TestLoader):

3732

testMethodPrefix = extra_test_prefix

3733

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

3734

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

3735

else:

3736

unittest.main(argv=[""])

3737

else:

3738

main()

3739

finally:

3740

logging.shutdown()

3741

3742

# Local Variables:

3743

# run-tests:

3744

# (lambda (&optional extra)

3745

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

3746

# extra))

3747

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

3748

# (funcall remove-test-window)

3749

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

3750

# run-tests-in-test-buffer:

3751

# (lambda (dir &optional extra)

3752

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

3753

# (setq buffer-read-only nil

3754

# default-directory dir)

3755

# (erase-buffer)

3756

# (compilation-mode))

3757

# (let ((process-result

3758

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

3759

# (process-file-shell-command

3760

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

3761

# (and (numberp process-result)

3762

# (= process-result 0))))

3763

# get-command-line:

3764

# (lambda (&optional extra)

3765

# (let ((quoted-script

3766

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

3767

# (format

3768

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

3769

# quoted-script)))

3770

# get-script-name:

3771

# (lambda ()

3772

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

3773

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

3774

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

3775

# (buffer-file-name))))

3776

# remove-test-window:

3777

# (lambda ()

3778

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

3779

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

3780

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

3781

# (lambda ()

3782

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

3783

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

3784

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

3785

# (display-buffer-overriding-action

3786

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

3787

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

3788

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

3789

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

3790

# eval:

3791

# (progn

3792

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

3793

# (funcall run-tests t)))

3794

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

3795

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

3796

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

3797

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

3798

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

3799

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

3800

# End:

3622

3623

if __name__ == '__main__':

3624

main()