/mandos/trunk : revision 237.7.1

1

#!/usr/bin/python3 -bI

2

# -*- mode: python; after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); coding: utf-8 -*-

3

#

1

#!/usr/bin/python

2

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

3

#

4

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

5

#

5

#

6

# This program is partly derived from an example program for an Avahi

7

# service publisher, downloaded from

8

# <http://avahi.org/wiki/PythonPublishExample>. This includes the

9

# methods "add", "remove", "server_state_changed",

10

# "entry_group_state_changed", "cleanup", and "activate" in the

11

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

12

#

12

#

13

# Everything else is

14

15

16

#

17

# This file is part of Mandos.

18

#

19

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

20

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

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

21

19

# the Free Software Foundation, either version 3 of the License, or

22

20

# (at your option) any later version.

23

21

#

24

# Mandos is distributed in the hope that it will be useful, but

25

# WITHOUT ANY WARRANTY; without even the implied warranty of

22

# This program is distributed in the hope that it will be useful,

23

# but WITHOUT ANY WARRANTY; without even the implied warranty of

26

24

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

27

25

# GNU General Public License for more details.

28

#

26

#

29

27

# You should have received a copy of the GNU General Public License

30

# along with Mandos. If not, see <http://www.gnu.org/licenses/>.

31

#

28

# along with this program. If not, see

29

# <http://www.gnu.org/licenses/>.

30

#

32

31

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

33

#

32

#

34

33

35

34

from __future__ import (division, absolute_import, print_function,

36

35

unicode_literals)

37

36

38

try:

39

from future_builtins import *

40

except ImportError:

41

pass

37

from future_builtins import *

42

38

43

try:

44

import SocketServer as socketserver

45

except ImportError:

46

import socketserver

39

import SocketServer as socketserver

47

40

import socket

48

41

import argparse

49

42

import datetime

50

43

import errno

51

try:

52

import ConfigParser as configparser

53

except ImportError:

54

import configparser

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

55

51

import sys

56

52

import re

57

53

import os

66

62

import struct

67

63

import fcntl

68

64

import functools

69

try:

70

import cPickle as pickle

71

except ImportError:

72

import pickle

65

import cPickle as pickle

73

66

import multiprocessing

74

67

import types

75

68

import binascii

76

69

import tempfile

77

70

import itertools

78

import collections

79

import codecs

80

import unittest

81

import random

82

71

83

72

import dbus

84

73

import dbus.service

85

import gi

86

from gi.repository import GLib

74

import gobject

75

import avahi

87

76

from dbus.mainloop.glib import DBusGMainLoop

88

77

import ctypes

89

78

import ctypes.util

90

79

import xml.dom.minidom

91

80

import inspect

92

93

if sys.version_info.major == 2:

94

__metaclass__ = type

95

str = unicode

96

97

# Show warnings by default

98

if not sys.warnoptions:

99

import warnings

100

warnings.simplefilter("default")

101

102

# Try to find the value of SO_BINDTODEVICE:

81

import GnuPGInterface

82

103

83

try:

104

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

105

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

106

84

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

107

85

except AttributeError:

108

86

try:

109

# This is where SO_BINDTODEVICE was up to and including Python

110

# 2.6, and also 3.2:

111

87

from IN import SO_BINDTODEVICE

112

88

except ImportError:

113

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

114

# Try running the C preprocessor:

115

try:

116

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

117

"/dev/stdin"],

118

stdin=subprocess.PIPE,

119

stdout=subprocess.PIPE)

120

stdout = cc.communicate(

121

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

122

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

123

except (OSError, ValueError, IndexError):

124

# No value found

125

SO_BINDTODEVICE = None

126

127

if sys.version_info < (3, 2):

128

configparser.Configparser = configparser.SafeConfigParser

129

130

version = "1.8.9"

89

SO_BINDTODEVICE = None

90

91

version = "1.5.3"

131

92

stored_state_file = "clients.pickle"

132

93

133

94

logger = logging.getLogger()

134

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

135

syslogger = None

95

syslogger = (logging.handlers.SysLogHandler

96

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

97

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

136

98

137

99

try:

138

if_nametoindex = ctypes.cdll.LoadLibrary(

139

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

100

if_nametoindex = (ctypes.cdll.LoadLibrary

101

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

102

.if_nametoindex)

140

103

except (OSError, AttributeError):

141

142

104

def if_nametoindex(interface):

143

105

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

144

106

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

145

107

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

146

108

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

147

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

148

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

109

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

110

interface))

111

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

112

ifreq[16:20])[0]

149

113

return interface_index

150

114

151

115

152

def copy_function(func):

153

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

154

if sys.version_info.major == 2:

155

return types.FunctionType(func.func_code,

156

func.func_globals,

157

func.func_name,

158

func.func_defaults,

159

func.func_closure)

160

else:

161

return types.FunctionType(func.__code__,

162

func.__globals__,

163

func.__name__,

164

func.__defaults__,

165

func.__closure__)

166

167

168

116

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

169

117

"""init logger and add loglevel"""

170

171

global syslogger

172

syslogger = (logging.handlers.SysLogHandler(

173

facility=logging.handlers.SysLogHandler.LOG_DAEMON,

174

address="/dev/log"))

118

175

119

syslogger.setFormatter(logging.Formatter

176

120

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

177

121

' %(message)s'))

178

122

logger.addHandler(syslogger)

179

123

180

124

if debug:

181

125

console = logging.StreamHandler()

182

126

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

192

136

pass

193

137

194

138

195

class PGPEngine:

139

class PGPEngine(object):

196

140

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

197

198

141

def __init__(self):

142

self.gnupg = GnuPGInterface.GnuPG()

199

143

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

200

self.gpg = "gpg"

201

try:

202

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

203

for line in output.splitlines():

204

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

205

if name == b"gpg":

206

self.gpg = path

207

break

208

except OSError as e:

209

if e.errno != errno.ENOENT:

210

raise

211

self.gnupgargs = ['--batch',

212

'--homedir', self.tempdir,

213

'--force-mdc',

214

'--quiet']

215

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

216

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

217

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

218

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'])

150

219

151

def __enter__(self):

220

152

return self

221

222

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

153

154

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

223

155

self._cleanup()

224

156

return False

225

157

226

158

def __del__(self):

227

159

self._cleanup()

228

160

229

161

def _cleanup(self):

230

162

if self.tempdir is not None:

231

163

# Delete contents of tempdir

232

164

for root, dirs, files in os.walk(self.tempdir,

233

topdown=False):

165

topdown = False):

234

166

for filename in files:

235

167

os.remove(os.path.join(root, filename))

236

168

for dirname in dirs:

238

170

# Remove tempdir

239

171

os.rmdir(self.tempdir)

240

172

self.tempdir = None

241

173

242

174

def password_encode(self, password):

243

175

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

244

176

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

245

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

246

if len(encoded) > 2048:

247

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

248

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

249

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

250

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

251

return encoded

252

177

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

178

253

179

def encrypt(self, data, password):

254

passphrase = self.password_encode(password)

255

with tempfile.NamedTemporaryFile(

256

dir=self.tempdir) as passfile:

257

passfile.write(passphrase)

258

passfile.flush()

259

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

260

'--passphrase-file',

261

passfile.name]

262

+ self.gnupgargs,

263

stdin=subprocess.PIPE,

264

stdout=subprocess.PIPE,

265

stderr=subprocess.PIPE)

266

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

267

if proc.returncode != 0:

268

raise PGPError(err)

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

269

194

return ciphertext

270

195

271

196

def decrypt(self, data, password):

272

passphrase = self.password_encode(password)

273

with tempfile.NamedTemporaryFile(

274

dir=self.tempdir) as passfile:

275

passfile.write(passphrase)

276

passfile.flush()

277

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

278

'--passphrase-file',

279

passfile.name]

280

+ self.gnupgargs,

281

stdin=subprocess.PIPE,

282

stdout=subprocess.PIPE,

283

stderr=subprocess.PIPE)

284

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

285

if proc.returncode != 0:

286

raise PGPError(err)

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

287

211

return decrypted_plaintext

288

212

289

213

290

# Pretend that we have an Avahi module

291

class avahi:

292

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

293

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

294

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

295

PROTO_INET = 0 # avahi-common/address.h

296

PROTO_INET6 = 1 # avahi-common/address.h

297

DBUS_NAME = "org.freedesktop.Avahi"

298

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

299

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

300

DBUS_PATH_SERVER = "/"

301

302

@staticmethod

303

def string_array_to_txt_array(t):

304

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

305

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

306

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

307

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

308

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

309

SERVER_INVALID = 0 # avahi-common/defs.h

310

SERVER_REGISTERING = 1 # avahi-common/defs.h

311

SERVER_RUNNING = 2 # avahi-common/defs.h

312

SERVER_COLLISION = 3 # avahi-common/defs.h

313

SERVER_FAILURE = 4 # avahi-common/defs.h

314

315

316

214

class AvahiError(Exception):

317

215

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

318

216

self.value = value

319

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

320

**kwargs)

321

217

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

218

def __unicode__(self):

219

return unicode(repr(self.value))

322

220

323

221

class AvahiServiceError(AvahiError):

324

222

pass

325

223

326

327

224

class AvahiGroupError(AvahiError):

328

225

pass

329

226

330

227

331

class AvahiService:

228

class AvahiService(object):

332

229

"""An Avahi (Zeroconf) service.

333

230

334

231

Attributes:

335

232

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

336

233

Used to optionally bind to the specified interface.

337

234

name: string; Example: 'Mandos'

338

235

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

339

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

236

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

340

237

port: integer; what port to announce

341

238

TXT: list of strings; TXT record for the service

342

239

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

348

245

server: D-Bus Server

349

246

bus: dbus.SystemBus()

350

247

"""

351

352

def __init__(self,

353

interface=avahi.IF_UNSPEC,

354

name=None,

355

servicetype=None,

356

port=None,

357

TXT=None,

358

domain="",

359

host="",

360

max_renames=32768,

361

protocol=avahi.PROTO_UNSPEC,

362

bus=None):

248

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):

363

253

self.interface = interface

364

254

self.name = name

365

255

self.type = servicetype

374

264

self.server = None

375

265

self.bus = bus

376

266

self.entry_group_state_changed_match = None

377

378

def rename(self, remove=True):

267

268

def rename(self):

379

269

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

380

270

if self.rename_count >= self.max_renames:

381

271

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

382

272

" after %i retries, exiting.",

383

273

self.rename_count)

384

274

raise AvahiServiceError("Too many renames")

385

self.name = str(

386

self.server.GetAlternativeServiceName(self.name))

387

self.rename_count += 1

275

self.name = unicode(self.server

276

.GetAlternativeServiceName(self.name))

388

277

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

389

278

self.name)

390

if remove:

391

self.remove()

279

self.remove()

392

280

try:

393

281

self.add()

394

282

except dbus.exceptions.DBusException as error:

395

if (error.get_dbus_name()

396

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

397

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

398

return self.rename(remove=False)

399

else:

400

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

401

self.cleanup()

402

os._exit(1)

403

283

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

284

self.cleanup()

285

os._exit(1)

286

self.rename_count += 1

287

404

288

def remove(self):

405

289

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

406

290

if self.entry_group_state_changed_match is not None:

408

292

self.entry_group_state_changed_match = None

409

293

if self.group is not None:

410

294

self.group.Reset()

411

295

412

296

def add(self):

413

297

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

414

298

self.remove()

431

315

dbus.UInt16(self.port),

432

316

avahi.string_array_to_txt_array(self.TXT))

433

317

self.group.Commit()

434

318

435

319

def entry_group_state_changed(self, state, error):

436

320

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

437

321

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

438

322

439

323

if state == avahi.ENTRY_GROUP_ESTABLISHED:

440

324

logger.debug("Zeroconf service established.")

441

325

elif state == avahi.ENTRY_GROUP_COLLISION:

443

327

self.rename()

444

328

elif state == avahi.ENTRY_GROUP_FAILURE:

445

329

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

446

str(error))

447

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

448

330

unicode(error))

331

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

332

.format(error))

333

449

334

def cleanup(self):

450

335

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

451

336

if self.group is not None:

456

341

pass

457

342

self.group = None

458

343

self.remove()

459

344

460

345

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

461

346

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

462

347

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

463

bad_states = {

464

avahi.SERVER_INVALID: "Zeroconf server invalid",

465

avahi.SERVER_REGISTERING: None,

466

avahi.SERVER_COLLISION: "Zeroconf server name collision",

467

avahi.SERVER_FAILURE: "Zeroconf server failure",

468

}

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" }

469

355

if state in bad_states:

470

356

if bad_states[state] is not None:

471

357

if error is None:

474

360

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

475

361

self.cleanup()

476

362

elif state == avahi.SERVER_RUNNING:

477

try:

478

self.add()

479

except dbus.exceptions.DBusException as error:

480

if (error.get_dbus_name()

481

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

482

logger.info("Local Zeroconf service name"

483

" collision.")

484

return self.rename(remove=False)

485

else:

486

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

487

self.cleanup()

488

os._exit(1)

363

self.add()

489

364

else:

490

365

if error is None:

491

366

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

492

367

else:

493

368

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

494

369

495

370

def activate(self):

496

371

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

497

372

if self.server is None:

501

376

follow_name_owner_changes=True),

502

377

avahi.DBUS_INTERFACE_SERVER)

503

378

self.server.connect_to_signal("StateChanged",

504

self.server_state_changed)

379

self.server_state_changed)

505

380

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

506

381

507

382

508

383

class AvahiServiceToSyslog(AvahiService):

509

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

384

def rename(self):

510

385

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

511

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

512

syslogger.setFormatter(logging.Formatter(

513

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

514

.format(self.name)))

386

ret = AvahiService.rename(self)

387

syslogger.setFormatter(logging.Formatter

388

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

389

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

390

.format(self.name)))

515

391

return ret

516

392

517

393

518

# Pretend that we have a GnuTLS module

519

class gnutls:

520

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

521

522

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

523

if library is None:

524

library = ctypes.util.find_library("gnutls-deb0")

525

_library = ctypes.cdll.LoadLibrary(library)

526

del library

527

528

# Unless otherwise indicated, the constants and types below are

529

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

530

531

# Constants

532

E_SUCCESS = 0

533

E_INTERRUPTED = -52

534

E_AGAIN = -28

535

CRT_OPENPGP = 2

536

CRT_RAWPK = 3

537

CLIENT = 2

538

SHUT_RDWR = 0

539

CRD_CERTIFICATE = 1

540

E_NO_CERTIFICATE_FOUND = -49

541

X509_FMT_DER = 0

542

NO_TICKETS = 1<<10

543

ENABLE_RAWPK = 1<<18

544

CTYPE_PEERS = 3

545

KEYID_USE_SHA256 = 1 # gnutls/x509.h

546

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

547

548

# Types

549

class session_int(ctypes.Structure):

550

_fields_ = []

551

session_t = ctypes.POINTER(session_int)

552

553

class certificate_credentials_st(ctypes.Structure):

554

_fields_ = []

555

certificate_credentials_t = ctypes.POINTER(

556

certificate_credentials_st)

557

certificate_type_t = ctypes.c_int

558

559

class datum_t(ctypes.Structure):

560

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

561

('size', ctypes.c_uint)]

562

563

class openpgp_crt_int(ctypes.Structure):

564

_fields_ = []

565

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

566

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

567

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

568

credentials_type_t = ctypes.c_int

569

transport_ptr_t = ctypes.c_void_p

570

close_request_t = ctypes.c_int

571

572

# Exceptions

573

class Error(Exception):

574

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

575

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

576

# code is passed, convert it to a string with

577

# gnutls.strerror()

578

self.code = code

579

if message is None and code is not None:

580

message = gnutls.strerror(code)

581

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

582

message, *args)

583

584

class CertificateSecurityError(Error):

585

pass

586

587

# Classes

588

class Credentials:

589

def __init__(self):

590

self._c_object = gnutls.certificate_credentials_t()

591

gnutls.certificate_allocate_credentials(

592

ctypes.byref(self._c_object))

593

self.type = gnutls.CRD_CERTIFICATE

594

595

def __del__(self):

596

gnutls.certificate_free_credentials(self._c_object)

597

598

class ClientSession:

599

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

600

self._c_object = gnutls.session_t()

601

gnutls_flags = gnutls.CLIENT

602

if gnutls.check_version(b"3.5.6"):

603

gnutls_flags |= gnutls.NO_TICKETS

604

if gnutls.has_rawpk:

605

gnutls_flags |= gnutls.ENABLE_RAWPK

606

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

607

del gnutls_flags

608

gnutls.set_default_priority(self._c_object)

609

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

610

gnutls.handshake_set_private_extensions(self._c_object,

611

True)

612

self.socket = socket

613

if credentials is None:

614

credentials = gnutls.Credentials()

615

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

616

ctypes.cast(credentials._c_object,

617

ctypes.c_void_p))

618

self.credentials = credentials

619

620

def __del__(self):

621

gnutls.deinit(self._c_object)

622

623

def handshake(self):

624

return gnutls.handshake(self._c_object)

625

626

def send(self, data):

627

data = bytes(data)

628

data_len = len(data)

629

while data_len > 0:

630

data_len -= gnutls.record_send(self._c_object,

631

data[-data_len:],

632

data_len)

633

634

def bye(self):

635

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

636

637

# Error handling functions

638

def _error_code(result):

639

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

640

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

641

if result >= 0:

642

return result

643

if result == gnutls.E_NO_CERTIFICATE_FOUND:

644

raise gnutls.CertificateSecurityError(code=result)

645

raise gnutls.Error(code=result)

646

647

def _retry_on_error(result, func, arguments):

648

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

649

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

650

while result < 0:

651

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

652

return _error_code(result)

653

result = func(*arguments)

654

return result

655

656

# Unless otherwise indicated, the function declarations below are

657

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

658

659

# Functions

660

priority_set_direct = _library.gnutls_priority_set_direct

661

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

662

ctypes.POINTER(ctypes.c_char_p)]

663

priority_set_direct.restype = _error_code

664

665

init = _library.gnutls_init

666

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

667

init.restype = _error_code

668

669

set_default_priority = _library.gnutls_set_default_priority

670

set_default_priority.argtypes = [session_t]

671

set_default_priority.restype = _error_code

672

673

record_send = _library.gnutls_record_send

674

record_send.argtypes = [session_t, ctypes.c_void_p,

675

ctypes.c_size_t]

676

record_send.restype = ctypes.c_ssize_t

677

record_send.errcheck = _retry_on_error

678

679

certificate_allocate_credentials = (

680

_library.gnutls_certificate_allocate_credentials)

681

certificate_allocate_credentials.argtypes = [

682

ctypes.POINTER(certificate_credentials_t)]

683

certificate_allocate_credentials.restype = _error_code

684

685

certificate_free_credentials = (

686

_library.gnutls_certificate_free_credentials)

687

certificate_free_credentials.argtypes = [

688

certificate_credentials_t]

689

certificate_free_credentials.restype = None

690

691

handshake_set_private_extensions = (

692

_library.gnutls_handshake_set_private_extensions)

693

handshake_set_private_extensions.argtypes = [session_t,

694

ctypes.c_int]

695

handshake_set_private_extensions.restype = None

696

697

credentials_set = _library.gnutls_credentials_set

698

credentials_set.argtypes = [session_t, credentials_type_t,

699

ctypes.c_void_p]

700

credentials_set.restype = _error_code

701

702

strerror = _library.gnutls_strerror

703

strerror.argtypes = [ctypes.c_int]

704

strerror.restype = ctypes.c_char_p

705

706

certificate_type_get = _library.gnutls_certificate_type_get

707

certificate_type_get.argtypes = [session_t]

708

certificate_type_get.restype = _error_code

709

710

certificate_get_peers = _library.gnutls_certificate_get_peers

711

certificate_get_peers.argtypes = [session_t,

712

ctypes.POINTER(ctypes.c_uint)]

713

certificate_get_peers.restype = ctypes.POINTER(datum_t)

714

715

global_set_log_level = _library.gnutls_global_set_log_level

716

global_set_log_level.argtypes = [ctypes.c_int]

717

global_set_log_level.restype = None

718

719

global_set_log_function = _library.gnutls_global_set_log_function

720

global_set_log_function.argtypes = [log_func]

721

global_set_log_function.restype = None

722

723

deinit = _library.gnutls_deinit

724

deinit.argtypes = [session_t]

725

deinit.restype = None

726

727

handshake = _library.gnutls_handshake

728

handshake.argtypes = [session_t]

729

handshake.restype = _error_code

730

handshake.errcheck = _retry_on_error

731

732

transport_set_ptr = _library.gnutls_transport_set_ptr

733

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

734

transport_set_ptr.restype = None

735

736

bye = _library.gnutls_bye

737

bye.argtypes = [session_t, close_request_t]

738

bye.restype = _error_code

739

bye.errcheck = _retry_on_error

740

741

check_version = _library.gnutls_check_version

742

check_version.argtypes = [ctypes.c_char_p]

743

check_version.restype = ctypes.c_char_p

744

745

_need_version = b"3.3.0"

746

if check_version(_need_version) is None:

747

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

748

.format(_need_version))

749

750

_tls_rawpk_version = b"3.6.6"

751

has_rawpk = bool(check_version(_tls_rawpk_version))

752

753

if has_rawpk:

754

# Types

755

class pubkey_st(ctypes.Structure):

756

_fields = []

757

pubkey_t = ctypes.POINTER(pubkey_st)

758

759

x509_crt_fmt_t = ctypes.c_int

760

761

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

762

pubkey_init = _library.gnutls_pubkey_init

763

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

764

pubkey_init.restype = _error_code

765

766

pubkey_import = _library.gnutls_pubkey_import

767

pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),

768

x509_crt_fmt_t]

769

pubkey_import.restype = _error_code

770

771

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

772

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

773

ctypes.POINTER(ctypes.c_ubyte),

774

ctypes.POINTER(ctypes.c_size_t)]

775

pubkey_get_key_id.restype = _error_code

776

777

pubkey_deinit = _library.gnutls_pubkey_deinit

778

pubkey_deinit.argtypes = [pubkey_t]

779

pubkey_deinit.restype = None

780

else:

781

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

782

783

openpgp_crt_init = _library.gnutls_openpgp_crt_init

784

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

785

openpgp_crt_init.restype = _error_code

786

787

openpgp_crt_import = _library.gnutls_openpgp_crt_import

788

openpgp_crt_import.argtypes = [openpgp_crt_t,

789

ctypes.POINTER(datum_t),

790

openpgp_crt_fmt_t]

791

openpgp_crt_import.restype = _error_code

792

793

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

794

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

795

ctypes.POINTER(ctypes.c_uint)]

796

openpgp_crt_verify_self.restype = _error_code

797

798

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

799

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

800

openpgp_crt_deinit.restype = None

801

802

openpgp_crt_get_fingerprint = (

803

_library.gnutls_openpgp_crt_get_fingerprint)

804

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

805

ctypes.c_void_p,

806

ctypes.POINTER(

807

ctypes.c_size_t)]

808

openpgp_crt_get_fingerprint.restype = _error_code

809

810

if check_version(b"3.6.4"):

811

certificate_type_get2 = _library.gnutls_certificate_type_get2

812

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

813

certificate_type_get2.restype = _error_code

814

815

# Remove non-public functions

816

del _error_code, _retry_on_error

817

818

819

def call_pipe(connection, # : multiprocessing.Connection

820

func, *args, **kwargs):

821

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

822

823

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

824

return value on the provided multiprocessing.Connection.

825

"""

826

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

827

connection.close()

828

829

830

class Client:

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

400

401

class Client(object):

831

402

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

832

403

833

404

Attributes:

834

405

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

835

406

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

836

407

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

837

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

838

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

839

running.

840

checker_callback_tag: a GLib event source tag, or None

408

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

409

to see if the client lives.

410

'None' if no process is running.

411

checker_callback_tag: a gobject event source tag, or None

841

412

checker_command: string; External command which is run to check

842

413

if client lives. %() expansions are done at

843

414

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

844

415

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

845

checker_initiator_tag: a GLib event source tag, or None

416

checker_initiator_tag: a gobject event source tag, or None

846

417

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

847

418

client_structure: Object describing what attributes a client has

848

419

and is used for storing the client at exit

849

420

current_checker_command: string; current running checker_command

850

disable_initiator_tag: a GLib event source tag, or None

421

disable_initiator_tag: a gobject event source tag, or None

851

422

enabled: bool()

852

423

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

853

uniquely identify an OpenPGP client

854

key_id: string (64 hexadecimal digits); used to uniquely identify

855

a client using raw public keys

424

uniquely identify the client

856

425

host: string; available for use by the checker command

857

426

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

858

427

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

860

429

last_checker_status: integer between 0 and 255 reflecting exit

861

430

status of last checker. -1 reflects crashed

862

431

checker, -2 means no checker completed yet.

863

last_checker_signal: The signal which killed the last checker, if

864

last_checker_status is -1

865

432

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

866

433

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

867

434

D-Bus identifiers

872

439

runtime_expansions: Allowed attributes for runtime expansion.

873

440

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

874

441

disabled, or None

875

server_settings: The server_settings dict from main()

876

442

"""

877

443

878

444

runtime_expansions = ("approval_delay", "approval_duration",

879

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

445

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

880

446

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

881

447

"last_approval_request", "last_checked_ok",

882

448

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

883

client_defaults = {

884

"timeout": "PT5M",

885

"extended_timeout": "PT15M",

886

"interval": "PT2M",

887

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

888

"host": "",

889

"approval_delay": "PT0S",

890

"approval_duration": "PT1S",

891

"approved_by_default": "True",

892

"enabled": "True",

893

}

894

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)

474

895

475

@staticmethod

896

476

def config_parser(config):

897

477

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

904

484

for client_name in config.sections():

905

485

section = dict(config.items(client_name))

906

486

client = settings[client_name] = {}

907

487

908

488

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

909

489

# Reformat values from string types to Python types

910

490

client["approved_by_default"] = config.getboolean(

911

491

client_name, "approved_by_default")

912

492

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

913

493

"enabled")

914

915

# Uppercase and remove spaces from key_id and fingerprint

916

# for later comparison purposes with return value from the

917

# key_id() and fingerprint() functions

918

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

919

.replace(" ", ""))

494

920

495

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

921

496

.replace(" ", ""))

922

497

if "secret" in section:

923

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

924

.encode("utf-8"),

925

"base64")

498

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

926

499

elif "secfile" in section:

927

500

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

928

501

(section["secfile"])),

929

502

"rb") as secfile:

930

503

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

931

504

else:

932

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

505

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

933

506

.format(section))

934

507

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

935

508

client["extended_timeout"] = string_to_delta(

943

516

client["last_approval_request"] = None

944

517

client["last_checked_ok"] = None

945

518

client["last_checker_status"] = -2

946

519

947

520

return settings

948

949

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

521

522

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

950

523

self.name = name

951

if server_settings is None:

952

server_settings = {}

953

self.server_settings = server_settings

954

524

# adding all client settings

955

for setting, value in settings.items():

525

for setting, value in settings.iteritems():

956

526

setattr(self, setting, value)

957

527

958

528

if self.enabled:

959

529

if not hasattr(self, "last_enabled"):

960

530

self.last_enabled = datetime.datetime.utcnow()

964

534

else:

965

535

self.last_enabled = None

966

536

self.expires = None

967

537

968

538

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

969

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

539

# Uppercase and remove spaces from fingerprint for later

540

# comparison purposes with return value from the fingerprint()

541

# function

970

542

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

971

543

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

972

544

datetime.datetime.utcnow())

973

545

974

546

# attributes specific for this server instance

975

547

self.checker = None

976

548

self.checker_initiator_tag = None

979

551

self.current_checker_command = None

980

552

self.approved = None

981

553

self.approvals_pending = 0

982

self.changedstate = multiprocessing_manager.Condition(

983

multiprocessing_manager.Lock())

984

self.client_structure = [attr

985

for attr in self.__dict__.keys()

554

self.changedstate = (multiprocessing_manager

555

.Condition(multiprocessing_manager

556

.Lock()))

557

self.client_structure = [attr for attr in

558

self.__dict__.iterkeys()

986

559

if not attr.startswith("_")]

987

560

self.client_structure.append("client_structure")

988

989

for name, t in inspect.getmembers(

990

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

561

562

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

563

lambda obj:

564

isinstance(obj,

565

property)):

991

566

if not name.startswith("_"):

992

567

self.client_structure.append(name)

993

568

994

569

# Send notice to process children that client state has changed

995

570

def send_changedstate(self):

996

571

with self.changedstate:

997

572

self.changedstate.notify_all()

998

573

999

574

def enable(self):

1000

575

"""Start this client's checker and timeout hooks"""

1001

576

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

1006

581

self.last_enabled = datetime.datetime.utcnow()

1007

582

self.init_checker()

1008

583

self.send_changedstate()

1009

584

1010

585

def disable(self, quiet=True):

1011

586

"""Disable this client."""

1012

587

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

1014

589

if not quiet:

1015

590

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

1016

591

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

1017

GLib.source_remove(self.disable_initiator_tag)

592

gobject.source_remove(self.disable_initiator_tag)

1018

593

self.disable_initiator_tag = None

1019

594

self.expires = None

1020

595

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

1021

GLib.source_remove(self.checker_initiator_tag)

596

gobject.source_remove(self.checker_initiator_tag)

1022

597

self.checker_initiator_tag = None

1023

598

self.stop_checker()

1024

599

self.enabled = False

1025

600

if not quiet:

1026

601

self.send_changedstate()

1027

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

602

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

1028

603

return False

1029

604

1030

605

def __del__(self):

1031

606

self.disable()

1032

607

1033

608

def init_checker(self):

1034

609

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

1035

610

# and every interval from then on.

1036

611

if self.checker_initiator_tag is not None:

1037

GLib.source_remove(self.checker_initiator_tag)

1038

self.checker_initiator_tag = GLib.timeout_add(

1039

random.randrange(int(self.interval.total_seconds() * 1000

1040

+ 1)),

1041

self.start_checker)

612

gobject.source_remove(self.checker_initiator_tag)

613

self.checker_initiator_tag = (gobject.timeout_add

614

(self.interval_milliseconds(),

615

self.start_checker))

1042

616

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

1043

617

if self.disable_initiator_tag is not None:

1044

GLib.source_remove(self.disable_initiator_tag)

1045

self.disable_initiator_tag = GLib.timeout_add(

1046

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

618

gobject.source_remove(self.disable_initiator_tag)

619

self.disable_initiator_tag = (gobject.timeout_add

620

(self.timeout_milliseconds(),

621

self.disable))

1047

622

# Also start a new checker *right now*.

1048

623

self.start_checker()

1049

1050

def checker_callback(self, source, condition, connection,

1051

command):

624

625

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

1052

626

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

1053

# Read return code from connection (see call_pipe)

1054

returncode = connection.recv()

1055

connection.close()

1056

if self.checker is not None:

1057

self.checker.join()

1058

627

self.checker_callback_tag = None

1059

628

self.checker = None

1060

1061

if returncode >= 0:

1062

self.last_checker_status = returncode

1063

self.last_checker_signal = None

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

1064

631

if self.last_checker_status == 0:

1065

632

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

1066

633

vars(self))

1067

634

self.checked_ok()

1068

635

else:

1069

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

636

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

637

vars(self))

1070

638

else:

1071

639

self.last_checker_status = -1

1072

self.last_checker_signal = -returncode

1073

640

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

1074

641

vars(self))

1075

return False

1076

642

1077

643

def checked_ok(self):

1078

644

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

1079

645

self.last_checked_ok = datetime.datetime.utcnow()

1080

646

self.last_checker_status = 0

1081

self.last_checker_signal = None

1082

647

self.bump_timeout()

1083

648

1084

649

def bump_timeout(self, timeout=None):

1085

650

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

1086

651

if timeout is None:

1087

652

timeout = self.timeout

1088

653

if self.disable_initiator_tag is not None:

1089

GLib.source_remove(self.disable_initiator_tag)

654

gobject.source_remove(self.disable_initiator_tag)

1090

655

self.disable_initiator_tag = None

1091

656

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

1092

self.disable_initiator_tag = GLib.timeout_add(

1093

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(timedelta_to_milliseconds

659

(timeout), self.disable))

1094

660

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

1095

661

1096

662

def need_approval(self):

1097

663

self.last_approval_request = datetime.datetime.utcnow()

1098

664

1099

665

def start_checker(self):

1100

666

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

1101

667

1102

668

If a checker already exists, leave it running and do

1103

669

nothing."""

1104

670

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

1109

675

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

1110

676

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

1111

677

# should be.

1112

1113

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

1114

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

1115

self.checker.join()

1116

self.checker = None

678

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)

1117

692

# Start a new checker if needed

1118

693

if self.checker is None:

1119

694

# Escape attributes for the shell

1120

escaped_attrs = {

1121

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

1122

for attr in self.runtime_expansions}

695

escaped_attrs = dict(

696

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

697

for attr in

698

self.runtime_expansions)

1123

699

try:

1124

700

command = self.checker_command % escaped_attrs

1125

701

except TypeError as error:

1126

702

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

1127

self.checker_command,

703

self.checker_command, exc_info=error)

704

return True # Try again later

705

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",

1128

718

exc_info=error)

1129

return True # Try again later

1130

self.current_checker_command = command

1131

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

1132

self.name)

1133

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

1134

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

1135

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

1136

# always replaced by /dev/null.)

1137

# The exception is when not debugging but nevertheless

1138

# running in the foreground; use the previously

1139

# created wnull.

1140

popen_args = {"close_fds": True,

1141

"shell": True,

1142

"cwd": "/"}

1143

if (not self.server_settings["debug"]

1144

and self.server_settings["foreground"]):

1145

popen_args.update({"stdout": wnull,

1146

"stderr": wnull})

1147

pipe = multiprocessing.Pipe(duplex=False)

1148

self.checker = multiprocessing.Process(

1149

target=call_pipe,

1150

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

1151

kwargs=popen_args)

1152

self.checker.start()

1153

self.checker_callback_tag = GLib.io_add_watch(

1154

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

1155

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1156

self.checker_callback, pipe[0], command)

1157

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

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

1158

730

return True

1159

731

1160

732

def stop_checker(self):

1161

733

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

1162

734

if self.checker_callback_tag:

1163

GLib.source_remove(self.checker_callback_tag)

735

gobject.source_remove(self.checker_callback_tag)

1164

736

self.checker_callback_tag = None

1165

737

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

1166

738

return

1167

739

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

1168

self.checker.terminate()

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

1169

748

self.checker = None

1170

749

1171

750

1172

def dbus_service_property(dbus_interface,

1173

signature="v",

1174

access="readwrite",

1175

byte_arrays=False):

751

def dbus_service_property(dbus_interface, signature="v",

752

access="readwrite", byte_arrays=False):

1176

753

"""Decorators for marking methods of a DBusObjectWithProperties to

1177

754

become properties on the D-Bus.

1178

755

1179

756

The decorated method will be called with no arguments by "Get"

1180

757

and with one argument by "Set".

1181

758

1182

759

The parameters, where they are supported, are the same as

1183

760

dbus.service.method, except there is only "signature", since the

1184

761

type from Get() and the type sent to Set() is the same.

1187

764

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

1188

765

if byte_arrays and signature != "ay":

1189

766

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

1190

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

1191

767

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

1192

768

def decorator(func):

1193

769

func._dbus_is_property = True

1194

770

func._dbus_interface = dbus_interface

1197

773

func._dbus_name = func.__name__

1198

774

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

1199

775

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

1200

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

776

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1201

777

return func

1202

1203

778

return decorator

1204

779

1205

780

1206

781

def dbus_interface_annotations(dbus_interface):

1207

782

"""Decorator for marking functions returning interface annotations

1208

783

1209

784

Usage:

1210

785

1211

786

@dbus_interface_annotations("org.example.Interface")

1212

787

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

1213

788

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

1214

789

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

1215

790

"false"}

1216

791

"""

1217

1218

792

def decorator(func):

1219

793

func._dbus_is_interface = True

1220

794

func._dbus_interface = dbus_interface

1221

795

func._dbus_name = dbus_interface

1222

796

return func

1223

1224

797

return decorator

1225

798

1226

799

1227

800

def dbus_annotations(annotations):

1228

801

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

1229

802

Usage:

1230

1231

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

1232

"org.freedesktop.DBus.Property."

1233

"EmitsChangedSignal": "false"})

803

1234

804

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

1235

805

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

1236

809

def Property_dbus_property(self):

1237

810

return dbus.Boolean(False)

1238

1239

See also the DBusObjectWithAnnotations class.

1240

811

"""

1241

1242

812

def decorator(func):

1243

813

func._dbus_annotations = annotations

1244

814

return func

1245

1246

815

return decorator

1247

816

1248

817

1249

818

class DBusPropertyException(dbus.exceptions.DBusException):

1250

819

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

1251

820

"""

1252

pass

821

def __unicode__(self):

822

return unicode(str(self))

1253

823

1254

824

1255

825

class DBusPropertyAccessException(DBusPropertyException):

1264

834

pass

1265

835

1266

836

1267

class DBusObjectWithAnnotations(dbus.service.Object):

1268

"""A D-Bus object with annotations.

1269

1270

Classes inheriting from this can use the dbus_annotations

1271

decorator to add annotations to methods or signals.

837

class DBusObjectWithProperties(dbus.service.Object):

838

"""A D-Bus object with properties.

839

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.

1272

843

"""

1273

844

1274

845

@staticmethod

1275

846

def _is_dbus_thing(thing):

1276

847

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

1277

848

1278

849

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

1279

850

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

1280

851

"""

1281

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

852

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

1282

853

False)

1283

854

1284

855

def _get_all_dbus_things(self, thing):

1285

856

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

1286

857

"""

1287

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

858

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

859

name),

1288

860

athing.__get__(self))

1289

861

for cls in self.__class__.__mro__

1290

862

for name, athing in

1291

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

1292

1293

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1294

out_signature="s",

1295

path_keyword='object_path',

1296

connection_keyword='connection')

1297

def Introspect(self, object_path, connection):

1298

"""Overloading of standard D-Bus method.

1299

1300

Inserts annotation tags on methods and signals.

1301

"""

1302

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

1303

connection)

1304

try:

1305

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

1306

1307

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

1308

# Add annotation tags

1309

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

1310

for tag in if_tag.getElementsByTagName(typ):

1311

annots = dict()

1312

for name, prop in (self.

1313

_get_all_dbus_things(typ)):

1314

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

1315

and prop._dbus_interface

1316

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

1317

annots.update(getattr(

1318

prop, "_dbus_annotations", {}))

1319

for name, value in annots.items():

1320

ann_tag = document.createElement(

1321

"annotation")

1322

ann_tag.setAttribute("name", name)

1323

ann_tag.setAttribute("value", value)

1324

tag.appendChild(ann_tag)

1325

# Add interface annotation tags

1326

for annotation, value in dict(

1327

itertools.chain.from_iterable(

1328

annotations().items()

1329

for name, annotations

1330

in self._get_all_dbus_things("interface")

1331

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

1332

)).items():

1333

ann_tag = document.createElement("annotation")

1334

ann_tag.setAttribute("name", annotation)

1335

ann_tag.setAttribute("value", value)

1336

if_tag.appendChild(ann_tag)

1337

# Fix argument name for the Introspect method itself

1338

if (if_tag.getAttribute("name")

1339

== dbus.INTROSPECTABLE_IFACE):

1340

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

1341

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

1342

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

1343

if (arg.getAttribute("direction")

1344

== "out"):

1345

arg.setAttribute("name",

1346

"xml_data")

1347

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

1348

document.unlink()

1349

except (AttributeError, xml.dom.DOMException,

1350

xml.parsers.expat.ExpatError) as error:

1351

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

1352

exc_info=error)

1353

return xmlstring

1354

1355

1356

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1357

"""A D-Bus object with properties.

1358

1359

Classes inheriting from this can use the dbus_service_property

1360

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

1361

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

1362

"""

1363

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

865

1364

866

def _get_dbus_property(self, interface_name, property_name):

1365

867

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

1366

868

property with the specified name and interface.

1367

869

"""

1368

for cls in self.__class__.__mro__:

1369

for name, value in inspect.getmembers(

1370

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

870

for cls in self.__class__.__mro__:

871

for name, value in (inspect.getmembers

872

(cls,

873

self._is_dbus_thing("property"))):

1371

874

if (value._dbus_name == property_name

1372

875

and value._dbus_interface == interface_name):

1373

876

return value.__get__(self)

1374

877

1375

878

# No such property

1376

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

1377

self.dbus_object_path, interface_name, property_name))

1378

1379

@classmethod

1380

def _get_all_interface_names(cls):

1381

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

1382

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

1383

"_dbus_interface", None)

1384

for x in (inspect.getmro(cls))

1385

for attr in dir(x))

1386

if name is not None)

1387

1388

@dbus.service.method(dbus.PROPERTIES_IFACE,

1389

in_signature="ss",

879

raise DBusPropertyNotFound(self.dbus_object_path + ":"

880

+ interface_name + "."

881

+ property_name)

882

883

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

1390

884

out_signature="v")

1391

885

def Get(self, interface_name, property_name):

1392

886

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

1398

892

if not hasattr(value, "variant_level"):

1399

893

return value

1400

894

return type(value)(value, variant_level=value.variant_level+1)

1401

895

1402

896

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")

1403

897

def Set(self, interface_name, property_name, value):

1404

898

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

1410

904

# The byte_arrays option is not supported yet on

1411

905

# signatures other than "ay".

1412

906

if prop._dbus_signature != "ay":

1413

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

1414

"'ay' signature {!r}"

1415

.format(prop._dbus_signature))

1416

value = dbus.ByteArray(bytes(value))

907

raise ValueError

908

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

909

for byte in value))

1417

910

prop(value)

1418

1419

@dbus.service.method(dbus.PROPERTIES_IFACE,

1420

in_signature="s",

911

912

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

1421

913

out_signature="a{sv}")

1422

914

def GetAll(self, interface_name):

1423

915

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

1424

916

standard.

1425

917

1426

918

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

1427

919

"""

1428

920

properties = {}

1438

930

if not hasattr(value, "variant_level"):

1439

931

properties[name] = value

1440

932

continue

1441

properties[name] = type(value)(

1442

value, variant_level=value.variant_level + 1)

933

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

934

value.variant_level+1)

1443

935

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

1444

1445

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

1446

def PropertiesChanged(self, interface_name, changed_properties,

1447

invalidated_properties):

1448

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

1449

standard.

1450

"""

1451

pass

1452

936

1453

937

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1454

938

out_signature="s",

1455

939

path_keyword='object_path',

1456

940

connection_keyword='connection')

1457

941

def Introspect(self, object_path, connection):

1458

942

"""Overloading of standard D-Bus method.

1459

943

1460

944

Inserts property tags and interface annotation tags.

1461

945

"""

1462

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1463

object_path,

1464

connection)

946

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

947

connection)

1465

948

try:

1466

949

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

1467

1468

950

def make_tag(document, name, prop):

1469

951

e = document.createElement("property")

1470

952

e.setAttribute("name", name)

1471

953

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

1472

954

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

1473

955

return e

1474

1475

956

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

1476

957

# Add property tags

1477

958

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

1480

961

if prop._dbus_interface

1481

962

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

1482

963

if_tag.appendChild(tag)

1483

# Add annotation tags for properties

1484

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

1485

annots = dict()

1486

for name, prop in self._get_all_dbus_things(

1487

"property"):

1488

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

1489

and prop._dbus_interface

1490

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

1491

annots.update(getattr(

1492

prop, "_dbus_annotations", {}))

1493

for name, value in annots.items():

1494

ann_tag = document.createElement(

1495

"annotation")

1496

ann_tag.setAttribute("name", name)

1497

ann_tag.setAttribute("value", value)

1498

tag.appendChild(ann_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)

1499

995

# Add the names to the return values for the

1500

996

# "org.freedesktop.DBus.Properties" methods

1501

997

if (if_tag.getAttribute("name")

1520

1016

return xmlstring

1521

1017

1522

1018

1523

try:

1524

dbus.OBJECT_MANAGER_IFACE

1525

except AttributeError:

1526

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

1527

1528

1529

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1530

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

1531

1532

Classes inheriting from this exposes the standard

1533

GetManagedObjects call and the InterfacesAdded and

1534

InterfacesRemoved signals on the standard

1535

"org.freedesktop.DBus.ObjectManager" interface.

1536

1537

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

1538

manually.

1539

"""

1540

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1541

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

1542

def GetManagedObjects(self):

1543

"""This function must be overridden"""

1544

raise NotImplementedError()

1545

1546

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1547

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

1548

def InterfacesAdded(self, object_path, interfaces_and_properties):

1549

pass

1550

1551

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

1552

def InterfacesRemoved(self, object_path, interfaces):

1553

pass

1554

1555

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1556

out_signature="s",

1557

path_keyword='object_path',

1558

connection_keyword='connection')

1559

def Introspect(self, object_path, connection):

1560

"""Overloading of standard D-Bus method.

1561

1562

Override return argument name of GetManagedObjects to be

1563

"objpath_interfaces_and_properties"

1564

"""

1565

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1566

object_path,

1567

connection)

1568

try:

1569

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

1570

1571

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

1572

# Fix argument name for the GetManagedObjects method

1573

if (if_tag.getAttribute("name")

1574

== dbus.OBJECT_MANAGER_IFACE):

1575

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

1576

if (cn.getAttribute("name")

1577

== "GetManagedObjects"):

1578

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

1579

if (arg.getAttribute("direction")

1580

== "out"):

1581

arg.setAttribute(

1582

"name",

1583

"objpath_interfaces"

1584

"_and_properties")

1585

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

1586

document.unlink()

1587

except (AttributeError, xml.dom.DOMException,

1588

xml.parsers.expat.ExpatError) as error:

1589

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

1590

exc_info=error)

1591

return xmlstring

1592

1593

1594

def datetime_to_dbus(dt, variant_level=0):

1019

def datetime_to_dbus (dt, variant_level=0):

1595

1020

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

1596

1021

if dt is None:

1597

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

1598

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

1022

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

1023

return dbus.String(dt.isoformat(),

1024

variant_level=variant_level)

1599

1025

1600

1026

1601

1027

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1603

1029

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

1604

1030

interface names according to the "alt_interface_names" mapping.

1605

1031

Usage:

1606

1607

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

1608

"net.example.AlternateInterface"})

1032

1033

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

1034

"net.example.AlternateInterface"})

1609

1035

class SampleDBusObject(dbus.service.Object):

1610

1036

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

1611

1037

def SampleDBusMethod():

1612

1038

pass

1613

1039

1614

1040

The above "SampleDBusMethod" on "SampleDBusObject" will be

1615

1041

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

1616

1042

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

1617

1043

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

1618

1044

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

1619

1045

1620

1046

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

1621

1047

(from DBusObjectWithProperties) and interfaces (from the

1622

1048

dbus_interface_annotations decorator).

1623

1049

"""

1624

1625

1050

def wrapper(cls):

1626

1051

for orig_interface_name, alt_interface_name in (

1627

alt_interface_names.items()):

1052

alt_interface_names.iteritems()):

1628

1053

attr = {}

1629

1054

interface_names = set()

1630

1055

# Go though all attributes of the class

1632

1057

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

1633

1058

# with the wrong interface name

1634

1059

if (not hasattr(attribute, "_dbus_interface")

1635

or not attribute._dbus_interface.startswith(

1636

orig_interface_name)):

1060

or not attribute._dbus_interface

1061

.startswith(orig_interface_name)):

1637

1062

continue

1638

1063

# Create an alternate D-Bus interface name based on

1639

1064

# the current name

1640

alt_interface = attribute._dbus_interface.replace(

1641

orig_interface_name, alt_interface_name)

1065

alt_interface = (attribute._dbus_interface

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1642

1068

interface_names.add(alt_interface)

1643

1069

# Is this a D-Bus signal?

1644

1070

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

1645

# Extract the original non-method undecorated

1646

# function by black magic

1647

if sys.version_info.major == 2:

1648

nonmethod_func = (dict(

1071

# Extract the original non-method function by

1072

# black magic

1073

nonmethod_func = (dict(

1649

1074

zip(attribute.func_code.co_freevars,

1650

attribute.__closure__))

1651

["func"].cell_contents)

1652

else:

1653

nonmethod_func = (dict(

1654

zip(attribute.__code__.co_freevars,

1655

attribute.__closure__))

1656

["func"].cell_contents)

1075

attribute.__closure__))["func"]

1076

.cell_contents)

1657

1077

# Create a new, but exactly alike, function

1658

1078

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

1659

1079

# with the alternate D-Bus interface name

1660

new_function = copy_function(nonmethod_func)

1661

new_function = (dbus.service.signal(

1662

alt_interface,

1663

attribute._dbus_signature)(new_function))

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)))

1664

1089

# Copy annotations, if any

1665

1090

try:

1666

new_function._dbus_annotations = dict(

1667

attribute._dbus_annotations)

1091

new_function._dbus_annotations = (

1092

dict(attribute._dbus_annotations))

1668

1093

except AttributeError:

1669

1094

pass

1670

1671

1095

# Define a creator of a function to call both the

1672

1096

# original and alternate functions, so both the

1673

1097

# original and alternate signals gets sent when

1676

1100

"""This function is a scope container to pass

1677

1101

func1 and func2 to the "call_both" function

1678

1102

outside of its arguments"""

1679

1680

@functools.wraps(func2)

1681

1103

def call_both(*args, **kwargs):

1682

1104

"""This function will emit two D-Bus

1683

1105

signals by calling func1 and func2"""

1684

1106

func1(*args, **kwargs)

1685

1107

func2(*args, **kwargs)

1686

# Make wrapper function look like a D-Bus

1687

# signal

1688

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

1689

if name.startswith("_dbus_"):

1690

setattr(call_both, name, attr)

1691

1692

1108

return call_both

1693

1109

# Create the "call_both" function and add it to

1694

1110

# the class

1699

1115

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

1700

1116

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

1701

1117

# to the class.

1702

attr[attrname] = (

1703

dbus.service.method(

1704

alt_interface,

1705

attribute._dbus_in_signature,

1706

attribute._dbus_out_signature)

1707

(copy_function(attribute)))

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)))

1708

1128

# Copy annotations, if any

1709

1129

try:

1710

attr[attrname]._dbus_annotations = dict(

1711

attribute._dbus_annotations)

1130

attr[attrname]._dbus_annotations = (

1131

dict(attribute._dbus_annotations))

1712

1132

except AttributeError:

1713

1133

pass

1714

1134

# Is this a D-Bus property?

1717

1137

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

1718

1138

# property with the alternate D-Bus interface

1719

1139

# name. Add it to the class.

1720

attr[attrname] = (dbus_service_property(

1721

alt_interface, attribute._dbus_signature,

1722

attribute._dbus_access,

1723

attribute._dbus_get_args_options

1724

["byte_arrays"])

1725

(copy_function(attribute)))

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)))

1726

1153

# Copy annotations, if any

1727

1154

try:

1728

attr[attrname]._dbus_annotations = dict(

1729

attribute._dbus_annotations)

1155

attr[attrname]._dbus_annotations = (

1156

dict(attribute._dbus_annotations))

1730

1157

except AttributeError:

1731

1158

pass

1732

1159

# Is this a D-Bus interface?

1735

1162

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

1736

1163

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

1737

1164

# to the class.

1738

attr[attrname] = (

1739

dbus_interface_annotations(alt_interface)

1740

(copy_function(attribute)))

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)))

1741

1173

if deprecate:

1742

1174

# Deprecate all alternate interfaces

1743

iname = "_AlternateDBusNames_interface_annotation{}"

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1744

1176

for interface_name in interface_names:

1745

1746

1177

@dbus_interface_annotations(interface_name)

1747

1178

def func(self):

1748

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

1749

"true"}

1179

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

1180

"true" }

1750

1181

# Find an unused name

1751

1182

for aname in (iname.format(i)

1752

1183

for i in itertools.count()):

1756

1187

if interface_names:

1757

1188

# Replace the class with a new subclass of it with

1758

1189

# methods, signals, etc. as created above.

1759

if sys.version_info.major == 2:

1760

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

1761

(cls, ), attr)

1762

else:

1763

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

1764

(cls, ), attr)

1190

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

1191

(cls,), attr)

1765

1192

return cls

1766

1767

1193

return wrapper

1768

1194

1769

1195

1770

1196

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

1771

"se.bsnet.fukt.Mandos"})

1197

"se.bsnet.fukt.Mandos"})

1772

1198

class ClientDBus(Client, DBusObjectWithProperties):

1773

1199

"""A Client class using D-Bus

1774

1200

1775

1201

Attributes:

1776

1202

dbus_object_path: dbus.ObjectPath

1777

1203

bus: dbus.SystemBus()

1778

1204

"""

1779

1205

1780

1206

runtime_expansions = (Client.runtime_expansions

1781

+ ("dbus_object_path", ))

1782

1783

_interface = "se.recompile.Mandos.Client"

1784

1207

+ ("dbus_object_path",))

1208

1785

1209

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

1786

1787

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

1210

1211

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

1788

1212

self.bus = bus

1789

1213

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

1790

1214

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

1791

1215

# the D-Bus

1792

client_object_name = str(self.name).translate(

1216

client_object_name = unicode(self.name).translate(

1793

1217

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

1794

1218

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

1795

self.dbus_object_path = dbus.ObjectPath(

1796

"/clients/" + client_object_name)

1219

self.dbus_object_path = (dbus.ObjectPath

1220

("/clients/" + client_object_name))

1797

1221

DBusObjectWithProperties.__init__(self, self.bus,

1798

1222

self.dbus_object_path)

1799

1800

def notifychangeproperty(transform_func, dbus_name,

1801

type_func=lambda x: x,

1802

variant_level=1,

1803

invalidate_only=False,

1804

_interface=_interface):

1223

1224

def notifychangeproperty(transform_func,

1225

dbus_name, type_func=lambda x: x,

1226

variant_level=1):

1805

1227

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

1806

1228

its changes to DBus.

1807

1229

1808

1230

transform_fun: Function that takes a value and a variant_level

1809

1231

and transforms it to a D-Bus type.

1810

1232

dbus_name: D-Bus name of the variable

1812

1234

to the D-Bus. Default: no transform

1813

1235

variant_level: D-Bus variant level. Default: 1

1814

1236

"""

1815

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

1816

1237

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

1817

1238

def setter(self, value):

1818

1239

if hasattr(self, "dbus_object_path"):

1819

1240

if (not hasattr(self, attrname) or

1820

1241

type_func(getattr(self, attrname, None))

1821

1242

!= type_func(value)):

1822

if invalidate_only:

1823

self.PropertiesChanged(

1824

_interface, dbus.Dictionary(),

1825

dbus.Array((dbus_name, )))

1826

else:

1827

dbus_value = transform_func(

1828

type_func(value),

1829

variant_level=variant_level)

1830

self.PropertyChanged(dbus.String(dbus_name),

1831

dbus_value)

1832

self.PropertiesChanged(

1833

_interface,

1834

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

1835

dbus_value}),

1836

dbus.Array())

1243

dbus_value = transform_func(type_func(value),

1244

variant_level

1245

=variant_level)

1246

self.PropertyChanged(dbus.String(dbus_name),

1247

dbus_value)

1837

1248

setattr(self, attrname, value)

1838

1249

1839

1250

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

1840

1251

1841

1252

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1842

1253

approvals_pending = notifychangeproperty(dbus.Boolean,

1843

1254

"ApprovalPending",

1844

type_func=bool)

1255

type_func = bool)

1845

1256

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

1846

1257

last_enabled = notifychangeproperty(datetime_to_dbus,

1847

1258

"LastEnabled")

1848

checker = notifychangeproperty(

1849

dbus.Boolean, "CheckerRunning",

1850

type_func=lambda checker: checker is not None)

1259

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

1260

type_func = lambda checker:

1261

checker is not None)

1851

1262

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1852

1263

"LastCheckedOK")

1853

1264

last_checker_status = notifychangeproperty(dbus.Int16,

1856

1267

datetime_to_dbus, "LastApprovalRequest")

1857

1268

approved_by_default = notifychangeproperty(dbus.Boolean,

1858

1269

"ApprovedByDefault")

1859

approval_delay = notifychangeproperty(

1860

dbus.UInt64, "ApprovalDelay",

1861

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

1270

approval_delay = notifychangeproperty(dbus.UInt64,

1271

"ApprovalDelay",

1272

type_func =

1273

timedelta_to_milliseconds)

1862

1274

approval_duration = notifychangeproperty(

1863

1275

dbus.UInt64, "ApprovalDuration",

1864

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

1276

type_func = timedelta_to_milliseconds)

1865

1277

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

1866

timeout = notifychangeproperty(

1867

dbus.UInt64, "Timeout",

1868

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

1278

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

1279

type_func =

1280

timedelta_to_milliseconds)

1869

1281

extended_timeout = notifychangeproperty(

1870

1282

dbus.UInt64, "ExtendedTimeout",

1871

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

1872

interval = notifychangeproperty(

1873

dbus.UInt64, "Interval",

1874

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

1283

type_func = timedelta_to_milliseconds)

1284

interval = notifychangeproperty(dbus.UInt64,

1285

"Interval",

1286

type_func =

1287

timedelta_to_milliseconds)

1875

1288

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

1876

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

1877

invalidate_only=True)

1878

1289

1879

1290

del notifychangeproperty

1880

1291

1881

1292

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

1882

1293

try:

1883

1294

self.remove_from_connection()

1886

1297

if hasattr(DBusObjectWithProperties, "__del__"):

1887

1298

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

1888

1299

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

1889

1890

def checker_callback(self, source, condition,

1891

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

1892

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

1893

connection, command, *args,

1894

**kwargs)

1895

exitstatus = self.last_checker_status

1896

if exitstatus >= 0:

1300

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)

1897

1307

# Emit D-Bus signal

1898

1308

self.CheckerCompleted(dbus.Int16(exitstatus),

1899

# This is specific to GNU libC

1900

dbus.Int64(exitstatus << 8),

1309

dbus.Int64(condition),

1901

1310

dbus.String(command))

1902

1311

else:

1903

1312

# Emit D-Bus signal

1904

1313

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

1905

dbus.Int64(

1906

# This is specific to GNU libC

1907

(exitstatus << 8)

1908

| self.last_checker_signal),

1314

dbus.Int64(condition),

1909

1315

dbus.String(command))

1910

return ret

1911

1316

1317

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

1318

*args, **kwargs)

1319

1912

1320

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

1913

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

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

1914

1326

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

1915

1327

# Only if new checker process was started

1916

1328

if (self.checker is not None

1918

1330

# Emit D-Bus signal

1919

1331

self.CheckerStarted(self.current_checker_command)

1920

1332

return r

1921

1333

1922

1334

def _reset_approved(self):

1923

1335

self.approved = None

1924

1336

return False

1925

1337

1926

1338

def approve(self, value=True):

1927

1339

self.approved = value

1928

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

1929

* 1000), self._reset_approved)

1340

gobject.timeout_add(timedelta_to_milliseconds

1341

(self.approval_duration),

1342

self._reset_approved)

1930

1343

self.send_changedstate()

1931

1932

# D-Bus methods, signals & properties

1933

1934

# Interfaces

1935

1936

# Signals

1937

1344

1345

## D-Bus methods, signals & properties

1346

_interface = "se.recompile.Mandos.Client"

1347

1348

## Interfaces

1349

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1355

## Signals

1356

1938

1357

# CheckerCompleted - signal

1939

1358

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

1940

1359

def CheckerCompleted(self, exitcode, waitstatus, command):

1941

1360

"D-Bus signal"

1942

1361

pass

1943

1362

1944

1363

# CheckerStarted - signal

1945

1364

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

1946

1365

def CheckerStarted(self, command):

1947

1366

"D-Bus signal"

1948

1367

pass

1949

1368

1950

1369

# PropertyChanged - signal

1951

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

1952

1370

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

1953

1371

def PropertyChanged(self, property, value):

1954

1372

"D-Bus signal"

1955

1373

pass

1956

1374

1957

1375

# GotSecret - signal

1958

1376

@dbus.service.signal(_interface)

1959

1377

def GotSecret(self):

1962

1380

server to mandos-client

1963

1381

"""

1964

1382

pass

1965

1383

1966

1384

# Rejected - signal

1967

1385

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

1968

1386

def Rejected(self, reason):

1969

1387

"D-Bus signal"

1970

1388

pass

1971

1389

1972

1390

# NeedApproval - signal

1973

1391

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

1974

1392

def NeedApproval(self, timeout, default):

1975

1393

"D-Bus signal"

1976

1394

return self.need_approval()

1977

1978

# Methods

1979

1395

1396

## Methods

1397

1980

1398

# Approve - method

1981

1399

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

1982

1400

def Approve(self, value):

1983

1401

self.approve(value)

1984

1402

1985

1403

# CheckedOK - method

1986

1404

@dbus.service.method(_interface)

1987

1405

def CheckedOK(self):

1988

1406

self.checked_ok()

1989

1407

1990

1408

# Enable - method

1991

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

1992

1409

@dbus.service.method(_interface)

1993

1410

def Enable(self):

1994

1411

"D-Bus method"

1995

1412

self.enable()

1996

1413

1997

1414

# StartChecker - method

1998

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

1999

1415

@dbus.service.method(_interface)

2000

1416

def StartChecker(self):

2001

1417

"D-Bus method"

2002

1418

self.start_checker()

2003

1419

2004

1420

# Disable - method

2005

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

2006

1421

@dbus.service.method(_interface)

2007

1422

def Disable(self):

2008

1423

"D-Bus method"

2009

1424

self.disable()

2010

1425

2011

1426

# StopChecker - method

2012

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

2013

1427

@dbus.service.method(_interface)

2014

1428

def StopChecker(self):

2015

1429

self.stop_checker()

2016

2017

# Properties

2018

1430

1431

## Properties

1432

2019

1433

# ApprovalPending - property

2020

1434

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

2021

1435

def ApprovalPending_dbus_property(self):

2022

1436

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

2023

1437

2024

1438

# ApprovedByDefault - property

2025

@dbus_service_property(_interface,

2026

signature="b",

1439

@dbus_service_property(_interface, signature="b",

2027

1440

access="readwrite")

2028

1441

def ApprovedByDefault_dbus_property(self, value=None):

2029

1442

if value is None: # get

2030

1443

return dbus.Boolean(self.approved_by_default)

2031

1444

self.approved_by_default = bool(value)

2032

1445

2033

1446

# ApprovalDelay - property

2034

@dbus_service_property(_interface,

2035

signature="t",

1447

@dbus_service_property(_interface, signature="t",

2036

1448

access="readwrite")

2037

1449

def ApprovalDelay_dbus_property(self, value=None):

2038

1450

if value is None: # get

2039

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

2040

* 1000)

1451

return dbus.UInt64(self.approval_delay_milliseconds())

2041

1452

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

2042

1453

2043

1454

# ApprovalDuration - property

2044

@dbus_service_property(_interface,

2045

signature="t",

1455

@dbus_service_property(_interface, signature="t",

2046

1456

access="readwrite")

2047

1457

def ApprovalDuration_dbus_property(self, value=None):

2048

1458

if value is None: # get

2049

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

2050

* 1000)

1459

return dbus.UInt64(timedelta_to_milliseconds(

1460

self.approval_duration))

2051

1461

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

2052

1462

2053

1463

# Name - property

2054

@dbus_annotations(

2055

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

2056

1464

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

2057

1465

def Name_dbus_property(self):

2058

1466

return dbus.String(self.name)

2059

2060

# KeyID - property

2061

@dbus_annotations(

2062

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

2063

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

2064

def KeyID_dbus_property(self):

2065

return dbus.String(self.key_id)

2066

1467

2067

1468

# Fingerprint - property

2068

@dbus_annotations(

2069

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

2070

1469

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

2071

1470

def Fingerprint_dbus_property(self):

2072

1471

return dbus.String(self.fingerprint)

2073

1472

2074

1473

# Host - property

2075

@dbus_service_property(_interface,

2076

signature="s",

1474

@dbus_service_property(_interface, signature="s",

2077

1475

access="readwrite")

2078

1476

def Host_dbus_property(self, value=None):

2079

1477

if value is None: # get

2080

1478

return dbus.String(self.host)

2081

self.host = str(value)

2082

1479

self.host = unicode(value)

1480

2083

1481

# Created - property

2084

@dbus_annotations(

2085

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

2086

1482

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

2087

1483

def Created_dbus_property(self):

2088

1484

return datetime_to_dbus(self.created)

2089

1485

2090

1486

# LastEnabled - property

2091

1487

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

2092

1488

def LastEnabled_dbus_property(self):

2093

1489

return datetime_to_dbus(self.last_enabled)

2094

1490

2095

1491

# Enabled - property

2096

@dbus_service_property(_interface,

2097

signature="b",

1492

@dbus_service_property(_interface, signature="b",

2098

1493

access="readwrite")

2099

1494

def Enabled_dbus_property(self, value=None):

2100

1495

if value is None: # get

2103

1498

self.enable()

2104

1499

else:

2105

1500

self.disable()

2106

1501

2107

1502

# LastCheckedOK - property

2108

@dbus_service_property(_interface,

2109

signature="s",

1503

@dbus_service_property(_interface, signature="s",

2110

1504

access="readwrite")

2111

1505

def LastCheckedOK_dbus_property(self, value=None):

2112

1506

if value is not None:

2113

1507

self.checked_ok()

2114

1508

return

2115

1509

return datetime_to_dbus(self.last_checked_ok)

2116

1510

2117

1511

# LastCheckerStatus - property

2118

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

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

2119

1514

def LastCheckerStatus_dbus_property(self):

2120

1515

return dbus.Int16(self.last_checker_status)

2121

1516

2122

1517

# Expires - property

2123

1518

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

2124

1519

def Expires_dbus_property(self):

2125

1520

return datetime_to_dbus(self.expires)

2126

1521

2127

1522

# LastApprovalRequest - property

2128

1523

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

2129

1524

def LastApprovalRequest_dbus_property(self):

2130

1525

return datetime_to_dbus(self.last_approval_request)

2131

1526

2132

1527

# Timeout - property

2133

@dbus_service_property(_interface,

2134

signature="t",

1528

@dbus_service_property(_interface, signature="t",

2135

1529

access="readwrite")

2136

1530

def Timeout_dbus_property(self, value=None):

2137

1531

if value is None: # get

2138

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

1532

return dbus.UInt64(self.timeout_milliseconds())

2139

1533

old_timeout = self.timeout

2140

1534

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

2141

1535

# Reschedule disabling

2149

1543

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

2150

1544

is None):

2151

1545

return

2152

GLib.source_remove(self.disable_initiator_tag)

2153

self.disable_initiator_tag = GLib.timeout_add(

2154

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

2155

self.disable)

2156

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))

1551

2157

1552

# ExtendedTimeout - property

2158

@dbus_service_property(_interface,

2159

signature="t",

1553

@dbus_service_property(_interface, signature="t",

2160

1554

access="readwrite")

2161

1555

def ExtendedTimeout_dbus_property(self, value=None):

2162

1556

if value is None: # get

2163

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

2164

* 1000)

1557

return dbus.UInt64(self.extended_timeout_milliseconds())

2165

1558

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

2166

1559

2167

1560

# Interval - property

2168

@dbus_service_property(_interface,

2169

signature="t",

1561

@dbus_service_property(_interface, signature="t",

2170

1562

access="readwrite")

2171

1563

def Interval_dbus_property(self, value=None):

2172

1564

if value is None: # get

2173

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

1565

return dbus.UInt64(self.interval_milliseconds())

2174

1566

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

2175

1567

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

2176

1568

return

2177

1569

if self.enabled:

2178

1570

# Reschedule checker run

2179

GLib.source_remove(self.checker_initiator_tag)

2180

self.checker_initiator_tag = GLib.timeout_add(

2181

value, self.start_checker)

2182

self.start_checker() # Start one now, too

2183

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

1575

2184

1576

# Checker - property

2185

@dbus_service_property(_interface,

2186

signature="s",

1577

@dbus_service_property(_interface, signature="s",

2187

1578

access="readwrite")

2188

1579

def Checker_dbus_property(self, value=None):

2189

1580

if value is None: # get

2190

1581

return dbus.String(self.checker_command)

2191

self.checker_command = str(value)

2192

1582

self.checker_command = unicode(value)

1583

2193

1584

# CheckerRunning - property

2194

@dbus_service_property(_interface,

2195

signature="b",

1585

@dbus_service_property(_interface, signature="b",

2196

1586

access="readwrite")

2197

1587

def CheckerRunning_dbus_property(self, value=None):

2198

1588

if value is None: # get

2201

1591

self.start_checker()

2202

1592

else:

2203

1593

self.stop_checker()

2204

1594

2205

1595

# ObjectPath - property

2206

@dbus_annotations(

2207

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

2208

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

2209

1596

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

2210

1597

def ObjectPath_dbus_property(self):

2211

return self.dbus_object_path # is already a dbus.ObjectPath

2212

1598

return self.dbus_object_path # is already a dbus.ObjectPath

1599

2213

1600

# Secret = property

2214

@dbus_annotations(

2215

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

2216

"invalidates"})

2217

@dbus_service_property(_interface,

2218

signature="ay",

2219

access="write",

2220

byte_arrays=True)

1601

@dbus_service_property(_interface, signature="ay",

1602

access="write", byte_arrays=True)

2221

1603

def Secret_dbus_property(self, value):

2222

self.secret = bytes(value)

2223

1604

self.secret = str(value)

1605

2224

1606

del _interface

2225

1607

2226

1608

2227

class ProxyClient:

2228

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

1609

class ProxyClient(object):

1610

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

2229

1611

self._pipe = child_pipe

2230

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

1612

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

2231

1613

if not self._pipe.recv():

2232

raise KeyError(key_id or fpr)

2233

1614

raise KeyError()

1615

2234

1616

def __getattribute__(self, name):

2235

1617

if name == '_pipe':

2236

1618

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

2239

1621

if data[0] == 'data':

2240

1622

return data[1]

2241

1623

if data[0] == 'function':

2242

2243

1624

def func(*args, **kwargs):

2244

1625

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

2245

1626

return self._pipe.recv()[1]

2246

2247

1627

return func

2248

1628

2249

1629

def __setattr__(self, name, value):

2250

1630

if name == '_pipe':

2251

1631

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

2254

1634

2255

1635

class ClientHandler(socketserver.BaseRequestHandler, object):

2256

1636

"""A class to handle client connections.

2257

1637

2258

1638

Instantiated once for each connection to handle it.

2259

1639

Note: This will run in its own forked process."""

2260

1640

2261

1641

def handle(self):

2262

1642

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

2263

1643

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

2264

str(self.client_address))

1644

unicode(self.client_address))

2265

1645

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

2266

1646

self.server.child_pipe.fileno())

2267

2268

session = gnutls.ClientSession(self.request)

2269

2270

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

2271

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

2272

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

2273

# "+DHE-DSS"))

1647

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.

1657

1658

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

1659

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

1660

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

1661

# "+DHE-DSS"))

2274

1662

# Use a fallback default, since this MUST be set.

2275

1663

priority = self.server.gnutls_priority

2276

1664

if priority is None:

2277

1665

priority = "NORMAL"

2278

gnutls.priority_set_direct(session._c_object,

2279

priority.encode("utf-8"),

2280

None)

2281

1666

(gnutls.library.functions

1667

.gnutls_priority_set_direct(session._c_object,

1668

priority, None))

1669

2282

1670

# Start communication using the Mandos protocol

2283

1671

# Get protocol number

2284

1672

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

2285

1673

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

2286

1674

try:

2287

1675

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

2288

raise RuntimeError(line)

1676

raise RuntimeError

2289

1677

except (ValueError, IndexError, RuntimeError) as error:

2290

1678

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

2291

1679

return

2292

1680

2293

1681

# Start GnuTLS connection

2294

1682

try:

2295

1683

session.handshake()

2296

except gnutls.Error as error:

1684

except gnutls.errors.GNUTLSError as error:

2297

1685

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

2298

1686

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

2299

1687

# established. Just abandon the request.

2300

1688

return

2301

1689

logger.debug("Handshake succeeded")

2302

1690

2303

1691

approval_required = False

2304

1692

try:

2305

if gnutls.has_rawpk:

2306

fpr = b""

2307

try:

2308

key_id = self.key_id(

2309

self.peer_certificate(session))

2310

except (TypeError, gnutls.Error) as error:

2311

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

2312

return

2313

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

2314

2315

else:

2316

key_id = b""

2317

try:

2318

fpr = self.fingerprint(

2319

self.peer_certificate(session))

2320

except (TypeError, gnutls.Error) as error:

2321

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

2322

return

2323

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

2324

2325

try:

2326

client = ProxyClient(child_pipe, key_id, fpr,

1693

try:

1694

fpr = self.fingerprint(self.peer_certificate

1695

(session))

1696

except (TypeError,

1697

gnutls.errors.GNUTLSError) as error:

1698

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

1699

return

1700

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

1701

1702

try:

1703

client = ProxyClient(child_pipe, fpr,

2327

1704

self.client_address)

2328

1705

except KeyError:

2329

1706

return

2330

1707

2331

1708

if client.approval_delay:

2332

1709

delay = client.approval_delay

2333

1710

client.approvals_pending += 1

2334

1711

approval_required = True

2335

1712

2336

1713

while True:

2337

1714

if not client.enabled:

2338

1715

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

2339

client.name)

1716

client.name)

2340

1717

if self.server.use_dbus:

2341

1718

# Emit D-Bus signal

2342

1719

client.Rejected("Disabled")

2343

1720

return

2344

1721

2345

1722

if client.approved or not client.approval_delay:

2346

# We are approved or approval is disabled

1723

#We are approved or approval is disabled

2347

1724

break

2348

1725

elif client.approved is None:

2349

1726

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

2351

1728

if self.server.use_dbus:

2352

1729

# Emit D-Bus signal

2353

1730

client.NeedApproval(

2354

client.approval_delay.total_seconds()

2355

* 1000, client.approved_by_default)

1731

client.approval_delay_milliseconds(),

1732

client.approved_by_default)

2356

1733

else:

2357

1734

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

2358

1735

client.name)

2360

1737

# Emit D-Bus signal

2361

1738

client.Rejected("Denied")

2362

1739

return

2363

2364

# wait until timeout or approved

1740

1741

#wait until timeout or approved

2365

1742

time = datetime.datetime.now()

2366

1743

client.changedstate.acquire()

2367

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

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

2368

1747

client.changedstate.release()

2369

1748

time2 = datetime.datetime.now()

2370

1749

if (time2 - time) >= delay:

2380

1759

break

2381

1760

else:

2382

1761

delay -= time2 - time

2383

2384

try:

2385

session.send(client.secret)

2386

except gnutls.Error as error:

2387

logger.warning("gnutls send failed",

2388

exc_info=error)

2389

return

2390

1762

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

1775

2391

1776

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

2392

1777

# bump the timeout using extended_timeout

2393

1778

client.bump_timeout(client.extended_timeout)

2394

1779

if self.server.use_dbus:

2395

1780

# Emit D-Bus signal

2396

1781

client.GotSecret()

2397

1782

2398

1783

finally:

2399

1784

if approval_required:

2400

1785

client.approvals_pending -= 1

2401

1786

try:

2402

1787

session.bye()

2403

except gnutls.Error as error:

1788

except gnutls.errors.GNUTLSError as error:

2404

1789

logger.warning("GnuTLS bye failed",

2405

1790

exc_info=error)

2406

1791

2407

1792

@staticmethod

2408

1793

def peer_certificate(session):

2409

"Return the peer's certificate as a bytestring"

2410

try:

2411

cert_type = gnutls.certificate_type_get2(session._c_object,

2412

gnutls.CTYPE_PEERS)

2413

except AttributeError:

2414

cert_type = gnutls.certificate_type_get(session._c_object)

2415

if gnutls.has_rawpk:

2416

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2417

else:

2418

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2419

# If not a valid certificate type...

2420

if cert_type not in valid_cert_types:

2421

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

2422

valid_cert_types)

2423

# ...return invalid data

2424

return b""

1794

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

1795

# 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

2425

1801

list_size = ctypes.c_uint(1)

2426

cert_list = (gnutls.certificate_get_peers

1802

cert_list = (gnutls.library.functions

1803

.gnutls_certificate_get_peers

2427

1804

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

2428

1805

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

2429

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

1806

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

1807

" certificate")

2430

1808

if list_size.value == 0:

2431

1809

return None

2432

1810

cert = cert_list[0]

2433

1811

return ctypes.string_at(cert.data, cert.size)

2434

2435

@staticmethod

2436

def key_id(certificate):

2437

"Convert a certificate bytestring to a hexdigit key ID"

2438

# New GnuTLS "datum" with the public key

2439

datum = gnutls.datum_t(

2440

ctypes.cast(ctypes.c_char_p(certificate),

2441

ctypes.POINTER(ctypes.c_ubyte)),

2442

ctypes.c_uint(len(certificate)))

2443

# XXX all these need to be created in the gnutls "module"

2444

# New empty GnuTLS certificate

2445

pubkey = gnutls.pubkey_t()

2446

gnutls.pubkey_init(ctypes.byref(pubkey))

2447

# Import the raw public key into the certificate

2448

gnutls.pubkey_import(pubkey,

2449

ctypes.byref(datum),

2450

gnutls.X509_FMT_DER)

2451

# New buffer for the key ID

2452

buf = ctypes.create_string_buffer(32)

2453

buf_len = ctypes.c_size_t(len(buf))

2454

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

2455

gnutls.pubkey_get_key_id(pubkey,

2456

gnutls.KEYID_USE_SHA256,

2457

ctypes.cast(ctypes.byref(buf),

2458

ctypes.POINTER(ctypes.c_ubyte)),

2459

ctypes.byref(buf_len))

2460

# Deinit the certificate

2461

gnutls.pubkey_deinit(pubkey)

2462

2463

# Convert the buffer to a Python bytestring

2464

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

2465

# Convert the bytestring to hexadecimal notation

2466

hex_key_id = binascii.hexlify(key_id).upper()

2467

return hex_key_id

2468

1812

2469

1813

@staticmethod

2470

1814

def fingerprint(openpgp):

2471

1815

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2472

1816

# New GnuTLS "datum" with the OpenPGP public key

2473

datum = gnutls.datum_t(

2474

ctypes.cast(ctypes.c_char_p(openpgp),

2475

ctypes.POINTER(ctypes.c_ubyte)),

2476

ctypes.c_uint(len(openpgp)))

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))))

2477

1822

# New empty GnuTLS certificate

2478

crt = gnutls.openpgp_crt_t()

2479

gnutls.openpgp_crt_init(ctypes.byref(crt))

1823

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1824

(gnutls.library.functions

1825

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2480

1826

# Import the OpenPGP public key into the certificate

2481

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

2482

gnutls.OPENPGP_FMT_RAW)

1827

(gnutls.library.functions

1828

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

1829

gnutls.library.constants

1830

.GNUTLS_OPENPGP_FMT_RAW))

2483

1831

# Verify the self signature in the key

2484

1832

crtverify = ctypes.c_uint()

2485

gnutls.openpgp_crt_verify_self(crt, 0,

2486

ctypes.byref(crtverify))

1833

(gnutls.library.functions

1834

.gnutls_openpgp_crt_verify_self(crt, 0,

1835

ctypes.byref(crtverify)))

2487

1836

if crtverify.value != 0:

2488

gnutls.openpgp_crt_deinit(crt)

2489

raise gnutls.CertificateSecurityError(code

2490

=crtverify.value)

1837

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1838

raise (gnutls.errors.CertificateSecurityError

1839

("Verify failed"))

2491

1840

# New buffer for the fingerprint

2492

1841

buf = ctypes.create_string_buffer(20)

2493

1842

buf_len = ctypes.c_size_t()

2494

1843

# Get the fingerprint from the certificate into the buffer

2495

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

2496

ctypes.byref(buf_len))

1844

(gnutls.library.functions

1845

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

1846

ctypes.byref(buf_len)))

2497

1847

# Deinit the certificate

2498

gnutls.openpgp_crt_deinit(crt)

1848

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2499

1849

# Convert the buffer to a Python bytestring

2500

1850

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

2501

1851

# Convert the bytestring to hexadecimal notation

2503

1853

return hex_fpr

2504

1854

2505

1855

2506

class MultiprocessingMixIn:

1856

class MultiprocessingMixIn(object):

2507

1857

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

2508

2509

1858

def sub_process_main(self, request, address):

2510

1859

try:

2511

1860

self.finish_request(request, address)

2512

1861

except Exception:

2513

1862

self.handle_error(request, address)

2514

1863

self.close_request(request)

2515

1864

2516

1865

def process_request(self, request, address):

2517

1866

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

2518

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

2519

args=(request, address))

1867

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

1868

args = (request, address))

2520

1869

proc.start()

2521

1870

return proc

2522

1871

2523

1872

2524

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1873

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2525

1874

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

2526

2527

1875

def process_request(self, request, client_address):

2528

1876

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

2529

1877

2530

1878

This function creates a new pipe in self.pipe

2531

1879

"""

2532

1880

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2533

1881

2534

1882

proc = MultiprocessingMixIn.process_request(self, request,

2535

1883

client_address)

2536

1884

self.child_pipe.close()

2537

1885

self.add_pipe(parent_pipe, proc)

2538

1886

2539

1887

def add_pipe(self, parent_pipe, proc):

2540

1888

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

2541

raise NotImplementedError()

1889

raise NotImplementedError

2542

1890

2543

1891

2544

1892

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2545

socketserver.TCPServer):

1893

socketserver.TCPServer, object):

2546

1894

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

2547

1895

2548

1896

Attributes:

2549

1897

enabled: Boolean; whether this server is activated yet

2550

1898

interface: None or a network interface name (string)

2551

1899

use_ipv6: Boolean; to use IPv6 or not

2552

1900

"""

2553

2554

1901

def __init__(self, server_address, RequestHandlerClass,

2555

interface=None,

2556

use_ipv6=True,

2557

socketfd=None):

2558

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

2559

creating a new one with socket.socket().

2560

"""

1902

interface=None, use_ipv6=True):

2561

1903

self.interface = interface

2562

1904

if use_ipv6:

2563

1905

self.address_family = socket.AF_INET6

2564

if socketfd is not None:

2565

# Save the file descriptor

2566

self.socketfd = socketfd

2567

# Save the original socket.socket() function

2568

self.socket_socket = socket.socket

2569

2570

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

2571

#

2572

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

2573

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

2574

# patching socket.socket.)

2575

#

2576

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

2577

@functools.wraps(socket.socket)

2578

def socket_wrapper(*args, **kwargs):

2579

# Restore original function so subsequent calls are

2580

# not affected.

2581

socket.socket = self.socket_socket

2582

del self.socket_socket

2583

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

2584

# saved file descriptor.

2585

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

2586

# Replace socket.socket() function with wrapper

2587

socket.socket = socket_wrapper

2588

# The socketserver.TCPServer.__init__ will call

2589

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

2590

# socket_wrapper(), if socketfd was set.

2591

1906

socketserver.TCPServer.__init__(self, server_address,

2592

1907

RequestHandlerClass)

2593

2594

1908

def server_bind(self):

2595

1909

"""This overrides the normal server_bind() function

2596

1910

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

2597

1911

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

2598

global SO_BINDTODEVICE

2599

1912

if self.interface is not None:

2600

1913

if SO_BINDTODEVICE is None:

2601

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

2602

# common enough.

2603

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

2604

SO_BINDTODEVICE = 25

2605

try:

2606

self.socket.setsockopt(

2607

socket.SOL_SOCKET, SO_BINDTODEVICE,

2608

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

2609

except socket.error as error:

2610

if error.errno == errno.EPERM:

2611

logger.error("No permission to bind to"

2612

" interface %s", self.interface)

2613

elif error.errno == errno.ENOPROTOOPT:

2614

logger.error("SO_BINDTODEVICE not available;"

2615

" cannot bind to interface %s",

2616

self.interface)

2617

elif error.errno == errno.ENODEV:

2618

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

2619

" cannot bind", self.interface)

2620

else:

2621

raise

1914

logger.error("SO_BINDTODEVICE does not exist;"

1915

" cannot bind to interface %s",

1916

self.interface)

1917

else:

1918

try:

1919

self.socket.setsockopt(socket.SOL_SOCKET,

1920

SO_BINDTODEVICE,

1921

str(self.interface

1922

+ '\0'))

1923

except socket.error as error:

1924

if error.errno == errno.EPERM:

1925

logger.error("No permission to"

1926

" bind to interface %s",

1927

self.interface)

1928

elif error.errno == errno.ENOPROTOOPT:

1929

logger.error("SO_BINDTODEVICE not available;"

1930

" cannot bind to interface %s",

1931

self.interface)

1932

elif error.errno == errno.ENODEV:

1933

logger.error("Interface %s does not"

1934

" exist, cannot bind",

1935

self.interface)

1936

else:

1937

raise

2622

1938

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

2623

1939

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

2624

if self.server_address[1]:

2625

self.allow_reuse_address = True

2626

1940

if not self.server_address[0]:

2627

1941

if self.address_family == socket.AF_INET6:

2628

any_address = "::" # in6addr_any

1942

any_address = "::" # in6addr_any

2629

1943

else:

2630

any_address = "0.0.0.0" # INADDR_ANY

1944

any_address = socket.INADDR_ANY

2631

1945

self.server_address = (any_address,

2632

1946

self.server_address[1])

2633

1947

elif not self.server_address[1]:

2634

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

1948

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

1949

0)

2635

1950

# if self.interface:

2636

1951

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

2637

1952

# 0, # port

2643

1958

2644

1959

class MandosServer(IPv6_TCPServer):

2645

1960

"""Mandos server.

2646

1961

2647

1962

Attributes:

2648

1963

clients: set of Client objects

2649

1964

gnutls_priority GnuTLS priority string

2650

1965

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

2651

2652

Assumes a GLib.MainLoop event loop.

1966

1967

Assumes a gobject.MainLoop event loop.

2653

1968

"""

2654

2655

1969

def __init__(self, server_address, RequestHandlerClass,

2656

interface=None,

2657

use_ipv6=True,

2658

clients=None,

2659

gnutls_priority=None,

2660

use_dbus=True,

2661

socketfd=None):

1970

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

1971

gnutls_priority=None, use_dbus=True):

2662

1972

self.enabled = False

2663

1973

self.clients = clients

2664

1974

if self.clients is None:

2667

1977

self.gnutls_priority = gnutls_priority

2668

1978

IPv6_TCPServer.__init__(self, server_address,

2669

1979

RequestHandlerClass,

2670

interface=interface,

2671

use_ipv6=use_ipv6,

2672

socketfd=socketfd)

2673

1980

interface = interface,

1981

use_ipv6 = use_ipv6)

2674

1982

def server_activate(self):

2675

1983

if self.enabled:

2676

1984

return socketserver.TCPServer.server_activate(self)

2677

1985

2678

1986

def enable(self):

2679

1987

self.enabled = True

2680

1988

2681

1989

def add_pipe(self, parent_pipe, proc):

2682

1990

# Call "handle_ipc" for both data and EOF events

2683

GLib.io_add_watch(

2684

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

2685

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

2686

functools.partial(self.handle_ipc,

2687

parent_pipe=parent_pipe,

2688

proc=proc))

2689

2690

def handle_ipc(self, source, condition,

2691

parent_pipe=None,

2692

proc=None,

2693

client_object=None):

1991

gobject.io_add_watch(parent_pipe.fileno(),

1992

gobject.IO_IN | gobject.IO_HUP,

1993

functools.partial(self.handle_ipc,

1994

parent_pipe =

1995

parent_pipe,

1996

proc = proc))

1997

1998

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

1999

proc = None, client_object=None):

2694

2000

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

2695

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

2001

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

2696

2002

# Wait for other process to exit

2697

2003

proc.join()

2698

2004

return False

2699

2005

2700

2006

# Read a request from the child

2701

2007

request = parent_pipe.recv()

2702

2008

command = request[0]

2703

2009

2704

2010

if command == 'init':

2705

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

2706

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

2707

address = request[3]

2708

2709

for c in self.clients.values():

2710

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2711

continue

2712

if key_id and c.key_id == key_id:

2713

client = c

2714

break

2715

if fpr and c.fingerprint == fpr:

2011

fpr = request[1]

2012

address = request[2]

2013

2014

for c in self.clients.itervalues():

2015

if c.fingerprint == fpr:

2716

2016

client = c

2717

2017

break

2718

2018

else:

2719

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

2720

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

2019

logger.info("Client not found for fingerprint: %s, ad"

2020

"dress: %s", fpr, address)

2721

2021

if self.use_dbus:

2722

2022

# Emit D-Bus signal

2723

mandos_dbus_service.ClientNotFound(key_id or fpr,

2023

mandos_dbus_service.ClientNotFound(fpr,

2724

2024

address[0])

2725

2025

parent_pipe.send(False)

2726

2026

return False

2727

2728

GLib.io_add_watch(

2729

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

2730

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

2731

functools.partial(self.handle_ipc,

2732

parent_pipe=parent_pipe,

2733

proc=proc,

2734

client_object=client))

2027

2028

gobject.io_add_watch(parent_pipe.fileno(),

2029

gobject.IO_IN | gobject.IO_HUP,

2030

functools.partial(self.handle_ipc,

2031

parent_pipe =

2032

parent_pipe,

2033

proc = proc,

2034

client_object =

2035

client))

2735

2036

parent_pipe.send(True)

2736

2037

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

2737

2038

# same fileno

2740

2041

funcname = request[1]

2741

2042

args = request[2]

2742

2043

kwargs = request[3]

2743

2044

2744

2045

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

2745

2046

funcname)(*args,

2746

**kwargs)))

2747

2047

**kwargs)))

2048

2748

2049

if command == 'getattr':

2749

2050

attrname = request[1]

2750

if isinstance(client_object.__getattribute__(attrname),

2751

collections.Callable):

2752

parent_pipe.send(('function', ))

2051

if callable(client_object.__getattribute__(attrname)):

2052

parent_pipe.send(('function',))

2753

2053

else:

2754

parent_pipe.send((

2755

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

2756

2054

parent_pipe.send(('data', client_object

2055

.__getattribute__(attrname)))

2056

2757

2057

if command == 'setattr':

2758

2058

attrname = request[1]

2759

2059

value = request[2]

2760

2060

setattr(client_object, attrname, value)

2761

2061

2762

2062

return True

2763

2063

2764

2064

2765

def rfc3339_duration_to_delta(duration):

2766

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

2767

2768

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

2769

True

2770

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

2771

True

2772

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

2773

True

2774

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

2775

True

2776

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

2777

True

2778

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

2779

True

2780

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

2781

True

2782

"""

2783

2784

# Parsing an RFC 3339 duration with regular expressions is not

2785

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

2786

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

2787

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

2788

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

2789

# avoid excessive use of external libraries.

2790

2791

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

2792

Token = collections.namedtuple("Token", (

2793

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

2794

# a "group" containing digits

2795

"value", # datetime.timedelta or None

2796

"followers")) # Tokens valid after this token

2797

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

2798

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

2799

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

2800

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

2801

datetime.timedelta(seconds=1),

2802

frozenset((token_end, )))

2803

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

2804

datetime.timedelta(minutes=1),

2805

frozenset((token_second, token_end)))

2806

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

2807

datetime.timedelta(hours=1),

2808

frozenset((token_minute, token_end)))

2809

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

2810

None,

2811

frozenset((token_hour, token_minute,

2812

token_second)))

2813

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

2814

datetime.timedelta(days=1),

2815

frozenset((token_time, token_end)))

2816

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

2817

datetime.timedelta(weeks=4),

2818

frozenset((token_day, token_end)))

2819

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

2820

datetime.timedelta(weeks=52),

2821

frozenset((token_month, token_end)))

2822

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

2823

datetime.timedelta(weeks=1),

2824

frozenset((token_end, )))

2825

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

2826

frozenset((token_year, token_month,

2827

token_day, token_time,

2828

token_week)))

2829

# Define starting values:

2830

# Value so far

2831

value = datetime.timedelta()

2832

found_token = None

2833

# Following valid tokens

2834

followers = frozenset((token_duration, ))

2835

# String left to parse

2836

s = duration

2837

# Loop until end token is found

2838

while found_token is not token_end:

2839

# Search for any currently valid tokens

2840

for token in followers:

2841

match = token.regexp.match(s)

2842

if match is not None:

2843

# Token found

2844

if token.value is not None:

2845

# Value found, parse digits

2846

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

2847

# Add to value so far

2848

value += factor * token.value

2849

# Strip token from string

2850

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

2851

# Go to found token

2852

found_token = token

2853

# Set valid next tokens

2854

followers = found_token.followers

2855

break

2856

else:

2857

# No currently valid tokens were found

2858

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

2859

.format(duration))

2860

# End token found

2861

return value

2862

2863

2864

2065

def string_to_delta(interval):

2865

2066

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

2866

2867

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

2868

True

2869

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

2870

True

2871

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

2872

True

2873

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

2874

True

2875

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

2876

True

2877

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

2878

True

2067

2068

>>> string_to_delta('7d')

2069

datetime.timedelta(7)

2070

>>> string_to_delta('60s')

2071

datetime.timedelta(0, 60)

2072

>>> string_to_delta('60m')

2073

datetime.timedelta(0, 3600)

2074

>>> string_to_delta('24h')

2075

datetime.timedelta(1)

2076

>>> string_to_delta('1w')

2077

datetime.timedelta(7)

2078

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

2079

datetime.timedelta(0, 330)

2879

2080

"""

2880

2881

try:

2882

return rfc3339_duration_to_delta(interval)

2883

except ValueError:

2884

pass

2885

2886

2081

timevalue = datetime.timedelta(0)

2887

2082

for s in interval.split():

2888

2083

try:

2889

suffix = s[-1]

2084

suffix = unicode(s[-1])

2890

2085

value = int(s[:-1])

2891

2086

if suffix == "d":

2892

2087

delta = datetime.timedelta(value)

2899

2094

elif suffix == "w":

2900

2095

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

2901

2096

else:

2902

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

2903

except IndexError as e:

2097

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

2098

.format(suffix))

2099

except (ValueError, IndexError) as e:

2904

2100

raise ValueError(*(e.args))

2905

2101

timevalue += delta

2906

2102

return timevalue

2907

2103

2908

2104

2909

def daemon(nochdir=False, noclose=False):

2105

def daemon(nochdir = False, noclose = False):

2910

2106

"""See daemon(3). Standard BSD Unix function.

2911

2107

2912

2108

This should really exist as os.daemon, but it doesn't (yet)."""

2913

2109

if os.fork():

2914

2110

sys.exit()

2922

2118

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

2923

2119

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

2924

2120

raise OSError(errno.ENODEV,

2925

"{} not a character device"

2121

"{0} not a character device"

2926

2122

.format(os.devnull))

2927

2123

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

2928

2124

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

2932

2128

2933

2129

2934

2130

def main():

2935

2131

2936

2132

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

2937

2133

# Parsing of options, both command line and config file

2938

2134

2939

2135

parser = argparse.ArgumentParser()

2940

2136

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

2941

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

2137

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

2942

2138

help="show version number and exit")

2943

2139

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

2944

2140

help="Bind to interface IF")

2950

2146

help="Run self-test")

2951

2147

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

2952

2148

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

2953

" to terminal", default=None)

2149

" to terminal")

2954

2150

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

2955

2151

help="Debug level for stdout output")

2956

2152

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

2963

2159

" files")

2964

2160

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

2965

2161

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

2966

" system bus interface", default=None)

2162

" system bus interface")

2967

2163

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

2968

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

2969

default=None)

2164

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

2970

2165

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

2971

2166

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

2972

" state", default=None)

2973

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

2974

help="Specify a file descriptor to a network"

2975

" socket to use instead of creating one")

2167

" state")

2976

2168

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

2977

2169

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

2978

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

2979

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

2980

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

2981

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

2982

default=None)

2983

2170

2984

2171

options = parser.parse_args()

2985

2172

2173

if options.check:

2174

import doctest

2175

doctest.testmod()

2176

sys.exit()

2177

2986

2178

# Default values for config file for server-global settings

2987

if gnutls.has_rawpk:

2988

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

2989

":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")

2990

else:

2991

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

2992

":+SIGN-DSA-SHA256")

2993

server_defaults = {"interface": "",

2994

"address": "",

2995

"port": "",

2996

"debug": "False",

2997

"priority": priority,

2998

"servicename": "Mandos",

2999

"use_dbus": "True",

3000

"use_ipv6": "True",

3001

"debuglevel": "",

3002

"restore": "True",

3003

"socket": "",

3004

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

3005

"foreground": "False",

3006

"zeroconf": "True",

3007

}

3008

del priority

3009

2179

server_defaults = { "interface": "",

2180

"address": "",

2181

"port": "",

2182

"debug": "False",

2183

"priority":

2184

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

2185

"servicename": "Mandos",

2186

"use_dbus": "True",

2187

"use_ipv6": "True",

2188

"debuglevel": "",

2189

"restore": "True",

2190

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

2191

}

2192

3010

2193

# Parse config file for server-global settings

3011

server_config = configparser.ConfigParser(server_defaults)

2194

server_config = configparser.SafeConfigParser(server_defaults)

3012

2195

del server_defaults

3013

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

3014

# Convert the ConfigParser object to a dict

2196

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

2197

"mandos.conf"))

2198

# Convert the SafeConfigParser object to a dict

3015

2199

server_settings = server_config.defaults()

3016

2200

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

3017

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

3018

"foreground", "zeroconf"):

2201

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

3019

2202

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

3020

2203

option)

3021

2204

if server_settings["port"]:

3022

2205

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

3023

2206

"port")

3024

if server_settings["socket"]:

3025

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

3026

"socket")

3027

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

3028

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

3029

# happen with a supplied network socket.

3030

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

3031

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

3032

["socket"])

3033

2207

del server_config

3034

2208

3035

2209

# Override the settings from the config file with command line

3036

2210

# options, if set.

3037

2211

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

3038

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

3039

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

3040

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

2212

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

2213

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

2214

"statedir"):

3041

2215

value = getattr(options, option)

3042

2216

if value is not None:

3043

2217

server_settings[option] = value

3044

2218

del options

3045

2219

# Force all strings to be unicode

3046

2220

for option in server_settings.keys():

3047

if isinstance(server_settings[option], bytes):

3048

server_settings[option] = (server_settings[option]

3049

.decode("utf-8"))

3050

# Force all boolean options to be boolean

3051

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

3052

"foreground", "zeroconf"):

3053

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

3054

# Debug implies foreground

3055

if server_settings["debug"]:

3056

server_settings["foreground"] = True

2221

if type(server_settings[option]) is str:

2222

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

3057

2223

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

3058

2224

3059

2225

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

3060

3061

if (not server_settings["zeroconf"]

3062

and not (server_settings["port"]

3063

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

3064

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

3065

2226

3066

2227

# For convenience

3067

2228

debug = server_settings["debug"]

3068

2229

debuglevel = server_settings["debuglevel"]

3070

2231

use_ipv6 = server_settings["use_ipv6"]

3071

2232

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

3072

2233

stored_state_file)

3073

foreground = server_settings["foreground"]

3074

zeroconf = server_settings["zeroconf"]

3075

2234

3076

2235

if debug:

3077

2236

initlogger(debug, logging.DEBUG)

3078

2237

else:

3081

2240

else:

3082

2241

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

3083

2242

initlogger(debug, level)

3084

2243

3085

2244

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

3086

syslogger.setFormatter(

3087

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

3088

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

3089

server_settings["servicename"])))

3090

2245

syslogger.setFormatter(logging.Formatter

2246

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

2247

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

2248

.format(server_settings

2249

["servicename"])))

2250

3091

2251

# Parse config file with clients

3092

client_config = configparser.ConfigParser(Client.client_defaults)

2252

client_config = configparser.SafeConfigParser(Client

2253

.client_defaults)

3093

2254

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

3094

2255

"clients.conf"))

3095

2256

3096

2257

global mandos_dbus_service

3097

2258

mandos_dbus_service = None

3098

3099

socketfd = None

3100

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

3101

socketfd = server_settings["socket"]

3102

tcp_server = MandosServer(

3103

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

3104

ClientHandler,

3105

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

3106

use_ipv6=use_ipv6,

3107

gnutls_priority=server_settings["priority"],

3108

use_dbus=use_dbus,

3109

socketfd=socketfd)

3110

if not foreground:

3111

pidfilename = "/run/mandos.pid"

3112

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

3113

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

3114

pidfile = None

2259

2260

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

2261

server_settings["port"]),

2262

ClientHandler,

2263

interface=(server_settings["interface"]

2264

or None),

2265

use_ipv6=use_ipv6,

2266

gnutls_priority=

2267

server_settings["priority"],

2268

use_dbus=use_dbus)

2269

if not debug:

2270

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

3115

2271

try:

3116

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

2272

pidfile = open(pidfilename, "w")

3117

2273

except IOError as e:

3118

2274

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

3119

2275

exc_info=e)

3120

3121

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

3122

("mandos", "mandos"),

3123

("nobody", "nogroup")):

2276

2277

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

3124

2278

try:

3125

2279

uid = pwd.getpwnam(name).pw_uid

3126

gid = pwd.getpwnam(group).pw_gid

2280

gid = pwd.getpwnam(name).pw_gid

3127

2281

break

3128

2282

except KeyError:

3129

2283

continue

3133

2287

try:

3134

2288

os.setgid(gid)

3135

2289

os.setuid(uid)

3136

if debug:

3137

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

3138

gid))

3139

2290

except OSError as error:

3140

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

3141

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

3142

2291

if error.errno != errno.EPERM:

3143

raise

3144

2292

raise error

2293

3145

2294

if debug:

3146

2295

# Enable all possible GnuTLS debugging

3147

2296

3148

2297

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

3149

2298

# - GnuTLS manual

3150

gnutls.global_set_log_level(11)

3151

3152

@gnutls.log_func

2299

gnutls.library.functions.gnutls_global_set_log_level(11)

2300

2301

@gnutls.library.types.gnutls_log_func

3153

2302

def debug_gnutls(level, string):

3154

2303

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

3155

3156

gnutls.global_set_log_function(debug_gnutls)

3157

2304

2305

(gnutls.library.functions

2306

.gnutls_global_set_log_function(debug_gnutls))

2307

3158

2308

# Redirect stdin so all checkers get /dev/null

3159

2309

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

3160

2310

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

3161

2311

if null > 2:

3162

2312

os.close(null)

3163

2313

3164

2314

# Need to fork before connecting to D-Bus

3165

if not foreground:

2315

if not debug:

3166

2316

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

3167

2317

daemon()

3168

3169

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

3170

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

3171

# need to inform GLib that threads will be used.

3172

GLib.threads_init()

3173

2318

2319

gobject.threads_init()

2320

3174

2321

global main_loop

3175

2322

# From the Avahi example code

3176

2323

DBusGMainLoop(set_as_default=True)

3177

main_loop = GLib.MainLoop()

2324

main_loop = gobject.MainLoop()

3178

2325

bus = dbus.SystemBus()

3179

2326

# End of Avahi example code

3180

2327

if use_dbus:

3181

2328

try:

3182

2329

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

3183

bus,

3184

do_not_queue=True)

3185

old_bus_name = dbus.service.BusName(

3186

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

3187

do_not_queue=True)

3188

except dbus.exceptions.DBusException as e:

2330

bus, do_not_queue=True)

2331

old_bus_name = (dbus.service.BusName

2332

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

2333

do_not_queue=True))

2334

except dbus.exceptions.NameExistsException as e:

3189

2335

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

3190

2336

use_dbus = False

3191

2337

server_settings["use_dbus"] = False

3192

2338

tcp_server.use_dbus = False

3193

if zeroconf:

3194

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3195

service = AvahiServiceToSyslog(

3196

name=server_settings["servicename"],

3197

servicetype="_mandos._tcp",

3198

protocol=protocol,

3199

bus=bus)

3200

if server_settings["interface"]:

3201

service.interface = if_nametoindex(

3202

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

3203

2339

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2340

service = AvahiServiceToSyslog(name =

2341

server_settings["servicename"],

2342

servicetype = "_mandos._tcp",

2343

protocol = protocol, bus = bus)

2344

if server_settings["interface"]:

2345

service.interface = (if_nametoindex

2346

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

2347

3204

2348

global multiprocessing_manager

3205

2349

multiprocessing_manager = multiprocessing.Manager()

3206

2350

3207

2351

client_class = Client

3208

2352

if use_dbus:

3209

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

3210

2353

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

2354

3211

2355

client_settings = Client.config_parser(client_config)

3212

2356

old_client_settings = {}

3213

2357

clients_data = {}

3214

3215

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

3216

global wnull

3217

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

3218

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

3219

# mode

3220

if debug or not foreground:

3221

wnull.close()

3222

2358

3223

2359

# Get client data and settings from last running state.

3224

2360

if server_settings["restore"]:

3225

2361

try:

3226

2362

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

3227

if sys.version_info.major == 2:

3228

clients_data, old_client_settings = pickle.load(

3229

stored_state)

3230

else:

3231

bytes_clients_data, bytes_old_client_settings = (

3232

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

3233

# Fix bytes to strings

3234

# clients_data

3235

# .keys()

3236

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

3237

if isinstance(key, bytes)

3238

else key): value

3239

for key, value in

3240

bytes_clients_data.items()}

3241

del bytes_clients_data

3242

for key in clients_data:

3243

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

3244

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

3245

for k, v in

3246

clients_data[key].items()}

3247

clients_data[key] = value

3248

# .client_structure

3249

value["client_structure"] = [

3250

(s.decode("utf-8")

3251

if isinstance(s, bytes)

3252

else s) for s in

3253

value["client_structure"]]

3254

# .name, .host, and .checker_command

3255

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

3256

if isinstance(value[k], bytes):

3257

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

3258

if "key_id" not in value:

3259

value["key_id"] = ""

3260

elif "fingerprint" not in value:

3261

value["fingerprint"] = ""

3262

# old_client_settings

3263

# .keys()

3264

old_client_settings = {

3265

(key.decode("utf-8")

3266

if isinstance(key, bytes)

3267

else key): value

3268

for key, value in

3269

bytes_old_client_settings.items()}

3270

del bytes_old_client_settings

3271

# .host and .checker_command

3272

for value in old_client_settings.values():

3273

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

3274

if isinstance(value[attribute], bytes):

3275

value[attribute] = (value[attribute]

3276

.decode("utf-8"))

2363

clients_data, old_client_settings = (pickle.load

2364

(stored_state))

3277

2365

os.remove(stored_state_path)

3278

2366

except IOError as e:

3279

2367

if e.errno == errno.ENOENT:

3280

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

3281

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

2368

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

2369

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

3282

2370

else:

3283

2371

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

3284

2372

exc_info=e)

3285

2373

raise

3286

2374

except EOFError as e:

3287

2375

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

3288

"EOFError:",

3289

exc_info=e)

3290

2376

"EOFError:", exc_info=e)

2377

3291

2378

with PGPEngine() as pgp:

3292

for client_name, client in clients_data.items():

3293

# Skip removed clients

3294

if client_name not in client_settings:

3295

continue

3296

2379

for client_name, client in clients_data.iteritems():

3297

2380

# Decide which value to use after restoring saved state.

3298

2381

# We have three different values: Old config file,

3299

2382

# new config file, and saved state.

3304

2387

# For each value in new config, check if it

3305

2388

# differs from the old config value (Except for

3306

2389

# the "secret" attribute)

3307

if (name != "secret"

3308

and (value !=

3309

old_client_settings[client_name][name])):

2390

if (name != "secret" and

2391

value != old_client_settings[client_name]

2392

[name]):

3310

2393

client[name] = value

3311

2394

except KeyError:

3312

2395

pass

3313

2396

3314

2397

# Clients who has passed its expire date can still be

3315

# enabled if its last checker was successful. A Client

2398

# enabled if its last checker was successful. Clients

3316

2399

# whose checker succeeded before we stored its state is

3317

2400

# assumed to have successfully run all checkers during

3318

2401

# downtime.

3320

2403

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

3321

2404

if not client["last_checked_ok"]:

3322

2405

logger.warning(

3323

"disabling client {} - Client never "

3324

"performed a successful checker".format(

3325

client_name))

2406

"disabling client {0} - Client never "

2407

"performed a successful checker"

2408

.format(client_name))

3326

2409

client["enabled"] = False

3327

2410

elif client["last_checker_status"] != 0:

3328

2411

logger.warning(

3329

"disabling client {} - Client last"

3330

" checker failed with error code"

3331

" {}".format(

3332

client_name,

3333

client["last_checker_status"]))

2412

"disabling client {0} - Client "

2413

"last checker failed with error code {1}"

2414

.format(client_name,

2415

client["last_checker_status"]))

3334

2416

client["enabled"] = False

3335

2417

else:

3336

client["expires"] = (

3337

datetime.datetime.utcnow()

3338

+ client["timeout"])

2418

client["expires"] = (datetime.datetime

2419

.utcnow()

2420

+ client["timeout"])

3339

2421

logger.debug("Last checker succeeded,"

3340

" keeping {} enabled".format(

3341

client_name))

2422

" keeping {0} enabled"

2423

.format(client_name))

3342

2424

try:

3343

client["secret"] = pgp.decrypt(

3344

client["encrypted_secret"],

3345

client_settings[client_name]["secret"])

2425

client["secret"] = (

2426

pgp.decrypt(client["encrypted_secret"],

2427

client_settings[client_name]

2428

["secret"]))

3346

2429

except PGPError:

3347

2430

# If decryption fails, we use secret from new settings

3348

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

3349

client_name))

3350

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

3351

["secret"])

3352

2431

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

2432

.format(client_name))

2433

client["secret"] = (

2434

client_settings[client_name]["secret"])

2435

3353

2436

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

3354

2437

for client_name in (set(old_client_settings)

3355

2438

- set(client_settings)):

3357

2440

for client_name in (set(client_settings)

3358

2441

- set(old_client_settings)):

3359

2442

clients_data[client_name] = client_settings[client_name]

3360

2443

3361

2444

# Create all client objects

3362

for client_name, client in clients_data.items():

2445

for client_name, client in clients_data.iteritems():

3363

2446

tcp_server.clients[client_name] = client_class(

3364

name=client_name,

3365

settings=client,

3366

server_settings=server_settings)

3367

2447

name = client_name, settings = client)

2448

3368

2449

if not tcp_server.clients:

3369

2450

logger.warning("No clients defined")

3370

3371

if not foreground:

3372

if pidfile is not None:

3373

pid = os.getpid()

3374

try:

3375

with pidfile:

3376

print(pid, file=pidfile)

3377

except IOError:

3378

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

3379

pidfilename, pid)

3380

del pidfile

2451

2452

if not debug:

2453

try:

2454

with pidfile:

2455

pid = os.getpid()

2456

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

2457

del pidfile

2458

except IOError:

2459

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

2460

pidfilename, pid)

2461

except NameError:

2462

# "pidfile" was never created

2463

pass

3381

2464

del pidfilename

3382

3383

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

3384

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3385

lambda: main_loop.quit() and False)

3386

2465

2466

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

2467

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

2468

3387

2469

if use_dbus:

3388

3389

@alternate_dbus_interfaces(

3390

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

3391

class MandosDBusService(DBusObjectWithObjectManager):

2470

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

2471

"se.bsnet.fukt.Mandos"})

2472

class MandosDBusService(DBusObjectWithProperties):

3392

2473

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

3393

3394

2474

def __init__(self):

3395

2475

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

3396

3397

2476

_interface = "se.recompile.Mandos"

3398

2477

2478

@dbus_interface_annotations(_interface)

2479

def _foo(self):

2480

return { "org.freedesktop.DBus.Property"

2481

".EmitsChangedSignal":

2482

"false"}

2483

3399

2484

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

3400

2485

def ClientAdded(self, objpath):

3401

2486

"D-Bus signal"

3402

2487

pass

3403

2488

3404

2489

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

3405

def ClientNotFound(self, key_id, address):

2490

def ClientNotFound(self, fingerprint, address):

3406

2491

"D-Bus signal"

3407

2492

pass

3408

3409

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

3410

"true"})

2493

3411

2494

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

3412

2495

def ClientRemoved(self, objpath, name):

3413

2496

"D-Bus signal"

3414

2497

pass

3415

3416

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

3417

"true"})

2498

3418

2499

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

3419

2500

def GetAllClients(self):

3420

2501

"D-Bus method"

3421

return dbus.Array(c.dbus_object_path for c in

3422

tcp_server.clients.values())

3423

3424

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

3425

"true"})

2502

return dbus.Array(c.dbus_object_path

2503

for c in

2504

tcp_server.clients.itervalues())

2505

3426

2506

@dbus.service.method(_interface,

3427

2507

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

3428

2508

def GetAllClientsWithProperties(self):

3429

2509

"D-Bus method"

3430

2510

return dbus.Dictionary(

3431

{c.dbus_object_path: c.GetAll(

3432

"se.recompile.Mandos.Client")

3433

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

2511

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

2512

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

3434

2513

signature="oa{sv}")

3435

2514

3436

2515

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

3437

2516

def RemoveClient(self, object_path):

3438

2517

"D-Bus method"

3439

for c in tcp_server.clients.values():

2518

for c in tcp_server.clients.itervalues():

3440

2519

if c.dbus_object_path == object_path:

3441

2520

del tcp_server.clients[c.name]

3442

2521

c.remove_from_connection()

3443

# Don't signal the disabling

2522

# Don't signal anything except ClientRemoved

3444

2523

c.disable(quiet=True)

3445

# Emit D-Bus signal for removal

3446

self.client_removed_signal(c)

2524

# Emit D-Bus signal

2525

self.ClientRemoved(object_path, c.name)

3447

2526

return

3448

2527

raise KeyError(object_path)

3449

2528

3450

2529

del _interface

3451

3452

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3453

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

3454

def GetManagedObjects(self):

3455

"""D-Bus method"""

3456

return dbus.Dictionary(

3457

{client.dbus_object_path:

3458

dbus.Dictionary(

3459

{interface: client.GetAll(interface)

3460

for interface in

3461

client._get_all_interface_names()})

3462

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

3463

3464

def client_added_signal(self, client):

3465

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

3466

if use_dbus:

3467

# New standard signal

3468

self.InterfacesAdded(

3469

client.dbus_object_path,

3470

dbus.Dictionary(

3471

{interface: client.GetAll(interface)

3472

for interface in

3473

client._get_all_interface_names()}))

3474

# Old signal

3475

self.ClientAdded(client.dbus_object_path)

3476

3477

def client_removed_signal(self, client):

3478

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

3479

if use_dbus:

3480

# New standard signal

3481

self.InterfacesRemoved(

3482

client.dbus_object_path,

3483

client._get_all_interface_names())

3484

# Old signal

3485

self.ClientRemoved(client.dbus_object_path,

3486

client.name)

3487

2530

3488

2531

mandos_dbus_service = MandosDBusService()

3489

3490

# Save modules to variables to exempt the modules from being

3491

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

3492

mp = multiprocessing

3493

wn = wnull

3494

2532

3495

2533

def cleanup():

3496

2534

"Cleanup function; run on exit"

3497

if zeroconf:

3498

service.cleanup()

3499

3500

mp.active_children()

3501

wn.close()

2535

service.cleanup()

2536

2537

multiprocessing.active_children()

3502

2538

if not (tcp_server.clients or client_settings):

3503

2539

return

3504

2540

3505

2541

# Store client before exiting. Secrets are encrypted with key

3506

2542

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

3507

2543

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

3508

2544

clients = {}

3509

2545

with PGPEngine() as pgp:

3510

for client in tcp_server.clients.values():

2546

for client in tcp_server.clients.itervalues():

3511

2547

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

3512

2548

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

3513

2549

key)

3514

2550

client_dict = {}

3515

2551

3516

2552

# A list of attributes that can not be pickled

3517

2553

# + secret.

3518

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

3519

"checker", "server_settings"}

3520

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

3521

.Object):

2554

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

2555

"checker"))

2556

for name, typ in (inspect.getmembers

2557

(dbus.service.Object)):

3522

2558

exclude.add(name)

3523

2559

3524

2560

client_dict["encrypted_secret"] = (client

3525

2561

.encrypted_secret)

3526

2562

for attr in client.client_structure:

3527

2563

if attr not in exclude:

3528

2564

client_dict[attr] = getattr(client, attr)

3529

2565

3530

2566

clients[client.name] = client_dict

3531

2567

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

3532

2568

3533

2569

try:

3534

with tempfile.NamedTemporaryFile(

3535

mode='wb',

3536

suffix=".pickle",

3537

prefix='clients-',

3538

dir=os.path.dirname(stored_state_path),

3539

delete=False) as stored_state:

3540

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

3541

protocol=2)

3542

tempname = stored_state.name

2570

with (tempfile.NamedTemporaryFile

2571

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

2572

dir=os.path.dirname(stored_state_path),

2573

delete=False)) as stored_state:

2574

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

2575

tempname=stored_state.name

3543

2576

os.rename(tempname, stored_state_path)

3544

2577

except (IOError, OSError) as e:

3545

2578

if not debug:

3548

2581

except NameError:

3549

2582

pass

3550

2583

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

3551

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

2584

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

3552

2585

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

3553

2586

else:

3554

2587

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

3555

2588

exc_info=e)

3556

raise

3557

2589

raise e

2590

3558

2591

# Delete all clients, and settings from config

3559

2592

while tcp_server.clients:

3560

2593

name, client = tcp_server.clients.popitem()

3561

2594

if use_dbus:

3562

2595

client.remove_from_connection()

3563

# Don't signal the disabling

2596

# Don't signal anything except ClientRemoved

3564

2597

client.disable(quiet=True)

3565

# Emit D-Bus signal for removal

3566

2598

if use_dbus:

3567

mandos_dbus_service.client_removed_signal(client)

2599

# Emit D-Bus signal

2600

mandos_dbus_service.ClientRemoved(client

2601

.dbus_object_path,

2602

client.name)

3568

2603

client_settings.clear()

3569

2604

3570

2605

atexit.register(cleanup)

3571

3572

for client in tcp_server.clients.values():

2606

2607

for client in tcp_server.clients.itervalues():

3573

2608

if use_dbus:

3574

# Emit D-Bus signal for adding

3575

mandos_dbus_service.client_added_signal(client)

2609

# Emit D-Bus signal

2610

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3576

2611

# Need to initiate checking of clients

3577

2612

if client.enabled:

3578

2613

client.init_checker()

3579

2614

3580

2615

tcp_server.enable()

3581

2616

tcp_server.server_activate()

3582

2617

3583

2618

# Find out what port we got

3584

if zeroconf:

3585

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

2619

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

3586

2620

if use_ipv6:

3587

2621

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

3588

2622

" flowinfo %d, scope_id %d",

3590

2624

else: # IPv4

3591

2625

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

3592

2626

*tcp_server.socket.getsockname())

3593

3594

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

3595

2627

2628

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

2629

3596

2630

try:

3597

if zeroconf:

3598

# From the Avahi example code

3599

try:

3600

service.activate()

3601

except dbus.exceptions.DBusException as error:

3602

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

3603

cleanup()

3604

sys.exit(1)

3605

# End of Avahi example code

3606

3607

GLib.io_add_watch(

3608

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

3609

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3610

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

3611

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

3612

2631

# From the Avahi example code

2632

try:

2633

service.activate()

2634

except dbus.exceptions.DBusException as error:

2635

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

2636

cleanup()

2637

sys.exit(1)

2638

# End of Avahi example code

2639

2640

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

2641

lambda *args, **kwargs:

2642

(tcp_server.handle_request

2643

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

2644

3613

2645

logger.debug("Starting main loop")

3614

2646

main_loop.run()

3615

2647

except AvahiError as error:

3624

2656

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

3625

2657

cleanup()

3626

2658

3627

3628

def should_only_run_tests():

3629

parser = argparse.ArgumentParser(add_help=False)

3630

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

3631

args, unknown_args = parser.parse_known_args()

3632

run_tests = args.check

3633

if run_tests:

3634

# Remove --check argument from sys.argv

3635

sys.argv[1:] = unknown_args

3636

return run_tests

3637

3638

# Add all tests from doctest strings

3639

def load_tests(loader, tests, none):

3640

import doctest

3641

tests.addTests(doctest.DocTestSuite())

3642

return tests

3643

3644

2659

if __name__ == '__main__':

3645

try:

3646

if should_only_run_tests():

3647

# Call using ./mandos --check [--verbose]

3648

unittest.main()

3649

else:

3650

main()

3651

finally:

3652

logging.shutdown()

2660

main()