/mandos/release : revision 237.7.418

11

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

12

#

13

# Everything else is

14

15

14

15

16

#

17

# This program is free software: you can redistribute it and/or modify

18

# it under the terms of the GNU General Public License as published by

34

from __future__ import (division, absolute_import, print_function,

35

unicode_literals)

36

37

from future_builtins import *

37

try:

38

from future_builtins import *

39

except ImportError:

40

pass

38

41

39

import SocketServer as socketserver

42

try:

43

import SocketServer as socketserver

44

except ImportError:

45

import socketserver

40

46

import socket

41

47

import argparse

42

48

import datetime

43

49

import errno

44

import gnutls.crypto

45

import gnutls.connection

46

import gnutls.errors

47

import gnutls.library.functions

48

import gnutls.library.constants

49

import gnutls.library.types

50

import ConfigParser as configparser

50

try:

51

import ConfigParser as configparser

52

except ImportError:

53

import configparser

51

54

import sys

52

55

import re

53

56

import os

62

65

import struct

63

66

import fcntl

64

67

import functools

65

import cPickle as pickle

68

try:

69

import cPickle as pickle

70

except ImportError:

71

import pickle

66

72

import multiprocessing

67

73

import types

68

74

import binascii

69

75

import tempfile

70

76

import itertools

77

import collections

78

import codecs

71

79

72

80

import dbus

73

81

import dbus.service

74

import gobject

75

import avahi

82

from gi.repository import GLib

76

83

from dbus.mainloop.glib import DBusGMainLoop

77

84

import ctypes

78

85

import ctypes.util

79

86

import xml.dom.minidom

80

87

import inspect

81

import GnuPGInterface

82

88

89

# Try to find the value of SO_BINDTODEVICE:

83

90

try:

91

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

92

# newer, and it is also the most natural place for it:

84

93

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

85

94

except AttributeError:

86

95

try:

96

# This is where SO_BINDTODEVICE was up to and including Python

97

# 2.6, and also 3.2:

87

98

from IN import SO_BINDTODEVICE

88

99

except ImportError:

89

SO_BINDTODEVICE = None

90

91

version = "1.5.5"

100

# In Python 2.7 it seems to have been removed entirely.

101

# Try running the C preprocessor:

102

try:

103

cc = subprocess.Popen(["cc", "--language=c", "-E",

104

"/dev/stdin"],

105

stdin=subprocess.PIPE,

106

stdout=subprocess.PIPE)

107

stdout = cc.communicate(

108

"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]

109

SO_BINDTODEVICE = int(stdout.splitlines()[-1])

110

except (OSError, ValueError, IndexError):

111

# No value found

112

SO_BINDTODEVICE = None

113

114

if sys.version_info.major == 2:

115

str = unicode

116

117

version = "1.7.10"

92

118

stored_state_file = "clients.pickle"

93

119

94

120

logger = logging.getLogger()

95

syslogger = (logging.handlers.SysLogHandler

96

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

97

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

121

syslogger = None

98

122

99

123

try:

100

if_nametoindex = (ctypes.cdll.LoadLibrary

101

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

102

.if_nametoindex)

124

if_nametoindex = ctypes.cdll.LoadLibrary(

125

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

103

126

except (OSError, AttributeError):

127

104

128

def if_nametoindex(interface):

105

129

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

106

130

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

107

131

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

108

132

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

109

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

110

interface))

111

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

112

ifreq[16:20])[0]

133

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

134

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

113

135

return interface_index

114

136

115

137

138

def copy_function(func):

139

"""Make a copy of a function"""

140

if sys.version_info.major == 2:

141

return types.FunctionType(func.func_code,

142

func.func_globals,

143

func.func_name,

144

func.func_defaults,

145

func.func_closure)

146

else:

147

return types.FunctionType(func.__code__,

148

func.__globals__,

149

func.__name__,

150

func.__defaults__,

151

func.__closure__)

152

153

116

154

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

117

155

"""init logger and add loglevel"""

118

156

157

global syslogger

158

syslogger = (logging.handlers.SysLogHandler(

159

facility = logging.handlers.SysLogHandler.LOG_DAEMON,

160

address = "/dev/log"))

119

161

syslogger.setFormatter(logging.Formatter

120

162

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

121

163

' %(message)s'))

138

180

139

181

class PGPEngine(object):

140

182

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

183

141

184

def __init__(self):

142

self.gnupg = GnuPGInterface.GnuPG()

143

185

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

144

self.gnupg = GnuPGInterface.GnuPG()

145

self.gnupg.options.meta_interactive = False

146

self.gnupg.options.homedir = self.tempdir

147

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

148

'--quiet',

149

'--no-use-agent'])

186

self.gpg = "gpg"

187

try:

188

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

189

for line in output.splitlines():

190

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

191

if name == "gpg":

192

self.gpg = path

193

break

194

except OSError as e:

195

if e.errno != errno.ENOENT:

196

raise

197

self.gnupgargs = ['--batch',

198

'--homedir', self.tempdir,

199

'--force-mdc',

200

'--quiet']

201

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

202

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

203

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

150

204

151

205

def __enter__(self):

152

206

return self

174

228

def password_encode(self, password):

175

229

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

176

230

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

177

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

231

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

232

if len(encoded) > 2048:

233

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

234

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

235

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

236

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

237

return encoded

178

238

179

239

def encrypt(self, data, password):

180

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

181

with open(os.devnull, "w") as devnull:

182

try:

183

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

184

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

185

attach_fhs={'stderr': devnull})

186

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

187

f.write(data)

188

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

189

ciphertext = f.read()

190

proc.wait()

191

except IOError as e:

192

raise PGPError(e)

193

self.gnupg.passphrase = None

240

passphrase = self.password_encode(password)

241

with tempfile.NamedTemporaryFile(

242

dir=self.tempdir) as passfile:

243

passfile.write(passphrase)

244

passfile.flush()

245

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

246

'--passphrase-file',

247

passfile.name]

248

+ self.gnupgargs,

249

stdin = subprocess.PIPE,

250

stdout = subprocess.PIPE,

251

stderr = subprocess.PIPE)

252

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

253

if proc.returncode != 0:

254

raise PGPError(err)

194

255

return ciphertext

195

256

196

257

def decrypt(self, data, password):

197

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

198

with open(os.devnull, "w") as devnull:

199

try:

200

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

201

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

202

attach_fhs={'stderr': devnull})

203

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

204

f.write(data)

205

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

206

decrypted_plaintext = f.read()

207

proc.wait()

208

except IOError as e:

209

raise PGPError(e)

210

self.gnupg.passphrase = None

258

passphrase = self.password_encode(password)

259

with tempfile.NamedTemporaryFile(

260

dir = self.tempdir) as passfile:

261

passfile.write(passphrase)

262

passfile.flush()

263

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

264

'--passphrase-file',

265

passfile.name]

266

+ self.gnupgargs,

267

stdin = subprocess.PIPE,

268

stdout = subprocess.PIPE,

269

stderr = subprocess.PIPE)

270

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

271

if proc.returncode != 0:

272

raise PGPError(err)

211

273

return decrypted_plaintext

212

274

275

# Pretend that we have an Avahi module

276

class Avahi(object):

277

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

278

It is instantiated once, and simulates having an Avahi module."""

279

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

280

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

281

PROTO_INET = 0 # avahi-common/address.h

282

PROTO_INET6 = 1 # avahi-common/address.h

283

DBUS_NAME = "org.freedesktop.Avahi"

284

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

285

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

286

DBUS_PATH_SERVER = "/"

287

def string_array_to_txt_array(self, t):

288

return dbus.Array((dbus.ByteArray(s.encode("utf-8"))

289

for s in t), signature="ay")

290

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

291

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

292

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

293

SERVER_INVALID = 0 # avahi-common/defs.h

294

SERVER_REGISTERING = 1 # avahi-common/defs.h

295

SERVER_RUNNING = 2 # avahi-common/defs.h

296

SERVER_COLLISION = 3 # avahi-common/defs.h

297

SERVER_FAILURE = 4 # avahi-common/defs.h

298

avahi = Avahi()

213

299

214

300

class AvahiError(Exception):

215

301

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

216

302

self.value = value

217

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

218

def __unicode__(self):

219

return unicode(repr(self.value))

303

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

304

**kwargs)

305

220

306

221

307

class AvahiServiceError(AvahiError):

222

308

pass

223

309

310

224

311

class AvahiGroupError(AvahiError):

225

312

pass

226

313

233

320

Used to optionally bind to the specified interface.

234

321

name: string; Example: 'Mandos'

235

322

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

236

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

323

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

237

324

port: integer; what port to announce

238

325

TXT: list of strings; TXT record for the service

239

326

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

246

333

bus: dbus.SystemBus()

247

334

"""

248

335

249

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

250

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

251

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

252

protocol = avahi.PROTO_UNSPEC, bus = None):

336

def __init__(self,

337

interface = avahi.IF_UNSPEC,

338

name = None,

339

servicetype = None,

340

port = None,

341

TXT = None,

342

domain = "",

343

host = "",

344

max_renames = 32768,

345

protocol = avahi.PROTO_UNSPEC,

346

bus = None):

253

347

self.interface = interface

254

348

self.name = name

255

349

self.type = servicetype

265

359

self.bus = bus

266

360

self.entry_group_state_changed_match = None

267

361

268

def rename(self):

362

def rename(self, remove=True):

269

363

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

270

364

if self.rename_count >= self.max_renames:

271

365

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

272

366

" after %i retries, exiting.",

273

367

self.rename_count)

274

368

raise AvahiServiceError("Too many renames")

275

self.name = unicode(self.server

276

.GetAlternativeServiceName(self.name))

369

self.name = str(

370

self.server.GetAlternativeServiceName(self.name))

371

self.rename_count += 1

277

372

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

278

373

self.name)

279

self.remove()

374

if remove:

375

self.remove()

280

376

try:

281

377

self.add()

282

378

except dbus.exceptions.DBusException as error:

283

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

284

self.cleanup()

285

os._exit(1)

286

self.rename_count += 1

379

if (error.get_dbus_name()

380

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

381

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

382

return self.rename(remove=False)

383

else:

384

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

385

self.cleanup()

386

os._exit(1)

287

387

288

388

def remove(self):

289

389

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

327

427

self.rename()

328

428

elif state == avahi.ENTRY_GROUP_FAILURE:

329

429

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

330

unicode(error))

331

raise AvahiGroupError("State changed: {0!s}"

332

.format(error))

430

str(error))

431

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

333

432

334

433

def cleanup(self):

335

434

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

345

444

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

346

445

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

347

446

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

348

bad_states = { avahi.SERVER_INVALID:

349

"Zeroconf server invalid",

350

avahi.SERVER_REGISTERING: None,

351

avahi.SERVER_COLLISION:

352

"Zeroconf server name collision",

353

avahi.SERVER_FAILURE:

354

"Zeroconf server failure" }

447

bad_states = {

448

avahi.SERVER_INVALID: "Zeroconf server invalid",

449

avahi.SERVER_REGISTERING: None,

450

avahi.SERVER_COLLISION: "Zeroconf server name collision",

451

avahi.SERVER_FAILURE: "Zeroconf server failure",

452

}

355

453

if state in bad_states:

356

454

if bad_states[state] is not None:

357

455

if error is None:

360

458

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

361

459

self.cleanup()

362

460

elif state == avahi.SERVER_RUNNING:

363

self.add()

461

try:

462

self.add()

463

except dbus.exceptions.DBusException as error:

464

if (error.get_dbus_name()

465

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

466

logger.info("Local Zeroconf service name"

467

" collision.")

468

return self.rename(remove=False)

469

else:

470

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

471

self.cleanup()

472

os._exit(1)

364

473

else:

365

474

if error is None:

366

475

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

376

485

follow_name_owner_changes=True),

377

486

avahi.DBUS_INTERFACE_SERVER)

378

487

self.server.connect_to_signal("StateChanged",

379

self.server_state_changed)

488

self.server_state_changed)

380

489

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

381

490

382

491

383

492

class AvahiServiceToSyslog(AvahiService):

384

def rename(self):

493

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

385

494

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

386

ret = AvahiService.rename(self)

387

syslogger.setFormatter(logging.Formatter

388

('Mandos ({0}) [%(process)d]:'

389

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

390

.format(self.name)))

495

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

496

syslogger.setFormatter(logging.Formatter(

497

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

498

.format(self.name)))

391

499

return ret

392

500

393

394

def timedelta_to_milliseconds(td):

395

"Convert a datetime.timedelta() to milliseconds"

396

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

397

+ (td.seconds * 1000)

398

+ (td.microseconds // 1000))

399

501

# Pretend that we have a GnuTLS module

502

class GnuTLS(object):

503

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

504

It is instantiated once, and simulates having a GnuTLS module."""

505

506

_library = ctypes.cdll.LoadLibrary(

507

ctypes.util.find_library("gnutls"))

508

_need_version = b"3.3.0"

509

def __init__(self):

510

# Need to use class name "GnuTLS" here, since this method is

511

# called before the assignment to the "gnutls" global variable

512

# happens.

513

if GnuTLS.check_version(self._need_version) is None:

514

raise GnuTLS.Error("Needs GnuTLS {} or later"

515

.format(self._need_version))

516

517

# Unless otherwise indicated, the constants and types below are

518

# all from the gnutls/gnutls.h C header file.

519

520

# Constants

521

E_SUCCESS = 0

522

E_INTERRUPTED = -52

523

E_AGAIN = -28

524

CRT_OPENPGP = 2

525

CLIENT = 2

526

SHUT_RDWR = 0

527

CRD_CERTIFICATE = 1

528

E_NO_CERTIFICATE_FOUND = -49

529

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

530

531

# Types

532

class session_int(ctypes.Structure):

533

_fields_ = []

534

session_t = ctypes.POINTER(session_int)

535

class certificate_credentials_st(ctypes.Structure):

536

_fields_ = []

537

certificate_credentials_t = ctypes.POINTER(

538

certificate_credentials_st)

539

certificate_type_t = ctypes.c_int

540

class datum_t(ctypes.Structure):

541

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

542

('size', ctypes.c_uint)]

543

class openpgp_crt_int(ctypes.Structure):

544

_fields_ = []

545

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

546

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

547

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

548

credentials_type_t = ctypes.c_int

549

transport_ptr_t = ctypes.c_void_p

550

close_request_t = ctypes.c_int

551

552

# Exceptions

553

class Error(Exception):

554

# We need to use the class name "GnuTLS" here, since this

555

# exception might be raised from within GnuTLS.__init__,

556

# which is called before the assignment to the "gnutls"

557

# global variable has happened.

558

def __init__(self, message = None, code = None, args=()):

559

# Default usage is by a message string, but if a return

560

# code is passed, convert it to a string with

561

# gnutls.strerror()

562

self.code = code

563

if message is None and code is not None:

564

message = GnuTLS.strerror(code)

565

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

566

message, *args)

567

568

class CertificateSecurityError(Error):

569

pass

570

571

# Classes

572

class Credentials(object):

573

def __init__(self):

574

self._c_object = gnutls.certificate_credentials_t()

575

gnutls.certificate_allocate_credentials(

576

ctypes.byref(self._c_object))

577

self.type = gnutls.CRD_CERTIFICATE

578

579

def __del__(self):

580

gnutls.certificate_free_credentials(self._c_object)

581

582

class ClientSession(object):

583

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

584

self._c_object = gnutls.session_t()

585

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

586

gnutls.set_default_priority(self._c_object)

587

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

588

gnutls.handshake_set_private_extensions(self._c_object,

589

True)

590

self.socket = socket

591

if credentials is None:

592

credentials = gnutls.Credentials()

593

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

594

ctypes.cast(credentials._c_object,

595

ctypes.c_void_p))

596

self.credentials = credentials

597

598

def __del__(self):

599

gnutls.deinit(self._c_object)

600

601

def handshake(self):

602

return gnutls.handshake(self._c_object)

603

604

def send(self, data):

605

data = bytes(data)

606

data_len = len(data)

607

while data_len > 0:

608

data_len -= gnutls.record_send(self._c_object,

609

data[-data_len:],

610

data_len)

611

612

def bye(self):

613

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

614

615

# Error handling functions

616

def _error_code(result):

617

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

618

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

619

if result >= 0:

620

return result

621

if result == gnutls.E_NO_CERTIFICATE_FOUND:

622

raise gnutls.CertificateSecurityError(code = result)

623

raise gnutls.Error(code = result)

624

625

def _retry_on_error(result, func, arguments):

626

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

627

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

628

while result < 0:

629

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

630

return _error_code(result)

631

result = func(*arguments)

632

return result

633

634

# Unless otherwise indicated, the function declarations below are

635

# all from the gnutls/gnutls.h C header file.

636

637

# Functions

638

priority_set_direct = _library.gnutls_priority_set_direct

639

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

640

ctypes.POINTER(ctypes.c_char_p)]

641

priority_set_direct.restype = _error_code

642

643

init = _library.gnutls_init

644

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

645

init.restype = _error_code

646

647

set_default_priority = _library.gnutls_set_default_priority

648

set_default_priority.argtypes = [session_t]

649

set_default_priority.restype = _error_code

650

651

record_send = _library.gnutls_record_send

652

record_send.argtypes = [session_t, ctypes.c_void_p,

653

ctypes.c_size_t]

654

record_send.restype = ctypes.c_ssize_t

655

record_send.errcheck = _retry_on_error

656

657

certificate_allocate_credentials = (

658

_library.gnutls_certificate_allocate_credentials)

659

certificate_allocate_credentials.argtypes = [

660

ctypes.POINTER(certificate_credentials_t)]

661

certificate_allocate_credentials.restype = _error_code

662

663

certificate_free_credentials = (

664

_library.gnutls_certificate_free_credentials)

665

certificate_free_credentials.argtypes = [certificate_credentials_t]

666

certificate_free_credentials.restype = None

667

668

handshake_set_private_extensions = (

669

_library.gnutls_handshake_set_private_extensions)

670

handshake_set_private_extensions.argtypes = [session_t,

671

ctypes.c_int]

672

handshake_set_private_extensions.restype = None

673

674

credentials_set = _library.gnutls_credentials_set

675

credentials_set.argtypes = [session_t, credentials_type_t,

676

ctypes.c_void_p]

677

credentials_set.restype = _error_code

678

679

strerror = _library.gnutls_strerror

680

strerror.argtypes = [ctypes.c_int]

681

strerror.restype = ctypes.c_char_p

682

683

certificate_type_get = _library.gnutls_certificate_type_get

684

certificate_type_get.argtypes = [session_t]

685

certificate_type_get.restype = _error_code

686

687

certificate_get_peers = _library.gnutls_certificate_get_peers

688

certificate_get_peers.argtypes = [session_t,

689

ctypes.POINTER(ctypes.c_uint)]

690

certificate_get_peers.restype = ctypes.POINTER(datum_t)

691

692

global_set_log_level = _library.gnutls_global_set_log_level

693

global_set_log_level.argtypes = [ctypes.c_int]

694

global_set_log_level.restype = None

695

696

global_set_log_function = _library.gnutls_global_set_log_function

697

global_set_log_function.argtypes = [log_func]

698

global_set_log_function.restype = None

699

700

deinit = _library.gnutls_deinit

701

deinit.argtypes = [session_t]

702

deinit.restype = None

703

704

handshake = _library.gnutls_handshake

705

handshake.argtypes = [session_t]

706

handshake.restype = _error_code

707

handshake.errcheck = _retry_on_error

708

709

transport_set_ptr = _library.gnutls_transport_set_ptr

710

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

711

transport_set_ptr.restype = None

712

713

bye = _library.gnutls_bye

714

bye.argtypes = [session_t, close_request_t]

715

bye.restype = _error_code

716

bye.errcheck = _retry_on_error

717

718

check_version = _library.gnutls_check_version

719

check_version.argtypes = [ctypes.c_char_p]

720

check_version.restype = ctypes.c_char_p

721

722

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

723

724

openpgp_crt_init = _library.gnutls_openpgp_crt_init

725

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

726

openpgp_crt_init.restype = _error_code

727

728

openpgp_crt_import = _library.gnutls_openpgp_crt_import

729

openpgp_crt_import.argtypes = [openpgp_crt_t,

730

ctypes.POINTER(datum_t),

731

openpgp_crt_fmt_t]

732

openpgp_crt_import.restype = _error_code

733

734

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

735

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

736

ctypes.POINTER(ctypes.c_uint)]

737

openpgp_crt_verify_self.restype = _error_code

738

739

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

740

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

741

openpgp_crt_deinit.restype = None

742

743

openpgp_crt_get_fingerprint = (

744

_library.gnutls_openpgp_crt_get_fingerprint)

745

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

746

ctypes.c_void_p,

747

ctypes.POINTER(

748

ctypes.c_size_t)]

749

openpgp_crt_get_fingerprint.restype = _error_code

750

751

# Remove non-public functions

752

del _error_code, _retry_on_error

753

# Create the global "gnutls" object, simulating a module

754

gnutls = GnuTLS()

755

756

def call_pipe(connection, # : multiprocessing.Connection

757

func, *args, **kwargs):

758

"""This function is meant to be called by multiprocessing.Process

759

760

This function runs func(*args, **kwargs), and writes the resulting

761

return value on the provided multiprocessing.Connection.

762

"""

763

connection.send(func(*args, **kwargs))

764

connection.close()

400

765

401

766

class Client(object):

402

767

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

408

773

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

409

774

to see if the client lives.

410

775

'None' if no process is running.

411

checker_callback_tag: a gobject event source tag, or None

776

checker_callback_tag: a GLib event source tag, or None

412

777

checker_command: string; External command which is run to check

413

778

if client lives. %() expansions are done at

414

779

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

415

780

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

416

checker_initiator_tag: a gobject event source tag, or None

781

checker_initiator_tag: a GLib event source tag, or None

417

782

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

418

783

client_structure: Object describing what attributes a client has

419

784

and is used for storing the client at exit

420

785

current_checker_command: string; current running checker_command

421

disable_initiator_tag: a gobject event source tag, or None

786

disable_initiator_tag: a GLib event source tag, or None

422

787

enabled: bool()

423

788

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

424

789

uniquely identify the client

429

794

last_checker_status: integer between 0 and 255 reflecting exit

430

795

status of last checker. -1 reflects crashed

431

796

checker, -2 means no checker completed yet.

797

last_checker_signal: The signal which killed the last checker, if

798

last_checker_status is -1

432

799

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

433

800

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

434

801

D-Bus identifiers

439

806

runtime_expansions: Allowed attributes for runtime expansion.

440

807

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

441

808

disabled, or None

809

server_settings: The server_settings dict from main()

442

810

"""

443

811

444

812

runtime_expansions = ("approval_delay", "approval_duration",

446

814

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

447

815

"last_approval_request", "last_checked_ok",

448

816

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

449

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

450

"extended_timeout": "15m",

451

"interval": "2m",

452

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

453

"host": "",

454

"approval_delay": "0s",

455

"approval_duration": "1s",

456

"approved_by_default": "True",

457

"enabled": "True",

458

}

459

460

def timeout_milliseconds(self):

461

"Return the 'timeout' attribute in milliseconds"

462

return timedelta_to_milliseconds(self.timeout)

463

464

def extended_timeout_milliseconds(self):

465

"Return the 'extended_timeout' attribute in milliseconds"

466

return timedelta_to_milliseconds(self.extended_timeout)

467

468

def interval_milliseconds(self):

469

"Return the 'interval' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.interval)

471

472

def approval_delay_milliseconds(self):

473

return timedelta_to_milliseconds(self.approval_delay)

817

client_defaults = {

818

"timeout": "PT5M",

819

"extended_timeout": "PT15M",

820

"interval": "PT2M",

821

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

822

"host": "",

823

"approval_delay": "PT0S",

824

"approval_duration": "PT1S",

825

"approved_by_default": "True",

826

"enabled": "True",

827

}

474

828

475

829

@staticmethod

476

830

def config_parser(config):

492

846

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

493

847

"enabled")

494

848

849

# Uppercase and remove spaces from fingerprint for later

850

# comparison purposes with return value from the

851

# fingerprint() function

495

852

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

496

853

.replace(" ", ""))

497

854

if "secret" in section:

498

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

855

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

856

.encode("utf-8"),

857

"base64")

499

858

elif "secfile" in section:

500

859

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

501

860

(section["secfile"])),

502

861

"rb") as secfile:

503

862

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

504

863

else:

505

raise TypeError("No secret or secfile for section {0}"

864

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

506

865

.format(section))

507

866

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

508

867

client["extended_timeout"] = string_to_delta(

519

878

520

879

return settings

521

880

522

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

881

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

523

882

self.name = name

883

if server_settings is None:

884

server_settings = {}

885

self.server_settings = server_settings

524

886

# adding all client settings

525

for setting, value in settings.iteritems():

887

for setting, value in settings.items():

526

888

setattr(self, setting, value)

527

889

528

890

if self.enabled:

536

898

self.expires = None

537

899

538

900

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

539

# Uppercase and remove spaces from fingerprint for later

540

# comparison purposes with return value from the fingerprint()

541

# function

542

901

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

543

902

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

544

903

datetime.datetime.utcnow())

551

910

self.current_checker_command = None

552

911

self.approved = None

553

912

self.approvals_pending = 0

554

self.changedstate = (multiprocessing_manager

555

.Condition(multiprocessing_manager

556

.Lock()))

557

self.client_structure = [attr for attr in

558

self.__dict__.iterkeys()

913

self.changedstate = multiprocessing_manager.Condition(

914

multiprocessing_manager.Lock())

915

self.client_structure = [attr

916

for attr in self.__dict__.keys()

559

917

if not attr.startswith("_")]

560

918

self.client_structure.append("client_structure")

561

919

562

for name, t in inspect.getmembers(type(self),

563

lambda obj:

564

isinstance(obj,

565

property)):

920

for name, t in inspect.getmembers(

921

type(self), lambda obj: isinstance(obj, property)):

566

922

if not name.startswith("_"):

567

923

self.client_structure.append(name)

568

924

589

945

if not quiet:

590

946

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

591

947

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

592

gobject.source_remove(self.disable_initiator_tag)

948

GLib.source_remove(self.disable_initiator_tag)

593

949

self.disable_initiator_tag = None

594

950

self.expires = None

595

951

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

596

gobject.source_remove(self.checker_initiator_tag)

952

GLib.source_remove(self.checker_initiator_tag)

597

953

self.checker_initiator_tag = None

598

954

self.stop_checker()

599

955

self.enabled = False

600

956

if not quiet:

601

957

self.send_changedstate()

602

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

958

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

603

959

return False

604

960

605

961

def __del__(self):

609

965

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

610

966

# and every interval from then on.

611

967

if self.checker_initiator_tag is not None:

612

gobject.source_remove(self.checker_initiator_tag)

613

self.checker_initiator_tag = (gobject.timeout_add

614

(self.interval_milliseconds(),

615

self.start_checker))

968

GLib.source_remove(self.checker_initiator_tag)

969

self.checker_initiator_tag = GLib.timeout_add(

970

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

971

self.start_checker)

616

972

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

617

973

if self.disable_initiator_tag is not None:

618

gobject.source_remove(self.disable_initiator_tag)

619

self.disable_initiator_tag = (gobject.timeout_add

620

(self.timeout_milliseconds(),

621

self.disable))

974

GLib.source_remove(self.disable_initiator_tag)

975

self.disable_initiator_tag = GLib.timeout_add(

976

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

622

977

# Also start a new checker *right now*.

623

978

self.start_checker()

624

979

625

def checker_callback(self, pid, condition, command):

980

def checker_callback(self, source, condition, connection,

981

command):

626

982

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

627

983

self.checker_callback_tag = None

628

984

self.checker = None

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

985

# Read return code from connection (see call_pipe)

986

returncode = connection.recv()

987

connection.close()

988

989

if returncode >= 0:

990

self.last_checker_status = returncode

991

self.last_checker_signal = None

631

992

if self.last_checker_status == 0:

632

993

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

633

994

vars(self))

634

995

self.checked_ok()

635

996

else:

636

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

637

vars(self))

997

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

638

998

else:

639

999

self.last_checker_status = -1

1000

self.last_checker_signal = -returncode

640

1001

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

641

1002

vars(self))

1003

return False

642

1004

643

1005

def checked_ok(self):

644

1006

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

645

1007

self.last_checked_ok = datetime.datetime.utcnow()

646

1008

self.last_checker_status = 0

1009

self.last_checker_signal = None

647

1010

self.bump_timeout()

648

1011

649

1012

def bump_timeout(self, timeout=None):

651

1014

if timeout is None:

652

1015

timeout = self.timeout

653

1016

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

1017

GLib.source_remove(self.disable_initiator_tag)

655

1018

self.disable_initiator_tag = None

656

1019

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(timedelta_to_milliseconds

659

(timeout), self.disable))

1020

self.disable_initiator_tag = GLib.timeout_add(

1021

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

660

1022

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

661

1023

662

1024

def need_approval(self):

676

1038

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

677

1039

# should be.

678

1040

679

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

680

try:

681

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

682

except (AttributeError, OSError) as error:

683

if (isinstance(error, OSError)

684

and error.errno != errno.ECHILD):

685

raise error

686

else:

687

if pid:

688

logger.warning("Checker was a zombie")

689

gobject.source_remove(self.checker_callback_tag)

690

self.checker_callback(pid, status,

691

self.current_checker_command)

1041

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

1042

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

1043

self.checker.join()

1044

self.checker = None

692

1045

# Start a new checker if needed

693

1046

if self.checker is None:

694

1047

# Escape attributes for the shell

695

escaped_attrs = dict(

696

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

697

for attr in

698

self.runtime_expansions)

1048

escaped_attrs = {

1049

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

1050

for attr in self.runtime_expansions }

699

1051

try:

700

1052

command = self.checker_command % escaped_attrs

701

1053

except TypeError as error:

702

1054

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

1055

self.checker_command,

1056

exc_info=error)

1057

return True # Try again later

705

1058

self.current_checker_command = command

706

try:

707

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

708

command, self.name)

709

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

710

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

711

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

712

# always replaced by /dev/null.)

713

self.checker = subprocess.Popen(command,

714

close_fds=True,

715

shell=True, cwd="/")

716

except OSError as error:

717

logger.error("Failed to start subprocess",

718

exc_info=error)

719

self.checker_callback_tag = (gobject.child_watch_add

720

(self.checker.pid,

721

self.checker_callback,

722

data=command))

723

# The checker may have completed before the gobject

724

# watch was added. Check for this.

725

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

726

if pid:

727

gobject.source_remove(self.checker_callback_tag)

728

self.checker_callback(pid, status, command)

729

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

1059

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

1060

self.name)

1061

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

1062

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

1063

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

1064

# always replaced by /dev/null.)

1065

# The exception is when not debugging but nevertheless

1066

# running in the foreground; use the previously

1067

# created wnull.

1068

popen_args = { "close_fds": True,

1069

"shell": True,

1070

"cwd": "/" }

1071

if (not self.server_settings["debug"]

1072

and self.server_settings["foreground"]):

1073

popen_args.update({"stdout": wnull,

1074

"stderr": wnull })

1075

pipe = multiprocessing.Pipe(duplex = False)

1076

self.checker = multiprocessing.Process(

1077

target = call_pipe,

1078

args = (pipe[1], subprocess.call, command),

1079

kwargs = popen_args)

1080

self.checker.start()

1081

self.checker_callback_tag = GLib.io_add_watch(

1082

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

1083

self.checker_callback, pipe[0], command)

1084

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

730

1085

return True

731

1086

732

1087

def stop_checker(self):

733

1088

"""Force the checker process, if any, to stop."""

734

1089

if self.checker_callback_tag:

735

gobject.source_remove(self.checker_callback_tag)

1090

GLib.source_remove(self.checker_callback_tag)

736

1091

self.checker_callback_tag = None

737

1092

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

738

1093

return

739

1094

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

740

try:

741

self.checker.terminate()

742

#time.sleep(0.5)

743

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

744

# self.checker.kill()

745

except OSError as error:

746

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

747

raise

1095

self.checker.terminate()

748

1096

self.checker = None

749

1097

750

1098

751

def dbus_service_property(dbus_interface, signature="v",

752

access="readwrite", byte_arrays=False):

1099

def dbus_service_property(dbus_interface,

1100

signature="v",

1101

access="readwrite",

1102

byte_arrays=False):

753

1103

"""Decorators for marking methods of a DBusObjectWithProperties to

754

1104

become properties on the D-Bus.

755

1105

764

1114

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

765

1115

if byte_arrays and signature != "ay":

766

1116

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

767

" signature {0!r}".format(signature))

1117

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

1118

768

1119

def decorator(func):

769

1120

func._dbus_is_property = True

770

1121

func._dbus_interface = dbus_interface

775

1126

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

776

1127

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

777

1128

return func

1129

778

1130

return decorator

779

1131

780

1132

789

1141

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

790

1142

"false"}

791

1143

"""

1144

792

1145

def decorator(func):

793

1146

func._dbus_is_interface = True

794

1147

func._dbus_interface = dbus_interface

795

1148

func._dbus_name = dbus_interface

796

1149

return func

1150

797

1151

return decorator

798

1152

799

1153

801

1155

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

802

1156

Usage:

803

1157

1158

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

1159

"org.freedesktop.DBus.Property."

1160

"EmitsChangedSignal": "false"})

804

1161

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

805

1162

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

809

1163

def Property_dbus_property(self):

810

1164

return dbus.Boolean(False)

1165

1166

See also the DBusObjectWithAnnotations class.

811

1167

"""

1168

812

1169

def decorator(func):

813

1170

func._dbus_annotations = annotations

814

1171

return func

1172

815

1173

return decorator

816

1174

817

1175

818

1176

class DBusPropertyException(dbus.exceptions.DBusException):

819

1177

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

820

1178

"""

821

def __unicode__(self):

822

return unicode(str(self))

1179

pass

823

1180

824

1181

825

1182

class DBusPropertyAccessException(DBusPropertyException):

834

1191

pass

835

1192

836

1193

837

class DBusObjectWithProperties(dbus.service.Object):

838

"""A D-Bus object with properties.

1194

class DBusObjectWithAnnotations(dbus.service.Object):

1195

"""A D-Bus object with annotations.

839

1196

840

Classes inheriting from this can use the dbus_service_property

841

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

842

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

1197

Classes inheriting from this can use the dbus_annotations

1198

decorator to add annotations to methods or signals.

843

1199

"""

844

1200

845

1201

@staticmethod

849

1205

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

850

1206

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

851

1207

"""

852

return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),

1208

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

853

1209

False)

854

1210

855

1211

def _get_all_dbus_things(self, thing):

856

1212

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

857

1213

"""

858

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

859

name),

1214

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

860

1215

athing.__get__(self))

861

1216

for cls in self.__class__.__mro__

862

1217

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

1218

inspect.getmembers(cls, self._is_dbus_thing(thing)))

1219

1220

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1221

out_signature = "s",

1222

path_keyword = 'object_path',

1223

connection_keyword = 'connection')

1224

def Introspect(self, object_path, connection):

1225

"""Overloading of standard D-Bus method.

1226

1227

Inserts annotation tags on methods and signals.

1228

"""

1229

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

1230

connection)

1231

try:

1232

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

1233

1234

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

1235

# Add annotation tags

1236

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

1237

for tag in if_tag.getElementsByTagName(typ):

1238

annots = dict()

1239

for name, prop in (self.

1240

_get_all_dbus_things(typ)):

1241

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

1242

and prop._dbus_interface

1243

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

1244

annots.update(getattr(

1245

prop, "_dbus_annotations", {}))

1246

for name, value in annots.items():

1247

ann_tag = document.createElement(

1248

"annotation")

1249

ann_tag.setAttribute("name", name)

1250

ann_tag.setAttribute("value", value)

1251

tag.appendChild(ann_tag)

1252

# Add interface annotation tags

1253

for annotation, value in dict(

1254

itertools.chain.from_iterable(

1255

annotations().items()

1256

for name, annotations

1257

in self._get_all_dbus_things("interface")

1258

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

1259

)).items():

1260

ann_tag = document.createElement("annotation")

1261

ann_tag.setAttribute("name", annotation)

1262

ann_tag.setAttribute("value", value)

1263

if_tag.appendChild(ann_tag)

1264

# Fix argument name for the Introspect method itself

1265

if (if_tag.getAttribute("name")

1266

== dbus.INTROSPECTABLE_IFACE):

1267

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

1268

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

1269

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

1270

if (arg.getAttribute("direction")

1271

== "out"):

1272

arg.setAttribute("name",

1273

"xml_data")

1274

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

1275

document.unlink()

1276

except (AttributeError, xml.dom.DOMException,

1277

xml.parsers.expat.ExpatError) as error:

1278

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

1279

exc_info=error)

1280

return xmlstring

1281

1282

1283

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1284

"""A D-Bus object with properties.

1285

1286

Classes inheriting from this can use the dbus_service_property

1287

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

1288

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

1289

"""

865

1290

866

1291

def _get_dbus_property(self, interface_name, property_name):

867

1292

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

868

1293

property with the specified name and interface.

869

1294

"""

870

for cls in self.__class__.__mro__:

871

for name, value in (inspect.getmembers

872

(cls,

873

self._is_dbus_thing("property"))):

1295

for cls in self.__class__.__mro__:

1296

for name, value in inspect.getmembers(

1297

cls, self._is_dbus_thing("property")):

874

1298

if (value._dbus_name == property_name

875

1299

and value._dbus_interface == interface_name):

876

1300

return value.__get__(self)

877

1301

878

1302

# No such property

879

raise DBusPropertyNotFound(self.dbus_object_path + ":"

880

+ interface_name + "."

881

+ property_name)

882

883

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

1303

raise DBusPropertyNotFound("{}:{}.{}".format(

1304

self.dbus_object_path, interface_name, property_name))

1305

1306

@classmethod

1307

def _get_all_interface_names(cls):

1308

"""Get a sequence of all interfaces supported by an object"""

1309

return (name for name in set(getattr(getattr(x, attr),

1310

"_dbus_interface", None)

1311

for x in (inspect.getmro(cls))

1312

for attr in dir(x))

1313

if name is not None)

1314

1315

@dbus.service.method(dbus.PROPERTIES_IFACE,

1316

in_signature="ss",

884

1317

out_signature="v")

885

1318

def Get(self, interface_name, property_name):

886

1319

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

904

1337

# The byte_arrays option is not supported yet on

905

1338

# signatures other than "ay".

906

1339

if prop._dbus_signature != "ay":

907

raise ValueError

1340

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

1341

"'ay' signature {!r}"

1342

.format(prop._dbus_signature))

908

1343

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

909

1344

for byte in value))

910

1345

prop(value)

911

1346

912

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

1347

@dbus.service.method(dbus.PROPERTIES_IFACE,

1348

in_signature="s",

913

1349

out_signature="a{sv}")

914

1350

def GetAll(self, interface_name):

915

1351

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

930

1366

if not hasattr(value, "variant_level"):

931

1367

properties[name] = value

932

1368

continue

933

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

934

value.variant_level+1)

1369

properties[name] = type(value)(

1370

value, variant_level = value.variant_level + 1)

935

1371

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

936

1372

1373

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

1374

def PropertiesChanged(self, interface_name, changed_properties,

1375

invalidated_properties):

1376

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

1377

standard.

1378

"""

1379

pass

1380

937

1381

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

938

1382

out_signature="s",

939

1383

path_keyword='object_path',

943

1387

944

1388

Inserts property tags and interface annotation tags.

945

1389

"""

946

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

947

connection)

1390

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1391

object_path,

1392

connection)

948

1393

try:

949

1394

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

1395

950

1396

def make_tag(document, name, prop):

951

1397

e = document.createElement("property")

952

1398

e.setAttribute("name", name)

953

1399

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

954

1400

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

955

1401

return e

1402

956

1403

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

957

1404

# Add property tags

958

1405

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

961

1408

if prop._dbus_interface

962

1409

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

963

1410

if_tag.appendChild(tag)

964

# Add annotation tags

965

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

966

for tag in if_tag.getElementsByTagName(typ):

967

annots = dict()

968

for name, prop in (self.

969

_get_all_dbus_things(typ)):

970

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

971

and prop._dbus_interface

972

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

973

annots.update(getattr

974

(prop,

975

"_dbus_annotations",

976

{}))

977

for name, value in annots.iteritems():

978

ann_tag = document.createElement(

979

"annotation")

980

ann_tag.setAttribute("name", name)

981

ann_tag.setAttribute("value", value)

982

tag.appendChild(ann_tag)

983

# Add interface annotation tags

984

for annotation, value in dict(

985

itertools.chain.from_iterable(

986

annotations().iteritems()

987

for name, annotations in

988

self._get_all_dbus_things("interface")

989

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

990

)).iteritems():

991

ann_tag = document.createElement("annotation")

992

ann_tag.setAttribute("name", annotation)

993

ann_tag.setAttribute("value", value)

994

if_tag.appendChild(ann_tag)

1411

# Add annotation tags for properties

1412

for tag in if_tag.getElementsByTagName("property"):

1413

annots = dict()

1414

for name, prop in self._get_all_dbus_things(

1415

"property"):

1416

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

1417

and prop._dbus_interface

1418

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

1419

annots.update(getattr(

1420

prop, "_dbus_annotations", {}))

1421

for name, value in annots.items():

1422

ann_tag = document.createElement(

1423

"annotation")

1424

ann_tag.setAttribute("name", name)

1425

ann_tag.setAttribute("value", value)

1426

tag.appendChild(ann_tag)

995

1427

# Add the names to the return values for the

996

1428

# "org.freedesktop.DBus.Properties" methods

997

1429

if (if_tag.getAttribute("name")

1015

1447

exc_info=error)

1016

1448

return xmlstring

1017

1449

1450

try:

1451

dbus.OBJECT_MANAGER_IFACE

1452

except AttributeError:

1453

dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"

1454

1455

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1456

"""A D-Bus object with an ObjectManager.

1457

1458

Classes inheriting from this exposes the standard

1459

GetManagedObjects call and the InterfacesAdded and

1460

InterfacesRemoved signals on the standard

1461

"org.freedesktop.DBus.ObjectManager" interface.

1462

1463

Note: No signals are sent automatically; they must be sent

1464

manually.

1465

"""

1466

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1467

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

1468

def GetManagedObjects(self):

1469

"""This function must be overridden"""

1470

raise NotImplementedError()

1471

1472

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1473

signature = "oa{sa{sv}}")

1474

def InterfacesAdded(self, object_path, interfaces_and_properties):

1475

pass

1476

1477

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")

1478

def InterfacesRemoved(self, object_path, interfaces):

1479

pass

1480

1481

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1482

out_signature = "s",

1483

path_keyword = 'object_path',

1484

connection_keyword = 'connection')

1485

def Introspect(self, object_path, connection):

1486

"""Overloading of standard D-Bus method.

1487

1488

Override return argument name of GetManagedObjects to be

1489

"objpath_interfaces_and_properties"

1490

"""

1491

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1492

object_path,

1493

connection)

1494

try:

1495

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

1496

1497

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

1498

# Fix argument name for the GetManagedObjects method

1499

if (if_tag.getAttribute("name")

1500

== dbus.OBJECT_MANAGER_IFACE):

1501

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

1502

if (cn.getAttribute("name")

1503

== "GetManagedObjects"):

1504

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

1505

if (arg.getAttribute("direction")

1506

== "out"):

1507

arg.setAttribute(

1508

"name",

1509

"objpath_interfaces"

1510

"_and_properties")

1511

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

1512

document.unlink()

1513

except (AttributeError, xml.dom.DOMException,

1514

xml.parsers.expat.ExpatError) as error:

1515

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

1516

exc_info = error)

1517

return xmlstring

1018

1518

1019

1519

def datetime_to_dbus(dt, variant_level=0):

1020

1520

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

1021

1521

if dt is None:

1022

1522

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

1023

return dbus.String(dt.isoformat(),

1024

variant_level=variant_level)

1523

return dbus.String(dt.isoformat(), variant_level=variant_level)

1025

1524

1026

1525

1027

1526

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1047

1546

(from DBusObjectWithProperties) and interfaces (from the

1048

1547

dbus_interface_annotations decorator).

1049

1548

"""

1549

1050

1550

def wrapper(cls):

1051

1551

for orig_interface_name, alt_interface_name in (

1052

alt_interface_names.iteritems()):

1552

alt_interface_names.items()):

1053

1553

attr = {}

1054

1554

interface_names = set()

1055

1555

# Go though all attributes of the class

1057

1557

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

1058

1558

# with the wrong interface name

1059

1559

if (not hasattr(attribute, "_dbus_interface")

1060

or not attribute._dbus_interface

1061

.startswith(orig_interface_name)):

1560

or not attribute._dbus_interface.startswith(

1561

orig_interface_name)):

1062

1562

continue

1063

1563

# Create an alternate D-Bus interface name based on

1064

1564

# the current name

1065

alt_interface = (attribute._dbus_interface

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1565

alt_interface = attribute._dbus_interface.replace(

1566

orig_interface_name, alt_interface_name)

1068

1567

interface_names.add(alt_interface)

1069

1568

# Is this a D-Bus signal?

1070

1569

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

1071

# Extract the original non-method function by

1072

# black magic

1073

nonmethod_func = (dict(

1570

# Extract the original non-method undecorated

1571

# function by black magic

1572

if sys.version_info.major == 2:

1573

nonmethod_func = (dict(

1074

1574

zip(attribute.func_code.co_freevars,

1075

attribute.__closure__))["func"]

1076

.cell_contents)

1575

attribute.__closure__))

1576

["func"].cell_contents)

1577

else:

1578

nonmethod_func = (dict(

1579

zip(attribute.__code__.co_freevars,

1580

attribute.__closure__))

1581

["func"].cell_contents)

1077

1582

# Create a new, but exactly alike, function

1078

1583

# object, and decorate it to be a new D-Bus signal

1079

1584

# with the alternate D-Bus interface name

1080

new_function = (dbus.service.signal

1081

(alt_interface,

1082

attribute._dbus_signature)

1083

(types.FunctionType(

1084

nonmethod_func.func_code,

1085

nonmethod_func.func_globals,

1086

nonmethod_func.func_name,

1087

nonmethod_func.func_defaults,

1088

nonmethod_func.func_closure)))

1585

new_function = copy_function(nonmethod_func)

1586

new_function = (dbus.service.signal(

1587

alt_interface,

1588

attribute._dbus_signature)(new_function))

1089

1589

# Copy annotations, if any

1090

1590

try:

1091

new_function._dbus_annotations = (

1092

dict(attribute._dbus_annotations))

1591

new_function._dbus_annotations = dict(

1592

attribute._dbus_annotations)

1093

1593

except AttributeError:

1094

1594

pass

1095

1595

# Define a creator of a function to call both the

1100

1600

"""This function is a scope container to pass

1101

1601

func1 and func2 to the "call_both" function

1102

1602

outside of its arguments"""

1603

1604

@functools.wraps(func2)

1103

1605

def call_both(*args, **kwargs):

1104

1606

"""This function will emit two D-Bus

1105

1607

signals by calling func1 and func2"""

1106

1608

func1(*args, **kwargs)

1107

1609

func2(*args, **kwargs)

1610

# Make wrapper function look like a D-Bus signal

1611

for name, attr in inspect.getmembers(func2):

1612

if name.startswith("_dbus_"):

1613

setattr(call_both, name, attr)

1614

1108

1615

return call_both

1109

1616

# Create the "call_both" function and add it to

1110

1617

# the class

1115

1622

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

1116

1623

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

1117

1624

# to the class.

1118

attr[attrname] = (dbus.service.method

1119

(alt_interface,

1120

attribute._dbus_in_signature,

1121

attribute._dbus_out_signature)

1122

(types.FunctionType

1123

(attribute.func_code,

1124

attribute.func_globals,

1125

attribute.func_name,

1126

attribute.func_defaults,

1127

attribute.func_closure)))

1625

attr[attrname] = (

1626

dbus.service.method(

1627

alt_interface,

1628

attribute._dbus_in_signature,

1629

attribute._dbus_out_signature)

1630

(copy_function(attribute)))

1128

1631

# Copy annotations, if any

1129

1632

try:

1130

attr[attrname]._dbus_annotations = (

1131

dict(attribute._dbus_annotations))

1633

attr[attrname]._dbus_annotations = dict(

1634

attribute._dbus_annotations)

1132

1635

except AttributeError:

1133

1636

pass

1134

1637

# Is this a D-Bus property?

1137

1640

# object, and decorate it to be a new D-Bus

1138

1641

# property with the alternate D-Bus interface

1139

1642

# name. Add it to the class.

1140

attr[attrname] = (dbus_service_property

1141

(alt_interface,

1142

attribute._dbus_signature,

1143

attribute._dbus_access,

1144

attribute

1145

._dbus_get_args_options

1146

["byte_arrays"])

1147

(types.FunctionType

1148

(attribute.func_code,

1149

attribute.func_globals,

1150

attribute.func_name,

1151

attribute.func_defaults,

1152

attribute.func_closure)))

1643

attr[attrname] = (dbus_service_property(

1644

alt_interface, attribute._dbus_signature,

1645

attribute._dbus_access,

1646

attribute._dbus_get_args_options

1647

["byte_arrays"])

1648

(copy_function(attribute)))

1153

1649

# Copy annotations, if any

1154

1650

try:

1155

attr[attrname]._dbus_annotations = (

1156

dict(attribute._dbus_annotations))

1651

attr[attrname]._dbus_annotations = dict(

1652

attribute._dbus_annotations)

1157

1653

except AttributeError:

1158

1654

pass

1159

1655

# Is this a D-Bus interface?

1162

1658

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

1163

1659

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

1164

1660

# to the class.

1165

attr[attrname] = (dbus_interface_annotations

1166

(alt_interface)

1167

(types.FunctionType

1168

(attribute.func_code,

1169

attribute.func_globals,

1170

attribute.func_name,

1171

attribute.func_defaults,

1172

attribute.func_closure)))

1661

attr[attrname] = (

1662

dbus_interface_annotations(alt_interface)

1663

(copy_function(attribute)))

1173

1664

if deprecate:

1174

1665

# Deprecate all alternate interfaces

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1666

iname="_AlternateDBusNames_interface_annotation{}"

1176

1667

for interface_name in interface_names:

1668

1177

1669

@dbus_interface_annotations(interface_name)

1178

1670

def func(self):

1179

1671

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

1180

"true" }

1672

"true" }

1181

1673

# Find an unused name

1182

1674

for aname in (iname.format(i)

1183

1675

for i in itertools.count()):

1187

1679

if interface_names:

1188

1680

# Replace the class with a new subclass of it with

1189

1681

# methods, signals, etc. as created above.

1190

cls = type(b"{0}Alternate".format(cls.__name__),

1191

(cls,), attr)

1682

if sys.version_info.major == 2:

1683

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

1684

(cls, ), attr)

1685

else:

1686

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

1687

(cls, ), attr)

1192

1688

return cls

1689

1193

1690

return wrapper

1194

1691

1195

1692

1196

1693

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

1197

"se.bsnet.fukt.Mandos"})

1694

"se.bsnet.fukt.Mandos"})

1198

1695

class ClientDBus(Client, DBusObjectWithProperties):

1199

1696

"""A Client class using D-Bus

1200

1697

1204

1701

"""

1205

1702

1206

1703

runtime_expansions = (Client.runtime_expansions

1207

+ ("dbus_object_path",))

1704

+ ("dbus_object_path", ))

1705

1706

_interface = "se.recompile.Mandos.Client"

1208

1707

1209

1708

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

1210

1709

1213

1712

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

1214

1713

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

1215

1714

# the D-Bus

1216

client_object_name = unicode(self.name).translate(

1715

client_object_name = str(self.name).translate(

1217

1716

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

1218

1717

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

1219

self.dbus_object_path = (dbus.ObjectPath

1220

("/clients/" + client_object_name))

1718

self.dbus_object_path = dbus.ObjectPath(

1719

"/clients/" + client_object_name)

1221

1720

DBusObjectWithProperties.__init__(self, self.bus,

1222

1721

self.dbus_object_path)

1223

1722

1224

def notifychangeproperty(transform_func,

1225

dbus_name, type_func=lambda x: x,

1226

variant_level=1):

1723

def notifychangeproperty(transform_func, dbus_name,

1724

type_func=lambda x: x,

1725

variant_level=1,

1726

invalidate_only=False,

1727

_interface=_interface):

1227

1728

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

1228

1729

its changes to DBus.

1229

1730

1234

1735

to the D-Bus. Default: no transform

1235

1736

variant_level: D-Bus variant level. Default: 1

1236

1737

"""

1237

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

1738

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

1739

1238

1740

def setter(self, value):

1239

1741

if hasattr(self, "dbus_object_path"):

1240

1742

if (not hasattr(self, attrname) or

1241

1743

type_func(getattr(self, attrname, None))

1242

1744

!= type_func(value)):

1243

dbus_value = transform_func(type_func(value),

1244

variant_level

1245

=variant_level)

1246

self.PropertyChanged(dbus.String(dbus_name),

1247

dbus_value)

1745

if invalidate_only:

1746

self.PropertiesChanged(

1747

_interface, dbus.Dictionary(),

1748

dbus.Array((dbus_name, )))

1749

else:

1750

dbus_value = transform_func(

1751

type_func(value),

1752

variant_level = variant_level)

1753

self.PropertyChanged(dbus.String(dbus_name),

1754

dbus_value)

1755

self.PropertiesChanged(

1756

_interface,

1757

dbus.Dictionary({ dbus.String(dbus_name):

1758

dbus_value }),

1759

dbus.Array())

1248

1760

setattr(self, attrname, value)

1249

1761

1250

1762

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

1256

1768

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

1257

1769

last_enabled = notifychangeproperty(datetime_to_dbus,

1258

1770

"LastEnabled")

1259

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

1260

type_func = lambda checker:

1261

checker is not None)

1771

checker = notifychangeproperty(

1772

dbus.Boolean, "CheckerRunning",

1773

type_func = lambda checker: checker is not None)

1262

1774

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1263

1775

"LastCheckedOK")

1264

1776

last_checker_status = notifychangeproperty(dbus.Int16,

1267

1779

datetime_to_dbus, "LastApprovalRequest")

1268

1780

approved_by_default = notifychangeproperty(dbus.Boolean,

1269

1781

"ApprovedByDefault")

1270

approval_delay = notifychangeproperty(dbus.UInt64,

1271

"ApprovalDelay",

1272

type_func =

1273

timedelta_to_milliseconds)

1782

approval_delay = notifychangeproperty(

1783

dbus.UInt64, "ApprovalDelay",

1784

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

1274

1785

approval_duration = notifychangeproperty(

1275

1786

dbus.UInt64, "ApprovalDuration",

1276

type_func = timedelta_to_milliseconds)

1787

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

1277

1788

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

1278

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

1279

type_func =

1280

timedelta_to_milliseconds)

1789

timeout = notifychangeproperty(

1790

dbus.UInt64, "Timeout",

1791

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

1281

1792

extended_timeout = notifychangeproperty(

1282

1793

dbus.UInt64, "ExtendedTimeout",

1283

type_func = timedelta_to_milliseconds)

1284

interval = notifychangeproperty(dbus.UInt64,

1285

"Interval",

1286

type_func =

1287

timedelta_to_milliseconds)

1794

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

1795

interval = notifychangeproperty(

1796

dbus.UInt64, "Interval",

1797

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

1288

1798

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

1799

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

1800

invalidate_only=True)

1289

1801

1290

1802

del notifychangeproperty

1291

1803

1298

1810

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

1299

1811

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

1300

1812

1301

def checker_callback(self, pid, condition, command,

1302

*args, **kwargs):

1303

self.checker_callback_tag = None

1304

self.checker = None

1305

if os.WIFEXITED(condition):

1306

exitstatus = os.WEXITSTATUS(condition)

1813

def checker_callback(self, source, condition,

1814

connection, command, *args, **kwargs):

1815

ret = Client.checker_callback(self, source, condition,

1816

connection, command, *args,

1817

**kwargs)

1818

exitstatus = self.last_checker_status

1819

if exitstatus >= 0:

1307

1820

# Emit D-Bus signal

1308

1821

self.CheckerCompleted(dbus.Int16(exitstatus),

1309

dbus.Int64(condition),

1822

# This is specific to GNU libC

1823

dbus.Int64(exitstatus << 8),

1310

1824

dbus.String(command))

1311

1825

else:

1312

1826

# Emit D-Bus signal

1313

1827

self.CheckerCompleted(dbus.Int16(-1),

1314

dbus.Int64(condition),

1828

dbus.Int64(

1829

# This is specific to GNU libC

1830

(exitstatus << 8)

1831

| self.last_checker_signal),

1315

1832

dbus.String(command))

1316

1317

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

1318

*args, **kwargs)

1833

return ret

1319

1834

1320

1835

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

1321

old_checker = self.checker

1322

if self.checker is not None:

1323

old_checker_pid = self.checker.pid

1324

else:

1325

old_checker_pid = None

1836

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

1326

1837

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

1327

1838

# Only if new checker process was started

1328

1839

if (self.checker is not None

1337

1848

1338

1849

def approve(self, value=True):

1339

1850

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

1341

(self.approval_duration),

1342

self._reset_approved)

1851

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

1852

* 1000), self._reset_approved)

1343

1853

self.send_changedstate()

1344

1854

1345

1855

## D-Bus methods, signals & properties

1346

_interface = "se.recompile.Mandos.Client"

1347

1856

1348

1857

## Interfaces

1349

1858

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1355

1859

## Signals

1356

1860

1357

1861

# CheckerCompleted - signal

1367

1871

pass

1368

1872

1369

1873

# PropertyChanged - signal

1874

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

1370

1875

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

1371

1876

def PropertyChanged(self, property, value):

1372

1877

"D-Bus signal"

1406

1911

self.checked_ok()

1407

1912

1408

1913

# Enable - method

1914

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

1409

1915

@dbus.service.method(_interface)

1410

1916

def Enable(self):

1411

1917

"D-Bus method"

1412

1918

self.enable()

1413

1919

1414

1920

# StartChecker - method

1921

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

1415

1922

@dbus.service.method(_interface)

1416

1923

def StartChecker(self):

1417

1924

"D-Bus method"

1418

1925

self.start_checker()

1419

1926

1420

1927

# Disable - method

1928

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

1421

1929

@dbus.service.method(_interface)

1422

1930

def Disable(self):

1423

1931

"D-Bus method"

1424

1932

self.disable()

1425

1933

1426

1934

# StopChecker - method

1935

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

1427

1936

@dbus.service.method(_interface)

1428

1937

def StopChecker(self):

1429

1938

self.stop_checker()

1436

1945

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

1437

1946

1438

1947

# ApprovedByDefault - property

1439

@dbus_service_property(_interface, signature="b",

1948

@dbus_service_property(_interface,

1949

signature="b",

1440

1950

access="readwrite")

1441

1951

def ApprovedByDefault_dbus_property(self, value=None):

1442

1952

if value is None: # get

1444

1954

self.approved_by_default = bool(value)

1445

1955

1446

1956

# ApprovalDelay - property

1447

@dbus_service_property(_interface, signature="t",

1957

@dbus_service_property(_interface,

1958

signature="t",

1448

1959

access="readwrite")

1449

1960

def ApprovalDelay_dbus_property(self, value=None):

1450

1961

if value is None: # get

1451

return dbus.UInt64(self.approval_delay_milliseconds())

1962

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

1963

* 1000)

1452

1964

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

1453

1965

1454

1966

# ApprovalDuration - property

1455

@dbus_service_property(_interface, signature="t",

1967

@dbus_service_property(_interface,

1968

signature="t",

1456

1969

access="readwrite")

1457

1970

def ApprovalDuration_dbus_property(self, value=None):

1458

1971

if value is None: # get

1459

return dbus.UInt64(timedelta_to_milliseconds(

1460

self.approval_duration))

1972

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

1973

* 1000)

1461

1974

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

1462

1975

1463

1976

# Name - property

1977

@dbus_annotations(

1978

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1464

1979

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

1465

1980

def Name_dbus_property(self):

1466

1981

return dbus.String(self.name)

1467

1982

1468

1983

# Fingerprint - property

1984

@dbus_annotations(

1985

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1469

1986

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

1470

1987

def Fingerprint_dbus_property(self):

1471

1988

return dbus.String(self.fingerprint)

1472

1989

1473

1990

# Host - property

1474

@dbus_service_property(_interface, signature="s",

1991

@dbus_service_property(_interface,

1992

signature="s",

1475

1993

access="readwrite")

1476

1994

def Host_dbus_property(self, value=None):

1477

1995

if value is None: # get

1478

1996

return dbus.String(self.host)

1479

self.host = unicode(value)

1997

self.host = str(value)

1480

1998

1481

1999

# Created - property

2000

@dbus_annotations(

2001

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1482

2002

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

1483

2003

def Created_dbus_property(self):

1484

2004

return datetime_to_dbus(self.created)

1489

2009

return datetime_to_dbus(self.last_enabled)

1490

2010

1491

2011

# Enabled - property

1492

@dbus_service_property(_interface, signature="b",

2012

@dbus_service_property(_interface,

2013

signature="b",

1493

2014

access="readwrite")

1494

2015

def Enabled_dbus_property(self, value=None):

1495

2016

if value is None: # get

1500

2021

self.disable()

1501

2022

1502

2023

# LastCheckedOK - property

1503

@dbus_service_property(_interface, signature="s",

2024

@dbus_service_property(_interface,

2025

signature="s",

1504

2026

access="readwrite")

1505

2027

def LastCheckedOK_dbus_property(self, value=None):

1506

2028

if value is not None:

1509

2031

return datetime_to_dbus(self.last_checked_ok)

1510

2032

1511

2033

# LastCheckerStatus - property

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

2034

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

1514

2035

def LastCheckerStatus_dbus_property(self):

1515

2036

return dbus.Int16(self.last_checker_status)

1516

2037

1525

2046

return datetime_to_dbus(self.last_approval_request)

1526

2047

1527

2048

# Timeout - property

1528

@dbus_service_property(_interface, signature="t",

2049

@dbus_service_property(_interface,

2050

signature="t",

1529

2051

access="readwrite")

1530

2052

def Timeout_dbus_property(self, value=None):

1531

2053

if value is None: # get

1532

return dbus.UInt64(self.timeout_milliseconds())

2054

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

1533

2055

old_timeout = self.timeout

1534

2056

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

1535

2057

# Reschedule disabling

1543

2065

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

1544

2066

is None):

1545

2067

return

1546

gobject.source_remove(self.disable_initiator_tag)

1547

self.disable_initiator_tag = (

1548

gobject.timeout_add(

1549

timedelta_to_milliseconds(self.expires - now),

1550

self.disable))

2068

GLib.source_remove(self.disable_initiator_tag)

2069

self.disable_initiator_tag = GLib.timeout_add(

2070

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

2071

self.disable)

1551

2072

1552

2073

# ExtendedTimeout - property

1553

@dbus_service_property(_interface, signature="t",

2074

@dbus_service_property(_interface,

2075

signature="t",

1554

2076

access="readwrite")

1555

2077

def ExtendedTimeout_dbus_property(self, value=None):

1556

2078

if value is None: # get

1557

return dbus.UInt64(self.extended_timeout_milliseconds())

2079

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

2080

* 1000)

1558

2081

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

1559

2082

1560

2083

# Interval - property

1561

@dbus_service_property(_interface, signature="t",

2084

@dbus_service_property(_interface,

2085

signature="t",

1562

2086

access="readwrite")

1563

2087

def Interval_dbus_property(self, value=None):

1564

2088

if value is None: # get

1565

return dbus.UInt64(self.interval_milliseconds())

2089

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

1566

2090

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

1567

2091

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

1568

2092

return

1569

2093

if self.enabled:

1570

2094

# Reschedule checker run

1571

gobject.source_remove(self.checker_initiator_tag)

1572

self.checker_initiator_tag = (gobject.timeout_add

1573

(value, self.start_checker))

1574

self.start_checker() # Start one now, too

2095

GLib.source_remove(self.checker_initiator_tag)

2096

self.checker_initiator_tag = GLib.timeout_add(

2097

value, self.start_checker)

2098

self.start_checker() # Start one now, too

1575

2099

1576

2100

# Checker - property

1577

@dbus_service_property(_interface, signature="s",

2101

@dbus_service_property(_interface,

2102

signature="s",

1578

2103

access="readwrite")

1579

2104

def Checker_dbus_property(self, value=None):

1580

2105

if value is None: # get

1581

2106

return dbus.String(self.checker_command)

1582

self.checker_command = unicode(value)

2107

self.checker_command = str(value)

1583

2108

1584

2109

# CheckerRunning - property

1585

@dbus_service_property(_interface, signature="b",

2110

@dbus_service_property(_interface,

2111

signature="b",

1586

2112

access="readwrite")

1587

2113

def CheckerRunning_dbus_property(self, value=None):

1588

2114

if value is None: # get

1593

2119

self.stop_checker()

1594

2120

1595

2121

# ObjectPath - property

2122

@dbus_annotations(

2123

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",

2124

"org.freedesktop.DBus.Deprecated": "true"})

1596

2125

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

1597

2126

def ObjectPath_dbus_property(self):

1598

2127

return self.dbus_object_path # is already a dbus.ObjectPath

1599

2128

1600

2129

# Secret = property

1601

@dbus_service_property(_interface, signature="ay",

1602

access="write", byte_arrays=True)

2130

@dbus_annotations(

2131

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

2132

"invalidates"})

2133

@dbus_service_property(_interface,

2134

signature="ay",

2135

access="write",

2136

byte_arrays=True)

1603

2137

def Secret_dbus_property(self, value):

1604

self.secret = str(value)

2138

self.secret = bytes(value)

1605

2139

1606

2140

del _interface

1607

2141

1611

2145

self._pipe = child_pipe

1612

2146

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

1613

2147

if not self._pipe.recv():

1614

raise KeyError()

2148

raise KeyError(fpr)

1615

2149

1616

2150

def __getattribute__(self, name):

1617

2151

if name == '_pipe':

1621

2155

if data[0] == 'data':

1622

2156

return data[1]

1623

2157

if data[0] == 'function':

2158

1624

2159

def func(*args, **kwargs):

1625

2160

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

1626

2161

return self._pipe.recv()[1]

2162

1627

2163

return func

1628

2164

1629

2165

def __setattr__(self, name, value):

1641

2177

def handle(self):

1642

2178

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

1643

2179

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

1644

unicode(self.client_address))

2180

str(self.client_address))

1645

2181

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

1646

2182

self.server.child_pipe.fileno())

1647

2183

1648

session = (gnutls.connection

1649

.ClientSession(self.request,

1650

gnutls.connection

1651

.X509Credentials()))

1652

1653

# Note: gnutls.connection.X509Credentials is really a

1654

# generic GnuTLS certificate credentials object so long as

1655

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

1656

# here despite using OpenPGP certificates.

2184

session = gnutls.ClientSession(self.request)

1657

2185

1658

2186

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

1659

2187

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

1663

2191

priority = self.server.gnutls_priority

1664

2192

if priority is None:

1665

2193

priority = "NORMAL"

1666

(gnutls.library.functions

1667

.gnutls_priority_set_direct(session._c_object,

1668

priority, None))

2194

gnutls.priority_set_direct(session._c_object,

2195

priority.encode("utf-8"),

2196

None)

1669

2197

1670

2198

# Start communication using the Mandos protocol

1671

2199

# Get protocol number

1673

2201

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

1674

2202

try:

1675

2203

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

1676

raise RuntimeError

2204

raise RuntimeError(line)

1677

2205

except (ValueError, IndexError, RuntimeError) as error:

1678

2206

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

1679

2207

return

1681

2209

# Start GnuTLS connection

1682

2210

try:

1683

2211

session.handshake()

1684

except gnutls.errors.GNUTLSError as error:

2212

except gnutls.Error as error:

1685

2213

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

1686

2214

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

1687

2215

# established. Just abandon the request.

1691

2219

approval_required = False

1692

2220

try:

1693

2221

try:

1694

fpr = self.fingerprint(self.peer_certificate

1695

(session))

1696

except (TypeError,

1697

gnutls.errors.GNUTLSError) as error:

2222

fpr = self.fingerprint(

2223

self.peer_certificate(session))

2224

except (TypeError, gnutls.Error) as error:

1698

2225

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

1699

2226

return

1700

2227

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

1713

2240

while True:

1714

2241

if not client.enabled:

1715

2242

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

1716

client.name)

2243

client.name)

1717

2244

if self.server.use_dbus:

1718

2245

# Emit D-Bus signal

1719

2246

client.Rejected("Disabled")

1728

2255

if self.server.use_dbus:

1729

2256

# Emit D-Bus signal

1730

2257

client.NeedApproval(

1731

client.approval_delay_milliseconds(),

1732

client.approved_by_default)

2258

client.approval_delay.total_seconds()

2259

* 1000, client.approved_by_default)

1733

2260

else:

1734

2261

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

1735

2262

client.name)

1741

2268

#wait until timeout or approved

1742

2269

time = datetime.datetime.now()

1743

2270

client.changedstate.acquire()

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

2271

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

1747

2272

client.changedstate.release()

1748

2273

time2 = datetime.datetime.now()

1749

2274

if (time2 - time) >= delay:

1760

2285

else:

1761

2286

delay -= time2 - time

1762

2287

1763

sent_size = 0

1764

while sent_size < len(client.secret):

1765

try:

1766

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

1767

except gnutls.errors.GNUTLSError as error:

1768

logger.warning("gnutls send failed",

1769

exc_info=error)

1770

return

1771

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

1772

sent, len(client.secret)

1773

- (sent_size + sent))

1774

sent_size += sent

2288

try:

2289

session.send(client.secret)

2290

except gnutls.Error as error:

2291

logger.warning("gnutls send failed",

2292

exc_info = error)

2293

return

1775

2294

1776

2295

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

1777

2296

# bump the timeout using extended_timeout

1785

2304

client.approvals_pending -= 1

1786

2305

try:

1787

2306

session.bye()

1788

except gnutls.errors.GNUTLSError as error:

2307

except gnutls.Error as error:

1789

2308

logger.warning("GnuTLS bye failed",

1790

2309

exc_info=error)

1791

2310

1793

2312

def peer_certificate(session):

1794

2313

"Return the peer's OpenPGP certificate as a bytestring"

1795

2314

# If not an OpenPGP certificate...

1796

if (gnutls.library.functions

1797

.gnutls_certificate_type_get(session._c_object)

1798

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1799

# ...do the normal thing

1800

return session.peer_certificate

2315

if (gnutls.certificate_type_get(session._c_object)

2316

!= gnutls.CRT_OPENPGP):

2317

# ...return invalid data

2318

return b""

1801

2319

list_size = ctypes.c_uint(1)

1802

cert_list = (gnutls.library.functions

1803

.gnutls_certificate_get_peers

2320

cert_list = (gnutls.certificate_get_peers

1804

2321

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

1805

2322

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

1806

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

1807

" certificate")

2323

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

1808

2324

if list_size.value == 0:

1809

2325

return None

1810

2326

cert = cert_list[0]

1814

2330

def fingerprint(openpgp):

1815

2331

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1816

2332

# New GnuTLS "datum" with the OpenPGP public key

1817

datum = (gnutls.library.types

1818

.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),

1819

ctypes.POINTER

1820

(ctypes.c_ubyte)),

1821

ctypes.c_uint(len(openpgp))))

2333

datum = gnutls.datum_t(

2334

ctypes.cast(ctypes.c_char_p(openpgp),

2335

ctypes.POINTER(ctypes.c_ubyte)),

2336

ctypes.c_uint(len(openpgp)))

1822

2337

# New empty GnuTLS certificate

1823

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1824

(gnutls.library.functions

1825

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2338

crt = gnutls.openpgp_crt_t()

2339

gnutls.openpgp_crt_init(ctypes.byref(crt))

1826

2340

# Import the OpenPGP public key into the certificate

1827

(gnutls.library.functions

1828

.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),

1829

gnutls.library.constants

1830

.GNUTLS_OPENPGP_FMT_RAW))

2341

gnutls.openpgp_crt_import(crt, ctypes.byref(datum),

2342

gnutls.OPENPGP_FMT_RAW)

1831

2343

# Verify the self signature in the key

1832

2344

crtverify = ctypes.c_uint()

1833

(gnutls.library.functions

1834

.gnutls_openpgp_crt_verify_self(crt, 0,

1835

ctypes.byref(crtverify)))

2345

gnutls.openpgp_crt_verify_self(crt, 0,

2346

ctypes.byref(crtverify))

1836

2347

if crtverify.value != 0:

1837

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1838

raise (gnutls.errors.CertificateSecurityError

1839

("Verify failed"))

2348

gnutls.openpgp_crt_deinit(crt)

2349

raise gnutls.CertificateSecurityError("Verify failed")

1840

2350

# New buffer for the fingerprint

1841

2351

buf = ctypes.create_string_buffer(20)

1842

2352

buf_len = ctypes.c_size_t()

1843

2353

# Get the fingerprint from the certificate into the buffer

1844

(gnutls.library.functions

1845

.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

1846

ctypes.byref(buf_len)))

2354

gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

2355

ctypes.byref(buf_len))

1847

2356

# Deinit the certificate

1848

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2357

gnutls.openpgp_crt_deinit(crt)

1849

2358

# Convert the buffer to a Python bytestring

1850

2359

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

1851

2360

# Convert the bytestring to hexadecimal notation

1855

2364

1856

2365

class MultiprocessingMixIn(object):

1857

2366

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

2367

1858

2368

def sub_process_main(self, request, address):

1859

2369

try:

1860

2370

self.finish_request(request, address)

1872

2382

1873

2383

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1874

2384

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

2385

1875

2386

def process_request(self, request, client_address):

1876

2387

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

1877

2388

1886

2397

1887

2398

def add_pipe(self, parent_pipe, proc):

1888

2399

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

1889

raise NotImplementedError

2400

raise NotImplementedError()

1890

2401

1891

2402

1892

2403

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1898

2409

interface: None or a network interface name (string)

1899

2410

use_ipv6: Boolean; to use IPv6 or not

1900

2411

"""

2412

1901

2413

def __init__(self, server_address, RequestHandlerClass,

1902

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

2414

interface=None,

2415

use_ipv6=True,

2416

socketfd=None):

1903

2417

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

1904

2418

creating a new one with socket.socket().

1905

2419

"""

1939

2453

"""This overrides the normal server_bind() function

1940

2454

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

1941

2455

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

2456

global SO_BINDTODEVICE

1942

2457

if self.interface is not None:

1943

2458

if SO_BINDTODEVICE is None:

1944

logger.error("SO_BINDTODEVICE does not exist;"

1945

" cannot bind to interface %s",

1946

self.interface)

1947

else:

1948

try:

1949

self.socket.setsockopt(socket.SOL_SOCKET,

1950

SO_BINDTODEVICE,

1951

str(self.interface

1952

+ '\0'))

1953

except socket.error as error:

1954

if error.errno == errno.EPERM:

1955

logger.error("No permission to"

1956

" bind to interface %s",

1957

self.interface)

1958

elif error.errno == errno.ENOPROTOOPT:

1959

logger.error("SO_BINDTODEVICE not available;"

1960

" cannot bind to interface %s",

1961

self.interface)

1962

elif error.errno == errno.ENODEV:

1963

logger.error("Interface %s does not"

1964

" exist, cannot bind",

1965

self.interface)

1966

else:

1967

raise

2459

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

2460

# common enough.

2461

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

2462

SO_BINDTODEVICE = 25

2463

try:

2464

self.socket.setsockopt(

2465

socket.SOL_SOCKET, SO_BINDTODEVICE,

2466

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

2467

except socket.error as error:

2468

if error.errno == errno.EPERM:

2469

logger.error("No permission to bind to"

2470

" interface %s", self.interface)

2471

elif error.errno == errno.ENOPROTOOPT:

2472

logger.error("SO_BINDTODEVICE not available;"

2473

" cannot bind to interface %s",

2474

self.interface)

2475

elif error.errno == errno.ENODEV:

2476

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

2477

" cannot bind", self.interface)

2478

else:

2479

raise

1968

2480

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

1969

2481

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

1970

2482

if not self.server_address[0]:

1971

2483

if self.address_family == socket.AF_INET6:

1972

2484

any_address = "::" # in6addr_any

1973

2485

else:

1974

any_address = socket.INADDR_ANY

2486

any_address = "0.0.0.0" # INADDR_ANY

1975

2487

self.server_address = (any_address,

1976

2488

self.server_address[1])

1977

2489

elif not self.server_address[1]:

1978

self.server_address = (self.server_address[0],

1979

0)

2490

self.server_address = (self.server_address[0], 0)

1980

2491

# if self.interface:

1981

2492

# self.server_address = (self.server_address[0],

1982

2493

# 0, # port

1994

2505

gnutls_priority GnuTLS priority string

1995

2506

use_dbus: Boolean; to emit D-Bus signals or not

1996

2507

1997

Assumes a gobject.MainLoop event loop.

2508

Assumes a GLib.MainLoop event loop.

1998

2509

"""

2510

1999

2511

def __init__(self, server_address, RequestHandlerClass,

2000

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

2001

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

2512

interface=None,

2513

use_ipv6=True,

2514

clients=None,

2515

gnutls_priority=None,

2516

use_dbus=True,

2517

socketfd=None):

2002

2518

self.enabled = False

2003

2519

self.clients = clients

2004

2520

if self.clients is None:

2010

2526

interface = interface,

2011

2527

use_ipv6 = use_ipv6,

2012

2528

socketfd = socketfd)

2529

2013

2530

def server_activate(self):

2014

2531

if self.enabled:

2015

2532

return socketserver.TCPServer.server_activate(self)

2019

2536

2020

2537

def add_pipe(self, parent_pipe, proc):

2021

2538

# Call "handle_ipc" for both data and EOF events

2022

gobject.io_add_watch(parent_pipe.fileno(),

2023

gobject.IO_IN | gobject.IO_HUP,

2024

functools.partial(self.handle_ipc,

2025

parent_pipe =

2026

parent_pipe,

2027

proc = proc))

2539

GLib.io_add_watch(

2540

parent_pipe.fileno(),

2541

GLib.IO_IN | GLib.IO_HUP,

2542

functools.partial(self.handle_ipc,

2543

parent_pipe = parent_pipe,

2544

proc = proc))

2028

2545

2029

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

2030

proc = None, client_object=None):

2546

def handle_ipc(self, source, condition,

2547

parent_pipe=None,

2548

proc = None,

2549

client_object=None):

2031

2550

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

2032

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

2551

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

2033

2552

# Wait for other process to exit

2034

2553

proc.join()

2035

2554

return False

2042

2561

fpr = request[1]

2043

2562

address = request[2]

2044

2563

2045

for c in self.clients.itervalues():

2564

for c in self.clients.values():

2046

2565

if c.fingerprint == fpr:

2047

2566

client = c

2048

2567

break

2056

2575

parent_pipe.send(False)

2057

2576

return False

2058

2577

2059

gobject.io_add_watch(parent_pipe.fileno(),

2060

gobject.IO_IN | gobject.IO_HUP,

2061

functools.partial(self.handle_ipc,

2062

parent_pipe =

2063

parent_pipe,

2064

proc = proc,

2065

client_object =

2066

client))

2578

GLib.io_add_watch(

2579

parent_pipe.fileno(),

2580

GLib.IO_IN | GLib.IO_HUP,

2581

functools.partial(self.handle_ipc,

2582

parent_pipe = parent_pipe,

2583

proc = proc,

2584

client_object = client))

2067

2585

parent_pipe.send(True)

2068

2586

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

2069

2587

# same fileno

2075

2593

2076

2594

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

2077

2595

funcname)(*args,

2078

**kwargs)))

2596

**kwargs)))

2079

2597

2080

2598

if command == 'getattr':

2081

2599

attrname = request[1]

2082

if callable(client_object.__getattribute__(attrname)):

2083

parent_pipe.send(('function',))

2600

if isinstance(client_object.__getattribute__(attrname),

2601

collections.Callable):

2602

parent_pipe.send(('function', ))

2084

2603

else:

2085

parent_pipe.send(('data', client_object

2086

.__getattribute__(attrname)))

2604

parent_pipe.send((

2605

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

2087

2606

2088

2607

if command == 'setattr':

2089

2608

attrname = request[1]

2093

2612

return True

2094

2613

2095

2614

2615

def rfc3339_duration_to_delta(duration):

2616

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

2617

2618

>>> rfc3339_duration_to_delta("P7D")

2619

datetime.timedelta(7)

2620

>>> rfc3339_duration_to_delta("PT60S")

2621

datetime.timedelta(0, 60)

2622

>>> rfc3339_duration_to_delta("PT60M")

2623

datetime.timedelta(0, 3600)

2624

>>> rfc3339_duration_to_delta("PT24H")

2625

datetime.timedelta(1)

2626

>>> rfc3339_duration_to_delta("P1W")

2627

datetime.timedelta(7)

2628

>>> rfc3339_duration_to_delta("PT5M30S")

2629

datetime.timedelta(0, 330)

2630

>>> rfc3339_duration_to_delta("P1DT3M20S")

2631

datetime.timedelta(1, 200)

2632

"""

2633

2634

# Parsing an RFC 3339 duration with regular expressions is not

2635

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

2636

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

2637

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

2638

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

2639

# avoid excessive use of external libraries.

2640

2641

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

2642

Token = collections.namedtuple("Token", (

2643

"regexp", # To match token; if "value" is not None, must have

2644

# a "group" containing digits

2645

"value", # datetime.timedelta or None

2646

"followers")) # Tokens valid after this token

2647

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

2648

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

2649

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

2650

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

2651

datetime.timedelta(seconds=1),

2652

frozenset((token_end, )))

2653

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

2654

datetime.timedelta(minutes=1),

2655

frozenset((token_second, token_end)))

2656

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

2657

datetime.timedelta(hours=1),

2658

frozenset((token_minute, token_end)))

2659

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

2660

None,

2661

frozenset((token_hour, token_minute,

2662

token_second)))

2663

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

2664

datetime.timedelta(days=1),

2665

frozenset((token_time, token_end)))

2666

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

2667

datetime.timedelta(weeks=4),

2668

frozenset((token_day, token_end)))

2669

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

2670

datetime.timedelta(weeks=52),

2671

frozenset((token_month, token_end)))

2672

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

2673

datetime.timedelta(weeks=1),

2674

frozenset((token_end, )))

2675

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

2676

frozenset((token_year, token_month,

2677

token_day, token_time,

2678

token_week)))

2679

# Define starting values

2680

value = datetime.timedelta() # Value so far

2681

found_token = None

2682

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

2683

s = duration # String left to parse

2684

# Loop until end token is found

2685

while found_token is not token_end:

2686

# Search for any currently valid tokens

2687

for token in followers:

2688

match = token.regexp.match(s)

2689

if match is not None:

2690

# Token found

2691

if token.value is not None:

2692

# Value found, parse digits

2693

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

2694

# Add to value so far

2695

value += factor * token.value

2696

# Strip token from string

2697

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

2698

# Go to found token

2699

found_token = token

2700

# Set valid next tokens

2701

followers = found_token.followers

2702

break

2703

else:

2704

# No currently valid tokens were found

2705

raise ValueError("Invalid RFC 3339 duration: {!r}"

2706

.format(duration))

2707

# End token found

2708

return value

2709

2710

2096

2711

def string_to_delta(interval):

2097

2712

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

2098

2713

2109

2724

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

2110

2725

datetime.timedelta(0, 330)

2111

2726

"""

2727

2728

try:

2729

return rfc3339_duration_to_delta(interval)

2730

except ValueError:

2731

pass

2732

2112

2733

timevalue = datetime.timedelta(0)

2113

2734

for s in interval.split():

2114

2735

try:

2115

suffix = unicode(s[-1])

2736

suffix = s[-1]

2116

2737

value = int(s[:-1])

2117

2738

if suffix == "d":

2118

2739

delta = datetime.timedelta(value)

2125

2746

elif suffix == "w":

2126

2747

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

2127

2748

else:

2128

raise ValueError("Unknown suffix {0!r}"

2129

.format(suffix))

2130

except (ValueError, IndexError) as e:

2749

raise ValueError("Unknown suffix {!r}".format(suffix))

2750

except IndexError as e:

2131

2751

raise ValueError(*(e.args))

2132

2752

timevalue += delta

2133

2753

return timevalue

2149

2769

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

2150

2770

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

2151

2771

raise OSError(errno.ENODEV,

2152

"{0} not a character device"

2772

"{} not a character device"

2153

2773

.format(os.devnull))

2154

2774

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

2155

2775

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

2165

2785

2166

2786

parser = argparse.ArgumentParser()

2167

2787

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

2168

version = "%(prog)s {0}".format(version),

2788

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

2169

2789

help="show version number and exit")

2170

2790

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

2171

2791

help="Bind to interface IF")

2177

2797

help="Run self-test")

2178

2798

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

2179

2799

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

2180

" to terminal")

2800

" to terminal", default=None)

2181

2801

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

2182

2802

help="Debug level for stdout output")

2183

2803

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

2190

2810

" files")

2191

2811

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

2192

2812

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

2193

" system bus interface")

2813

" system bus interface", default=None)

2194

2814

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

2195

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

2815

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

2816

default=None)

2196

2817

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

2197

2818

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

2198

" state")

2819

" state", default=None)

2199

2820

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

2200

2821

help="Specify a file descriptor to a network"

2201

2822

" socket to use instead of creating one")

2202

2823

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

2203

2824

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

2825

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

2826

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

2827

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

2828

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

2829

default=None)

2204

2830

2205

2831

options = parser.parse_args()

2206

2832

2207

2833

if options.check:

2208

2834

import doctest

2209

doctest.testmod()

2210

sys.exit()

2835

fail_count, test_count = doctest.testmod()

2836

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

2211

2837

2212

2838

# Default values for config file for server-global settings

2213

2839

server_defaults = { "interface": "",

2215

2841

"port": "",

2216

2842

"debug": "False",

2217

2843

"priority":

2218

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

2844

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

2845

":+SIGN-DSA-SHA256",

2219

2846

"servicename": "Mandos",

2220

2847

"use_dbus": "True",

2221

2848

"use_ipv6": "True",

2222

2849

"debuglevel": "",

2223

2850

"restore": "True",

2224

2851

"socket": "",

2225

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

2226

}

2852

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

2853

"foreground": "False",

2854

"zeroconf": "True",

2855

}

2227

2856

2228

2857

# Parse config file for server-global settings

2229

2858

server_config = configparser.SafeConfigParser(server_defaults)

2230

2859

del server_defaults

2231

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

2232

"mandos.conf"))

2860

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

2233

2861

# Convert the SafeConfigParser object to a dict

2234

2862

server_settings = server_config.defaults()

2235

2863

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

2236

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

2864

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

2237

2865

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

2238

2866

option)

2239

2867

if server_settings["port"]:

2253

2881

# Override the settings from the config file with command line

2254

2882

# options, if set.

2255

2883

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

2256

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

2257

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

2258

"statedir", "socket"):

2884

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

2885

"use_ipv6", "debuglevel", "restore", "statedir",

2886

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

2259

2887

value = getattr(options, option)

2260

2888

if value is not None:

2261

2889

server_settings[option] = value

2262

2890

del options

2263

2891

# Force all strings to be unicode

2264

2892

for option in server_settings.keys():

2265

if type(server_settings[option]) is str:

2266

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

2893

if isinstance(server_settings[option], bytes):

2894

server_settings[option] = (server_settings[option]

2895

.decode("utf-8"))

2896

# Force all boolean options to be boolean

2897

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

2898

"foreground", "zeroconf"):

2899

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

2900

# Debug implies foreground

2901

if server_settings["debug"]:

2902

server_settings["foreground"] = True

2267

2903

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

2268

2904

2269

2905

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

2270

2906

2907

if (not server_settings["zeroconf"]

2908

and not (server_settings["port"]

2909

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

2910

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

2911

2271

2912

# For convenience

2272

2913

debug = server_settings["debug"]

2273

2914

debuglevel = server_settings["debuglevel"]

2275

2916

use_ipv6 = server_settings["use_ipv6"]

2276

2917

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

2277

2918

stored_state_file)

2919

foreground = server_settings["foreground"]

2920

zeroconf = server_settings["zeroconf"]

2278

2921

2279

2922

if debug:

2280

2923

initlogger(debug, logging.DEBUG)

2286

2929

initlogger(debug, level)

2287

2930

2288

2931

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

2289

syslogger.setFormatter(logging.Formatter

2290

('Mandos ({0}) [%(process)d]:'

2291

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

2292

.format(server_settings

2293

["servicename"])))

2932

syslogger.setFormatter(

2933

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

2934

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

2935

server_settings["servicename"])))

2294

2936

2295

2937

# Parse config file with clients

2296

2938

client_config = configparser.SafeConfigParser(Client

2301

2943

global mandos_dbus_service

2302

2944

mandos_dbus_service = None

2303

2945

2304

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

2305

server_settings["port"]),

2306

ClientHandler,

2307

interface=(server_settings["interface"]

2308

or None),

2309

use_ipv6=use_ipv6,

2310

gnutls_priority=

2311

server_settings["priority"],

2312

use_dbus=use_dbus,

2313

socketfd=(server_settings["socket"]

2314

or None))

2315

if not debug:

2316

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

2946

socketfd = None

2947

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

2948

socketfd = server_settings["socket"]

2949

tcp_server = MandosServer(

2950

(server_settings["address"], server_settings["port"]),

2951

ClientHandler,

2952

interface=(server_settings["interface"] or None),

2953

use_ipv6=use_ipv6,

2954

gnutls_priority=server_settings["priority"],

2955

use_dbus=use_dbus,

2956

socketfd=socketfd)

2957

if not foreground:

2958

pidfilename = "/run/mandos.pid"

2959

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

2960

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

2961

pidfile = None

2317

2962

try:

2318

pidfile = open(pidfilename, "w")

2963

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

2319

2964

except IOError as e:

2320

2965

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

2321

2966

exc_info=e)

2322

2967

2323

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

2968

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

2969

("mandos", "mandos"),

2970

("nobody", "nogroup")):

2324

2971

try:

2325

2972

uid = pwd.getpwnam(name).pw_uid

2326

gid = pwd.getpwnam(name).pw_gid

2973

gid = pwd.getpwnam(group).pw_gid

2327

2974

break

2328

2975

except KeyError:

2329

2976

continue

2333

2980

try:

2334

2981

os.setgid(gid)

2335

2982

os.setuid(uid)

2983

if debug:

2984

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

2985

gid))

2336

2986

except OSError as error:

2987

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

2988

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

2337

2989

if error.errno != errno.EPERM:

2338

raise error

2990

raise

2339

2991

2340

2992

if debug:

2341

2993

# Enable all possible GnuTLS debugging

2342

2994

2343

2995

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

2344

2996

# - GnuTLS manual

2345

gnutls.library.functions.gnutls_global_set_log_level(11)

2997

gnutls.global_set_log_level(11)

2346

2998

2347

@gnutls.library.types.gnutls_log_func

2999

@gnutls.log_func

2348

3000

def debug_gnutls(level, string):

2349

3001

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

2350

3002

2351

(gnutls.library.functions

2352

.gnutls_global_set_log_function(debug_gnutls))

3003

gnutls.global_set_log_function(debug_gnutls)

2353

3004

2354

3005

# Redirect stdin so all checkers get /dev/null

2355

3006

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

2358

3009

os.close(null)

2359

3010

2360

3011

# Need to fork before connecting to D-Bus

2361

if not debug:

3012

if not foreground:

2362

3013

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

2363

3014

daemon()

2364

3015

2365

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

2366

# need to inform gobject that threads will be used.

2367

gobject.threads_init()

3016

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

3017

# to inform GLib that threads will be used.

3018

GLib.threads_init()

2368

3019

2369

3020

global main_loop

2370

3021

# From the Avahi example code

2371

3022

DBusGMainLoop(set_as_default=True)

2372

main_loop = gobject.MainLoop()

3023

main_loop = GLib.MainLoop()

2373

3024

bus = dbus.SystemBus()

2374

3025

# End of Avahi example code

2375

3026

if use_dbus:

2376

3027

try:

2377

3028

bus_name = dbus.service.BusName("se.recompile.Mandos",

2378

bus, do_not_queue=True)

2379

old_bus_name = (dbus.service.BusName

2380

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

2381

do_not_queue=True))

2382

except dbus.exceptions.NameExistsException as e:

3029

bus,

3030

do_not_queue=True)

3031

old_bus_name = dbus.service.BusName(

3032

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

3033

do_not_queue=True)

3034

except dbus.exceptions.DBusException as e:

2383

3035

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

2384

3036

use_dbus = False

2385

3037

server_settings["use_dbus"] = False

2386

3038

tcp_server.use_dbus = False

2387

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2388

service = AvahiServiceToSyslog(name =

2389

server_settings["servicename"],

2390

servicetype = "_mandos._tcp",

2391

protocol = protocol, bus = bus)

2392

if server_settings["interface"]:

2393

service.interface = (if_nametoindex

2394

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

3039

if zeroconf:

3040

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3041

service = AvahiServiceToSyslog(

3042

name = server_settings["servicename"],

3043

servicetype = "_mandos._tcp",

3044

protocol = protocol,

3045

bus = bus)

3046

if server_settings["interface"]:

3047

service.interface = if_nametoindex(

3048

server_settings["interface"].encode("utf-8"))

2395

3049

2396

3050

global multiprocessing_manager

2397

3051

multiprocessing_manager = multiprocessing.Manager()

2404

3058

old_client_settings = {}

2405

3059

clients_data = {}

2406

3060

3061

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

3062

global wnull

3063

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

3064

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

3065

# mode

3066

if debug or not foreground:

3067

wnull.close()

3068

2407

3069

# Get client data and settings from last running state.

2408

3070

if server_settings["restore"]:

2409

3071

try:

2410

3072

with open(stored_state_path, "rb") as stored_state:

2411

clients_data, old_client_settings = (pickle.load

2412

(stored_state))

3073

if sys.version_info.major == 2:

3074

clients_data, old_client_settings = pickle.load(

3075

stored_state)

3076

else:

3077

bytes_clients_data, bytes_old_client_settings = (

3078

pickle.load(stored_state, encoding = "bytes"))

3079

### Fix bytes to strings

3080

## clients_data

3081

# .keys()

3082

clients_data = { (key.decode("utf-8")

3083

if isinstance(key, bytes)

3084

else key): value

3085

for key, value in

3086

bytes_clients_data.items() }

3087

del bytes_clients_data

3088

for key in clients_data:

3089

value = { (k.decode("utf-8")

3090

if isinstance(k, bytes) else k): v

3091

for k, v in

3092

clients_data[key].items() }

3093

clients_data[key] = value

3094

# .client_structure

3095

value["client_structure"] = [

3096

(s.decode("utf-8")

3097

if isinstance(s, bytes)

3098

else s) for s in

3099

value["client_structure"] ]

3100

# .name & .host

3101

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

3102

if isinstance(value[k], bytes):

3103

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

3104

## old_client_settings

3105

# .keys()

3106

old_client_settings = {

3107

(key.decode("utf-8")

3108

if isinstance(key, bytes)

3109

else key): value

3110

for key, value in

3111

bytes_old_client_settings.items() }

3112

del bytes_old_client_settings

3113

# .host

3114

for value in old_client_settings.values():

3115

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

3116

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

3117

.decode("utf-8"))

2413

3118

os.remove(stored_state_path)

2414

3119

except IOError as e:

2415

3120

if e.errno == errno.ENOENT:

2416

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

2417

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

3121

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

3122

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

2418

3123

else:

2419

3124

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

2420

3125

exc_info=e)

2421

3126

raise

2422

3127

except EOFError as e:

2423

3128

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

2424

"EOFError:", exc_info=e)

3129

"EOFError:",

3130

exc_info=e)

2425

3131

2426

3132

with PGPEngine() as pgp:

2427

for client_name, client in clients_data.iteritems():

3133

for client_name, client in clients_data.items():

3134

# Skip removed clients

3135

if client_name not in client_settings:

3136

continue

3137

2428

3138

# Decide which value to use after restoring saved state.

2429

3139

# We have three different values: Old config file,

2430

3140

# new config file, and saved state.

2435

3145

# For each value in new config, check if it

2436

3146

# differs from the old config value (Except for

2437

3147

# the "secret" attribute)

2438

if (name != "secret" and

2439

value != old_client_settings[client_name]

2440

[name]):

3148

if (name != "secret"

3149

and (value !=

3150

old_client_settings[client_name][name])):

2441

3151

client[name] = value

2442

3152

except KeyError:

2443

3153

pass

2444

3154

2445

3155

# Clients who has passed its expire date can still be

2446

# enabled if its last checker was successful. Clients

3156

# enabled if its last checker was successful. A Client

2447

3157

# whose checker succeeded before we stored its state is

2448

3158

# assumed to have successfully run all checkers during

2449

3159

# downtime.

2451

3161

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

2452

3162

if not client["last_checked_ok"]:

2453

3163

logger.warning(

2454

"disabling client {0} - Client never "

2455

"performed a successful checker"

2456

.format(client_name))

3164

"disabling client {} - Client never "

3165

"performed a successful checker".format(

3166

client_name))

2457

3167

client["enabled"] = False

2458

3168

elif client["last_checker_status"] != 0:

2459

3169

logger.warning(

2460

"disabling client {0} - Client "

2461

"last checker failed with error code {1}"

2462

.format(client_name,

2463

client["last_checker_status"]))

3170

"disabling client {} - Client last"

3171

" checker failed with error code"

3172

" {}".format(

3173

client_name,

3174

client["last_checker_status"]))

2464

3175

client["enabled"] = False

2465

3176

else:

2466

client["expires"] = (datetime.datetime

2467

.utcnow()

2468

+ client["timeout"])

3177

client["expires"] = (

3178

datetime.datetime.utcnow()

3179

+ client["timeout"])

2469

3180

logger.debug("Last checker succeeded,"

2470

" keeping {0} enabled"

2471

.format(client_name))

3181

" keeping {} enabled".format(

3182

client_name))

2472

3183

try:

2473

client["secret"] = (

2474

pgp.decrypt(client["encrypted_secret"],

2475

client_settings[client_name]

2476

["secret"]))

3184

client["secret"] = pgp.decrypt(

3185

client["encrypted_secret"],

3186

client_settings[client_name]["secret"])

2477

3187

except PGPError:

2478

3188

# If decryption fails, we use secret from new settings

2479

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

2480

.format(client_name))

2481

client["secret"] = (

2482

client_settings[client_name]["secret"])

3189

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

3190

client_name))

3191

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

3192

["secret"])

2483

3193

2484

3194

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

2485

3195

for client_name in (set(old_client_settings)

2490

3200

clients_data[client_name] = client_settings[client_name]

2491

3201

2492

3202

# Create all client objects

2493

for client_name, client in clients_data.iteritems():

3203

for client_name, client in clients_data.items():

2494

3204

tcp_server.clients[client_name] = client_class(

2495

name = client_name, settings = client)

3205

name = client_name,

3206

settings = client,

3207

server_settings = server_settings)

2496

3208

2497

3209

if not tcp_server.clients:

2498

3210

logger.warning("No clients defined")

2499

3211

2500

if not debug:

2501

try:

2502

with pidfile:

2503

pid = os.getpid()

2504

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

2505

del pidfile

2506

except IOError:

2507

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

2508

pidfilename, pid)

2509

except NameError:

2510

# "pidfile" was never created

2511

pass

3212

if not foreground:

3213

if pidfile is not None:

3214

pid = os.getpid()

3215

try:

3216

with pidfile:

3217

print(pid, file=pidfile)

3218

except IOError:

3219

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

3220

pidfilename, pid)

3221

del pidfile

2512

3222

del pidfilename

2513

3223

2514

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

2515

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

3224

for termsig in (signal.SIGHUP, signal.SIGTERM):

3225

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3226

lambda: main_loop.quit() and False)

2516

3227

2517

3228

if use_dbus:

2518

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

2519

"se.bsnet.fukt.Mandos"})

2520

class MandosDBusService(DBusObjectWithProperties):

3229

3230

@alternate_dbus_interfaces(

3231

{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })

3232

class MandosDBusService(DBusObjectWithObjectManager):

2521

3233

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

3234

2522

3235

def __init__(self):

2523

3236

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

3237

2524

3238

_interface = "se.recompile.Mandos"

2525

3239

2526

@dbus_interface_annotations(_interface)

2527

def _foo(self):

2528

return { "org.freedesktop.DBus.Property"

2529

".EmitsChangedSignal":

2530

"false"}

2531

2532

3240

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

2533

3241

def ClientAdded(self, objpath):

2534

3242

"D-Bus signal"

2539

3247

"D-Bus signal"

2540

3248

pass

2541

3249

3250

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

3251

"true"})

2542

3252

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

2543

3253

def ClientRemoved(self, objpath, name):

2544

3254

"D-Bus signal"

2545

3255

pass

2546

3256

3257

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

3258

"true"})

2547

3259

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

2548

3260

def GetAllClients(self):

2549

3261

"D-Bus method"

2550

return dbus.Array(c.dbus_object_path

2551

for c in

2552

tcp_server.clients.itervalues())

3262

return dbus.Array(c.dbus_object_path for c in

3263

tcp_server.clients.values())

2553

3264

3265

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

3266

"true"})

2554

3267

@dbus.service.method(_interface,

2555

3268

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

2556

3269

def GetAllClientsWithProperties(self):

2557

3270

"D-Bus method"

2558

3271

return dbus.Dictionary(

2559

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

2560

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

3272

{ c.dbus_object_path: c.GetAll(

3273

"se.recompile.Mandos.Client")

3274

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

2561

3275

signature="oa{sv}")

2562

3276

2563

3277

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

2564

3278

def RemoveClient(self, object_path):

2565

3279

"D-Bus method"

2566

for c in tcp_server.clients.itervalues():

3280

for c in tcp_server.clients.values():

2567

3281

if c.dbus_object_path == object_path:

2568

3282

del tcp_server.clients[c.name]

2569

3283

c.remove_from_connection()

2570

# Don't signal anything except ClientRemoved

3284

# Don't signal the disabling

2571

3285

c.disable(quiet=True)

2572

# Emit D-Bus signal

2573

self.ClientRemoved(object_path, c.name)

3286

# Emit D-Bus signal for removal

3287

self.client_removed_signal(c)

2574

3288

return

2575

3289

raise KeyError(object_path)

2576

3290

2577

3291

del _interface

3292

3293

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3294

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

3295

def GetManagedObjects(self):

3296

"""D-Bus method"""

3297

return dbus.Dictionary(

3298

{ client.dbus_object_path:

3299

dbus.Dictionary(

3300

{ interface: client.GetAll(interface)

3301

for interface in

3302

client._get_all_interface_names()})

3303

for client in tcp_server.clients.values()})

3304

3305

def client_added_signal(self, client):

3306

"""Send the new standard signal and the old signal"""

3307

if use_dbus:

3308

# New standard signal

3309

self.InterfacesAdded(

3310

client.dbus_object_path,

3311

dbus.Dictionary(

3312

{ interface: client.GetAll(interface)

3313

for interface in

3314

client._get_all_interface_names()}))

3315

# Old signal

3316

self.ClientAdded(client.dbus_object_path)

3317

3318

def client_removed_signal(self, client):

3319

"""Send the new standard signal and the old signal"""

3320

if use_dbus:

3321

# New standard signal

3322

self.InterfacesRemoved(

3323

client.dbus_object_path,

3324

client._get_all_interface_names())

3325

# Old signal

3326

self.ClientRemoved(client.dbus_object_path,

3327

client.name)

2578

3328

2579

3329

mandos_dbus_service = MandosDBusService()

2580

3330

3331

# Save modules to variables to exempt the modules from being

3332

# unloaded before the function registered with atexit() is run.

3333

mp = multiprocessing

3334

wn = wnull

2581

3335

def cleanup():

2582

3336

"Cleanup function; run on exit"

2583

service.cleanup()

3337

if zeroconf:

3338

service.cleanup()

2584

3339

2585

multiprocessing.active_children()

3340

mp.active_children()

3341

wn.close()

2586

3342

if not (tcp_server.clients or client_settings):

2587

3343

return

2588

3344

2591

3347

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

2592

3348

clients = {}

2593

3349

with PGPEngine() as pgp:

2594

for client in tcp_server.clients.itervalues():

3350

for client in tcp_server.clients.values():

2595

3351

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

2596

3352

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

2597

3353

key)

2599

3355

2600

3356

# A list of attributes that can not be pickled

2601

3357

# + secret.

2602

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

2603

"checker"))

2604

for name, typ in (inspect.getmembers

2605

(dbus.service.Object)):

3358

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

3359

"checker", "server_settings" }

3360

for name, typ in inspect.getmembers(dbus.service

3361

.Object):

2606

3362

exclude.add(name)

2607

3363

2608

3364

client_dict["encrypted_secret"] = (client

2615

3371

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

2616

3372

2617

3373

try:

2618

with (tempfile.NamedTemporaryFile

2619

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

2620

dir=os.path.dirname(stored_state_path),

2621

delete=False)) as stored_state:

2622

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

2623

tempname=stored_state.name

3374

with tempfile.NamedTemporaryFile(

3375

mode='wb',

3376

suffix=".pickle",

3377

prefix='clients-',

3378

dir=os.path.dirname(stored_state_path),

3379

delete=False) as stored_state:

3380

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

3381

protocol = 2)

3382

tempname = stored_state.name

2624

3383

os.rename(tempname, stored_state_path)

2625

3384

except (IOError, OSError) as e:

2626

3385

if not debug:

2629

3388

except NameError:

2630

3389

pass

2631

3390

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

2632

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

3391

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

2633

3392

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

2634

3393

else:

2635

3394

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

2636

3395

exc_info=e)

2637

raise e

3396

raise

2638

3397

2639

3398

# Delete all clients, and settings from config

2640

3399

while tcp_server.clients:

2641

3400

name, client = tcp_server.clients.popitem()

2642

3401

if use_dbus:

2643

3402

client.remove_from_connection()

2644

# Don't signal anything except ClientRemoved

3403

# Don't signal the disabling

2645

3404

client.disable(quiet=True)

3405

# Emit D-Bus signal for removal

2646

3406

if use_dbus:

2647

# Emit D-Bus signal

2648

mandos_dbus_service.ClientRemoved(client

2649

.dbus_object_path,

2650

client.name)

3407

mandos_dbus_service.client_removed_signal(client)

2651

3408

client_settings.clear()

2652

3409

2653

3410

atexit.register(cleanup)

2654

3411

2655

for client in tcp_server.clients.itervalues():

3412

for client in tcp_server.clients.values():

2656

3413

if use_dbus:

2657

# Emit D-Bus signal

2658

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3414

# Emit D-Bus signal for adding

3415

mandos_dbus_service.client_added_signal(client)

2659

3416

# Need to initiate checking of clients

2660

3417

if client.enabled:

2661

3418

client.init_checker()

2664

3421

tcp_server.server_activate()

2665

3422

2666

3423

# Find out what port we got

2667

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

3424

if zeroconf:

3425

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

2668

3426

if use_ipv6:

2669

3427

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

2670

3428

" flowinfo %d, scope_id %d",

2676

3434

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

2677

3435

2678

3436

try:

2679

# From the Avahi example code

2680

try:

2681

service.activate()

2682

except dbus.exceptions.DBusException as error:

2683

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

2684

cleanup()

2685

sys.exit(1)

2686

# End of Avahi example code

3437

if zeroconf:

3438

# From the Avahi example code

3439

try:

3440

service.activate()

3441

except dbus.exceptions.DBusException as error:

3442

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

3443

cleanup()

3444

sys.exit(1)

3445

# End of Avahi example code

2687

3446

2688

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

2689

lambda *args, **kwargs:

2690

(tcp_server.handle_request

2691

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

3447

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

3448

lambda *args, **kwargs:

3449

(tcp_server.handle_request

3450

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

2692

3451

2693

3452

logger.debug("Starting main loop")

2694

3453

main_loop.run()

2704

3463

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

2705

3464

cleanup()

2706

3465

3466

2707

3467

if __name__ == '__main__':

2708

3468

main()