/mandos/trunk : revision 1235

143

if sys.version_info < (3, 2):

144

configparser.Configparser = configparser.SafeConfigParser

145

146

version = "1.8.14"

146

version = "1.8.13"

147

stored_state_file = "clients.pickle"

148

149

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

149

logger = logging.getLogger()

150

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

151

syslogger = None

152

189

facility=logging.handlers.SysLogHandler.LOG_DAEMON,

190

address="/dev/log"))

191

syslogger.setFormatter(logging.Formatter

192

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

193

" %(message)s"))

194

log.addHandler(syslogger)

192

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

193

' %(message)s'))

194

logger.addHandler(syslogger)

195

196

if debug:

197

console = logging.StreamHandler()

198

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

199

" [%(process)d]:"

200

" %(levelname)s:"

201

" %(message)s"))

202

log.addHandler(console)

203

log.setLevel(level)

198

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

199

' [%(process)d]:'

200

' %(levelname)s:'

201

' %(message)s'))

202

logger.addHandler(console)

203

logger.setLevel(level)

204

205

206

class PGPError(Exception):

224

except OSError as e:

225

if e.errno != errno.ENOENT:

226

raise

227

self.gnupgargs = ["--batch",

228

"--homedir", self.tempdir,

229

"--force-mdc",

230

"--quiet"]

227

self.gnupgargs = ['--batch',

228

'--homedir', self.tempdir,

229

'--force-mdc',

230

'--quiet']

231

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

232

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

233

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

272

dir=self.tempdir) as passfile:

273

passfile.write(passphrase)

274

passfile.flush()

275

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

276

"--passphrase-file",

275

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

276

'--passphrase-file',

277

passfile.name]

278

+ self.gnupgargs,

279

stdin=subprocess.PIPE,

290

dir=self.tempdir) as passfile:

291

passfile.write(passphrase)

292

passfile.flush()

293

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

294

"--passphrase-file",

293

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

294

'--passphrase-file',

295

passfile.name]

296

+ self.gnupgargs,

297

stdin=subprocess.PIPE,

350

Attributes:

351

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

352

Used to optionally bind to the specified interface.

353

name: string; Example: "Mandos"

354

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

353

name: string; Example: 'Mandos'

354

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

355

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

356

port: integer; what port to announce

357

TXT: list of strings; TXT record for the service

394

def rename(self, remove=True):

395

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

396

if self.rename_count >= self.max_renames:

397

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

398

" after %i retries, exiting.",

399

self.rename_count)

397

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

398

" after %i retries, exiting.",

399

self.rename_count)

400

raise AvahiServiceError("Too many renames")

401

self.name = str(

402

self.server.GetAlternativeServiceName(self.name))

403

self.rename_count += 1

404

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

405

self.name)

404

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

405

self.name)

406

if remove:

407

self.remove()

408

try:

410

except dbus.exceptions.DBusException as error:

411

if (error.get_dbus_name()

412

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

413

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

413

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

414

return self.rename(remove=False)

415

else:

416

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

416

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

417

self.cleanup()

418

os._exit(1)

419

435

avahi.DBUS_INTERFACE_ENTRY_GROUP)

436

self.entry_group_state_changed_match = (

437

self.group.connect_to_signal(

438

"StateChanged", self.entry_group_state_changed))

439

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

440

self.name, self.type)

438

'StateChanged', self.entry_group_state_changed))

439

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

440

self.name, self.type)

441

self.group.AddService(

442

self.interface,

443

self.protocol,

450

451

def entry_group_state_changed(self, state, error):

452

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

453

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

453

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

454

455

if state == avahi.ENTRY_GROUP_ESTABLISHED:

456

log.debug("Zeroconf service established.")

456

logger.debug("Zeroconf service established.")

457

elif state == avahi.ENTRY_GROUP_COLLISION:

458

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

458

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

459

self.rename()

460

elif state == avahi.ENTRY_GROUP_FAILURE:

461

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

462

str(error))

461

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

462

str(error))

463

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

464

465

def cleanup(self):

475

476

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

477

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

478

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

478

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

479

bad_states = {

480

avahi.SERVER_INVALID: "Zeroconf server invalid",

481

avahi.SERVER_REGISTERING: None,

485

if state in bad_states:

486

if bad_states[state] is not None:

487

if error is None:

488

log.error(bad_states[state])

488

logger.error(bad_states[state])

489

else:

490

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

490

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

491

self.cleanup()

492

elif state == avahi.SERVER_RUNNING:

493

try:

495

except dbus.exceptions.DBusException as error:

496

if (error.get_dbus_name()

497

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

498

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

498

logger.info("Local Zeroconf service name"

499

" collision.")

499

500

return self.rename(remove=False)

500

501

else:

501

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

502

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

502

503

self.cleanup()

503

504

os._exit(1)

504

505

else:

505

506

if error is None:

506

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

507

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

507

508

else:

508

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

509

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

509

510

511

def activate(self):

511

512

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

526

527

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

527

528

**kwargs)

528

529

syslogger.setFormatter(logging.Formatter(

529

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

530

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

530

531

.format(self.name)))

531

532

return ret

532

533

562

563

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

563

564

565

# Types

565

class _session_int(ctypes.Structure):

566

class session_int(ctypes.Structure):

566

567

_fields_ = []

567

session_t = ctypes.POINTER(_session_int)

568

session_t = ctypes.POINTER(session_int)

568

569

570

class certificate_credentials_st(ctypes.Structure):

570

571

_fields_ = []

573

574

certificate_type_t = ctypes.c_int

574

575

576

class datum_t(ctypes.Structure):

576

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

577

("size", ctypes.c_uint)]

577

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

578

('size', ctypes.c_uint)]

578

579

class _openpgp_crt_int(ctypes.Structure):

580

class openpgp_crt_int(ctypes.Structure):

580

581

_fields_ = []

581

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

582

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

582

583

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

583

584

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

584

585

credentials_type_t = ctypes.c_int

593

594

# gnutls.strerror()

594

595

self.code = code

595

596

if message is None and code is not None:

596

message = gnutls.strerror(code).decode(

597

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

597

message = gnutls.strerror(code)

598

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

599

message, *args)

600

601

class CertificateSecurityError(Error):

602

pass

603

604

class PointerTo:

605

def __init__(self, cls):

606

self.cls = cls

607

608

def from_param(self, obj):

609

if not isinstance(obj, self.cls):

610

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

611

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

612

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

613

614

class CastToVoidPointer:

615

def __init__(self, cls):

616

self.cls = cls

617

618

def from_param(self, obj):

619

if not isinstance(obj, self.cls):

620

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

621

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

622

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

623

624

class With_from_param:

625

@classmethod

626

def from_param(cls, obj):

627

return obj._as_parameter_

628

629

604

# Classes

630

class Credentials(With_from_param):

605

class Credentials:

631

606

def __init__(self):

632

self._as_parameter_ = gnutls.certificate_credentials_t()

633

gnutls.certificate_allocate_credentials(self)

607

self._c_object = gnutls.certificate_credentials_t()

608

gnutls.certificate_allocate_credentials(

609

ctypes.byref(self._c_object))

634

610

self.type = gnutls.CRD_CERTIFICATE

635

611

636

612

def __del__(self):

637

gnutls.certificate_free_credentials(self)

613

gnutls.certificate_free_credentials(self._c_object)

638

614

639

class ClientSession(With_from_param):

615

class ClientSession:

640

616

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

641

self._as_parameter_ = gnutls.session_t()

617

self._c_object = gnutls.session_t()

642

618

gnutls_flags = gnutls.CLIENT

643

619

if gnutls.check_version(b"3.5.6"):

644

620

gnutls_flags |= gnutls.NO_TICKETS

645

621

if gnutls.has_rawpk:

646

622

gnutls_flags |= gnutls.ENABLE_RAWPK

647

gnutls.init(self, gnutls_flags)

623

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

648

624

del gnutls_flags

649

gnutls.set_default_priority(self)

650

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

651

gnutls.handshake_set_private_extensions(self, True)

625

gnutls.set_default_priority(self._c_object)

626

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

627

gnutls.handshake_set_private_extensions(self._c_object,

628

True)

652

629

self.socket = socket

653

630

if credentials is None:

654

631

credentials = gnutls.Credentials()

655

gnutls.credentials_set(self, credentials.type,

656

credentials)

632

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

633

ctypes.cast(credentials._c_object,

634

ctypes.c_void_p))

657

635

self.credentials = credentials

658

636

659

637

def __del__(self):

660

gnutls.deinit(self)

638

gnutls.deinit(self._c_object)

661

639

662

640

def handshake(self):

663

return gnutls.handshake(self)

641

return gnutls.handshake(self._c_object)

664

642

665

643

def send(self, data):

666

644

data = bytes(data)

667

645

data_len = len(data)

668

646

while data_len > 0:

669

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

647

data_len -= gnutls.record_send(self._c_object,

648

data[-data_len:],

670

649

data_len)

671

650

672

651

def bye(self):

673

return gnutls.bye(self, gnutls.SHUT_RDWR)

652

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

674

653

675

654

# Error handling functions

676

655

def _error_code(result):

677

656

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

678

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

679

if result >= gnutls.E_SUCCESS:

657

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

658

if result >= 0:

680

659

return result

681

660

if result == gnutls.E_NO_CERTIFICATE_FOUND:

682

661

raise gnutls.CertificateSecurityError(code=result)

683

662

raise gnutls.Error(code=result)

684

663

685

def _retry_on_error(result, func, arguments,

686

_error_code=_error_code):

664

def _retry_on_error(result, func, arguments):

687

665

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

688

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

689

while result < gnutls.E_SUCCESS:

666

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

667

while result < 0:

690

668

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

691

669

return _error_code(result)

692

670

result = func(*arguments)

697

675

698

676

# Functions

699

677

priority_set_direct = _library.gnutls_priority_set_direct

700

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

678

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

701

679

ctypes.POINTER(ctypes.c_char_p)]

702

680

priority_set_direct.restype = _error_code

703

681

704

682

init = _library.gnutls_init

705

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

683

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

706

684

init.restype = _error_code

707

685

708

686

set_default_priority = _library.gnutls_set_default_priority

709

set_default_priority.argtypes = [ClientSession]

687

set_default_priority.argtypes = [session_t]

710

688

set_default_priority.restype = _error_code

711

689

712

690

record_send = _library.gnutls_record_send

713

record_send.argtypes = [ClientSession, ctypes.c_void_p,

691

record_send.argtypes = [session_t, ctypes.c_void_p,

714

692

ctypes.c_size_t]

715

693

record_send.restype = ctypes.c_ssize_t

716

694

record_send.errcheck = _retry_on_error

718

696

certificate_allocate_credentials = (

719

697

_library.gnutls_certificate_allocate_credentials)

720

698

certificate_allocate_credentials.argtypes = [

721

PointerTo(Credentials)]

699

ctypes.POINTER(certificate_credentials_t)]

722

700

certificate_allocate_credentials.restype = _error_code

723

701

724

702

certificate_free_credentials = (

725

703

_library.gnutls_certificate_free_credentials)

726

certificate_free_credentials.argtypes = [Credentials]

704

certificate_free_credentials.argtypes = [

705

certificate_credentials_t]

727

706

certificate_free_credentials.restype = None

728

707

729

708

handshake_set_private_extensions = (

730

709

_library.gnutls_handshake_set_private_extensions)

731

handshake_set_private_extensions.argtypes = [ClientSession,

710

handshake_set_private_extensions.argtypes = [session_t,

732

711

ctypes.c_int]

733

712

handshake_set_private_extensions.restype = None

734

713

735

714

credentials_set = _library.gnutls_credentials_set

736

credentials_set.argtypes = [ClientSession, credentials_type_t,

737

CastToVoidPointer(Credentials)]

715

credentials_set.argtypes = [session_t, credentials_type_t,

716

ctypes.c_void_p]

738

717

credentials_set.restype = _error_code

739

718

740

719

strerror = _library.gnutls_strerror

742

721

strerror.restype = ctypes.c_char_p

743

722

744

723

certificate_type_get = _library.gnutls_certificate_type_get

745

certificate_type_get.argtypes = [ClientSession]

724

certificate_type_get.argtypes = [session_t]

746

725

certificate_type_get.restype = _error_code

747

726

748

727

certificate_get_peers = _library.gnutls_certificate_get_peers

749

certificate_get_peers.argtypes = [ClientSession,

728

certificate_get_peers.argtypes = [session_t,

750

729

ctypes.POINTER(ctypes.c_uint)]

751

730

certificate_get_peers.restype = ctypes.POINTER(datum_t)

752

731

759

738

global_set_log_function.restype = None

760

739

761

740

deinit = _library.gnutls_deinit

762

deinit.argtypes = [ClientSession]

741

deinit.argtypes = [session_t]

763

742

deinit.restype = None

764

743

765

744

handshake = _library.gnutls_handshake

766

handshake.argtypes = [ClientSession]

767

handshake.restype = ctypes.c_int

745

handshake.argtypes = [session_t]

746

handshake.restype = _error_code

768

747

handshake.errcheck = _retry_on_error

769

748

770

749

transport_set_ptr = _library.gnutls_transport_set_ptr

771

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

750

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

772

751

transport_set_ptr.restype = None

773

752

774

753

bye = _library.gnutls_bye

775

bye.argtypes = [ClientSession, close_request_t]

776

bye.restype = ctypes.c_int

754

bye.argtypes = [session_t, close_request_t]

755

bye.restype = _error_code

777

756

bye.errcheck = _retry_on_error

778

757

779

758

check_version = _library.gnutls_check_version

853

832

854

833

if check_version(b"3.6.4"):

855

834

certificate_type_get2 = _library.gnutls_certificate_type_get2

856

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

835

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

857

836

certificate_type_get2.restype = _error_code

858

837

859

838

# Remove non-public functions

875

854

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

876

855

877

856

Attributes:

878

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

857

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

879

858

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

880

859

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

881

860

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

882

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

861

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

883

862

running.

884

863

checker_callback_tag: a GLib event source tag, or None

885

864

checker_command: string; External command which is run to check

1009

988

self.last_enabled = None

1010

989

self.expires = None

1011

990

1012

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

1013

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

1014

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

991

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

992

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

993

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

1015

994

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

1016

995

datetime.datetime.utcnow())

1017

996

1056

1035

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

1057

1036

return False

1058

1037

if not quiet:

1059

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

1038

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

1060

1039

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

1061

1040

GLib.source_remove(self.disable_initiator_tag)

1062

1041

self.disable_initiator_tag = None

1106

1085

self.last_checker_status = returncode

1107

1086

self.last_checker_signal = None

1108

1087

if self.last_checker_status == 0:

1109

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

1088

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

1089

vars(self))

1110

1090

self.checked_ok()

1111

1091

else:

1112

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

1092

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

1113

1093

else:

1114

1094

self.last_checker_status = -1

1115

1095

self.last_checker_signal = -returncode

1116

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

1096

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

1097

vars(self))

1117

1098

return False

1118

1099

1119

1100

def checked_ok(self):

1153

1134

# should be.

1154

1135

1155

1136

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

1156

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

1137

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

1157

1138

self.checker.join()

1158

1139

self.checker = None

1159

1140

# Start a new checker if needed

1165

1146

try:

1166

1147

command = self.checker_command % escaped_attrs

1167

1148

except TypeError as error:

1168

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

1169

self.checker_command, exc_info=error)

1149

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

1150

self.checker_command,

1151

exc_info=error)

1170

1152

return True # Try again later

1171

1153

self.current_checker_command = command

1172

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

1154

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

1155

self.name)

1173

1156

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

1174

1157

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

1175

1158

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

1204

1187

self.checker_callback_tag = None

1205

1188

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

1206

1189

return

1207

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

1190

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

1208

1191

self.checker.terminate()

1209

1192

self.checker = None

1210

1193

1237

1220

func._dbus_name = func.__name__

1238

1221

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

1239

1222

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

1240

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1223

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1241

1224

return func

1242

1225

1243

1226

return decorator

1332

1315

1333

1316

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1334

1317

out_signature="s",

1335

path_keyword="object_path",

1336

connection_keyword="connection")

1318

path_keyword='object_path',

1319

connection_keyword='connection')

1337

1320

def Introspect(self, object_path, connection):

1338

1321

"""Overloading of standard D-Bus method.

1339

1322

1388

1371

document.unlink()

1389

1372

except (AttributeError, xml.dom.DOMException,

1390

1373

xml.parsers.expat.ExpatError) as error:

1391

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

1392

exc_info=error)

1374

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

1375

exc_info=error)

1393

1376

return xmlstring

1394

1377

1395

1378

1492

1475

1493

1476

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1494

1477

out_signature="s",

1495

path_keyword="object_path",

1496

connection_keyword="connection")

1478

path_keyword='object_path',

1479

connection_keyword='connection')

1497

1480

def Introspect(self, object_path, connection):

1498

1481

"""Overloading of standard D-Bus method.

1499

1482

1555

1538

document.unlink()

1556

1539

except (AttributeError, xml.dom.DOMException,

1557

1540

xml.parsers.expat.ExpatError) as error:

1558

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

1559

exc_info=error)

1541

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

1542

exc_info=error)

1560

1543

return xmlstring

1561

1544

1562

1545

1594

1577

1595

1578

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1596

1579

out_signature="s",

1597

path_keyword="object_path",

1598

connection_keyword="connection")

1580

path_keyword='object_path',

1581

connection_keyword='connection')

1599

1582

def Introspect(self, object_path, connection):

1600

1583

"""Overloading of standard D-Bus method.

1601

1584

1626

1609

document.unlink()

1627

1610

except (AttributeError, xml.dom.DOMException,

1628

1611

xml.parsers.expat.ExpatError) as error:

1629

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

1630

exc_info=error)

1612

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

1613

exc_info=error)

1631

1614

return xmlstring

1632

1615

1633

1616

2267

2250

class ProxyClient:

2268

2251

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

2269

2252

self._pipe = child_pipe

2270

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

2253

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

2271

2254

if not self._pipe.recv():

2272

2255

raise KeyError(key_id or fpr)

2273

2256

2274

2257

def __getattribute__(self, name):

2275

if name == "_pipe":

2258

if name == '_pipe':

2276

2259

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

2277

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

2260

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

2278

2261

data = self._pipe.recv()

2279

if data[0] == "data":

2262

if data[0] == 'data':

2280

2263

return data[1]

2281

if data[0] == "function":

2264

if data[0] == 'function':

2282

2265

2283

2266

def func(*args, **kwargs):

2284

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

2267

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

2285

2268

return self._pipe.recv()[1]

2286

2269

2287

2270

return func

2288

2271

2289

2272

def __setattr__(self, name, value):

2290

if name == "_pipe":

2273

if name == '_pipe':

2291

2274

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

2292

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

2275

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

2293

2276

2294

2277

2295

2278

class ClientHandler(socketserver.BaseRequestHandler, object):

2300

2283

2301

2284

def handle(self):

2302

2285

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

2303

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

2304

str(self.client_address))

2305

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

2286

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

2287

str(self.client_address))

2288

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

2289

self.server.child_pipe.fileno())

2306

2290

2307

2291

session = gnutls.ClientSession(self.request)

2308

2292

2309

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

2293

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

2310

2294

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

2311

2295

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

2312

2296

# "+DHE-DSS"))

2314

2298

priority = self.server.gnutls_priority

2315

2299

if priority is None:

2316

2300

priority = "NORMAL"

2317

gnutls.priority_set_direct(session,

2318

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

2301

gnutls.priority_set_direct(session._c_object,

2302

priority.encode("utf-8"),

2303

None)

2319

2304

2320

2305

# Start communication using the Mandos protocol

2321

2306

# Get protocol number

2322

2307

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

2323

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

2308

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

2324

2309

try:

2325

2310

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

2326

2311

raise RuntimeError(line)

2327

2312

except (ValueError, IndexError, RuntimeError) as error:

2328

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

2313

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

2329

2314

return

2330

2315

2331

2316

# Start GnuTLS connection

2332

2317

try:

2333

2318

session.handshake()

2334

2319

except gnutls.Error as error:

2335

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

2320

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

2336

2321

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

2337

2322

# established. Just abandon the request.

2338

2323

return

2339

log.debug("Handshake succeeded")

2324

logger.debug("Handshake succeeded")

2340

2325

2341

2326

approval_required = False

2342

2327

try:

2346

2331

key_id = self.key_id(

2347

2332

self.peer_certificate(session))

2348

2333

except (TypeError, gnutls.Error) as error:

2349

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

2334

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

2350

2335

return

2351

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

2352

key_id.decode("utf-8",

2353

errors="replace"))

2336

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

2354

2337

2355

2338

else:

2356

2339

key_id = b""

2358

2341

fpr = self.fingerprint(

2359

2342

self.peer_certificate(session))

2360

2343

except (TypeError, gnutls.Error) as error:

2361

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

2344

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

2362

2345

return

2363

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

2346

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

2364

2347

2365

2348

try:

2366

2349

client = ProxyClient(child_pipe, key_id, fpr,

2375

2358

2376

2359

while True:

2377

2360

if not client.enabled:

2378

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

2361

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

2362

client.name)

2379

2363

if self.server.use_dbus:

2380

2364

# Emit D-Bus signal

2381

2365

client.Rejected("Disabled")

2385

2369

# We are approved or approval is disabled

2386

2370

break

2387

2371

elif client.approved is None:

2388

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

2389

client.name)

2372

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

2373

client.name)

2390

2374

if self.server.use_dbus:

2391

2375

# Emit D-Bus signal

2392

2376

client.NeedApproval(

2393

2377

client.approval_delay.total_seconds()

2394

2378

* 1000, client.approved_by_default)

2395

2379

else:

2396

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

2397

client.name)

2380

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

2381

client.name)

2398

2382

if self.server.use_dbus:

2399

2383

# Emit D-Bus signal

2400

2384

client.Rejected("Denied")

2408

2392

time2 = datetime.datetime.now()

2409

2393

if (time2 - time) >= delay:

2410

2394

if not client.approved_by_default:

2411

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

2412

" waiting for approval",

2413

client.name)

2395

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

2396

" waiting for approval",

2397

client.name)

2414

2398

if self.server.use_dbus:

2415

2399

# Emit D-Bus signal

2416

2400

client.Rejected("Approval timed out")

2423

2407

try:

2424

2408

session.send(client.secret)

2425

2409

except gnutls.Error as error:

2426

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

2410

logger.warning("gnutls send failed",

2411

exc_info=error)

2427

2412

return

2428

2413

2429

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

2414

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

2430

2415

# bump the timeout using extended_timeout

2431

2416

client.bump_timeout(client.extended_timeout)

2432

2417

if self.server.use_dbus:

2439

2424

try:

2440

2425

session.bye()

2441

2426

except gnutls.Error as error:

2442

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

2427

logger.warning("GnuTLS bye failed",

2428

exc_info=error)

2443

2429

2444

2430

@staticmethod

2445

2431

def peer_certificate(session):

2446

2432

"Return the peer's certificate as a bytestring"

2447

2433

try:

2448

cert_type = gnutls.certificate_type_get2(

2449

session, gnutls.CTYPE_PEERS)

2434

cert_type = gnutls.certificate_type_get2(session._c_object,

2435

gnutls.CTYPE_PEERS)

2450

2436

except AttributeError:

2451

cert_type = gnutls.certificate_type_get(session)

2437

cert_type = gnutls.certificate_type_get(session._c_object)

2452

2438

if gnutls.has_rawpk:

2453

2439

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2454

2440

else:

2455

2441

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2456

2442

# If not a valid certificate type...

2457

2443

if cert_type not in valid_cert_types:

2458

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

2459

valid_cert_types)

2444

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

2445

valid_cert_types)

2460

2446

# ...return invalid data

2461

2447

return b""

2462

2448

list_size = ctypes.c_uint(1)

2463

2449

cert_list = (gnutls.certificate_get_peers

2464

(session, ctypes.byref(list_size)))

2450

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

2465

2451

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

2466

2452

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

2467

2453

if list_size.value == 0:

2581

2567

2582

2568

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2583

2569

socketserver.TCPServer):

2584

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

2570

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

2585

2571

2586

2572

Attributes:

2587

2573

enabled: Boolean; whether this server is activated yet

2638

2624

if SO_BINDTODEVICE is None:

2639

2625

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

2640

2626

# common enough.

2641

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

2627

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

2642

2628

SO_BINDTODEVICE = 25

2643

2629

try:

2644

2630

self.socket.setsockopt(

2646

2632

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

2647

2633

except socket.error as error:

2648

2634

if error.errno == errno.EPERM:

2649

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

2650

self.interface)

2635

logger.error("No permission to bind to"

2636

" interface %s", self.interface)

2651

2637

elif error.errno == errno.ENOPROTOOPT:

2652

log.error("SO_BINDTODEVICE not available; cannot"

2653

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

2638

logger.error("SO_BINDTODEVICE not available;"

2639

" cannot bind to interface %s",

2640

self.interface)

2654

2641

elif error.errno == errno.ENODEV:

2655

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

2656

" bind", self.interface)

2642

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

2643

" cannot bind", self.interface)

2657

2644

else:

2658

2645

raise

2659

2646

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

2738

2725

request = parent_pipe.recv()

2739

2726

command = request[0]

2740

2727

2741

if command == "init":

2728

if command == 'init':

2742

2729

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

2743

2730

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

2744

2731

address = request[3]

2754

2741

client = c

2755

2742

break

2756

2743

else:

2757

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

2758

" %s", key_id or fpr, address)

2744

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

2745

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

2759

2746

if self.use_dbus:

2760

2747

# Emit D-Bus signal

2761

2748

mandos_dbus_service.ClientNotFound(key_id or fpr,

2774

2761

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

2775

2762

# same fileno

2776

2763

return False

2777

if command == "funcall":

2764

if command == 'funcall':

2778

2765

funcname = request[1]

2779

2766

args = request[2]

2780

2767

kwargs = request[3]

2781

2768

2782

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

2769

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

2783

2770

funcname)(*args,

2784

2771

**kwargs)))

2785

2772

2786

if command == "getattr":

2773

if command == 'getattr':

2787

2774

attrname = request[1]

2788

2775

if isinstance(client_object.__getattribute__(attrname),

2789

2776

collections.abc.Callable):

2790

parent_pipe.send(("function", ))

2777

parent_pipe.send(('function', ))

2791

2778

else:

2792

2779

parent_pipe.send((

2793

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

2780

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

2794

2781

2795

if command == "setattr":

2782

if command == 'setattr':

2796

2783

attrname = request[1]

2797

2784

value = request[2]

2798

2785

setattr(client_object, attrname, value)

2904

2891

def string_to_delta(interval):

2905

2892

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

2906

2893

2907

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

2908

True

2909

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

2910

True

2911

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

2912

True

2913

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

2914

True

2915

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

2916

True

2917

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

2894

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

2895

True

2896

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

2897

True

2898

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

2899

True

2900

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

2901

True

2902

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

2903

True

2904

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

2918

2905

True

2919

2906

"""

2920

2907

3124

3111

3125

3112

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

3126

3113

syslogger.setFormatter(

3127

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

3128

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

3114

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

3115

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

3129

3116

server_settings["servicename"])))

3130

3117

3131

3118

# Parse config file with clients

3155

3142

try:

3156

3143

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

3157

3144

except IOError as e:

3158

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

3159

exc_info=e)

3145

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

3146

exc_info=e)

3160

3147

3161

3148

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

3162

3149

("mandos", "mandos"),

3173

3160

try:

3174

3161

os.setgid(gid)

3175

3162

os.setuid(uid)

3176

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

3163

if debug:

3164

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

3165

gid))

3177

3166

except OSError as error:

3178

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

3179

os.strerror(error.errno))

3167

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

3168

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

3180

3169

if error.errno != errno.EPERM:

3181

3170

raise

3182

3171

3189

3178

3190

3179

@gnutls.log_func

3191

3180

def debug_gnutls(level, string):

3192

log.debug("GnuTLS: %s",

3193

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

3181

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

3194

3182

3195

3183

gnutls.global_set_log_function(debug_gnutls)

3196

3184

3225

3213

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

3226

3214

do_not_queue=True)

3227

3215

except dbus.exceptions.DBusException as e:

3228

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

3216

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

3229

3217

use_dbus = False

3230

3218

server_settings["use_dbus"] = False

3231

3219

tcp_server.use_dbus = False

3316

3304

os.remove(stored_state_path)

3317

3305

except IOError as e:

3318

3306

if e.errno == errno.ENOENT:

3319

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

3320

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

3307

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

3308

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

3321

3309

else:

3322

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

3323

exc_info=e)

3310

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

3311

exc_info=e)

3324

3312

raise

3325

3313

except EOFError as e:

3326

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

3327

exc_info=e)

3314

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

3315

"EOFError:",

3316

exc_info=e)

3328

3317

3329

3318

with PGPEngine() as pgp:

3330

3319

for client_name, client in clients_data.items():

3357

3346

if client["enabled"]:

3358

3347

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

3359

3348

if not client["last_checked_ok"]:

3360

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

3361

" never performed a successful"

3362

" checker", client_name)

3349

logger.warning(

3350

"disabling client {} - Client never "

3351

"performed a successful checker".format(

3352

client_name))

3363

3353

client["enabled"] = False

3364

3354

elif client["last_checker_status"] != 0:

3365

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

3366

" last checker failed with error"

3367

" code %s", client_name,

3368

client["last_checker_status"])

3355

logger.warning(

3356

"disabling client {} - Client last"

3357

" checker failed with error code"

3358

" {}".format(

3359

client_name,

3360

client["last_checker_status"]))

3369

3361

client["enabled"] = False

3370

3362

else:

3371

3363

client["expires"] = (

3372

3364

datetime.datetime.utcnow()

3373

3365

+ client["timeout"])

3374

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

3375

" enabled", client_name)

3366

logger.debug("Last checker succeeded,"

3367

" keeping {} enabled".format(

3368

client_name))

3376

3369

try:

3377

3370

client["secret"] = pgp.decrypt(

3378

3371

client["encrypted_secret"],

3379

3372

client_settings[client_name]["secret"])

3380

3373

except PGPError:

3381

3374

# If decryption fails, we use secret from new settings

3382

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

3383

client_name)

3375

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

3376

client_name))

3384

3377

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

3385

3378

["secret"])

3386

3379

3400

3393

server_settings=server_settings)

3401

3394

3402

3395

if not tcp_server.clients:

3403

log.warning("No clients defined")

3396

logger.warning("No clients defined")

3404

3397

3405

3398

if not foreground:

3406

3399

if pidfile is not None:

3409

3402

with pidfile:

3410

3403

print(pid, file=pidfile)

3411

3404

except IOError:

3412

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

3413

pidfilename, pid)

3405

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

3406

pidfilename, pid)

3414

3407

del pidfile

3415

3408

del pidfilename

3416

3409

3566

3559

3567

3560

try:

3568

3561

with tempfile.NamedTemporaryFile(

3569

mode="wb",

3562

mode='wb',

3570

3563

suffix=".pickle",

3571

prefix="clients-",

3564

prefix='clients-',

3572

3565

dir=os.path.dirname(stored_state_path),

3573

3566

delete=False) as stored_state:

3574

3567

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

3582

3575

except NameError:

3583

3576

pass

3584

3577

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

3585

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

3586

os.strerror(e.errno))

3578

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

3579

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

3587

3580

else:

3588

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

3589

exc_info=e)

3581

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

3582

exc_info=e)

3590

3583

raise

3591

3584

3592

3585

# Delete all clients, and settings from config

3618

3611

if zeroconf:

3619

3612

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

3620

3613

if use_ipv6:

3621

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

3622

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

3614

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

3615

" flowinfo %d, scope_id %d",

3616

*tcp_server.socket.getsockname())

3623

3617

else: # IPv4

3624

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

3625

*tcp_server.socket.getsockname())

3618

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

3619

*tcp_server.socket.getsockname())

3626

3620

3627

3621

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

3628

3622

3632

3626

try:

3633

3627

service.activate()

3634

3628

except dbus.exceptions.DBusException as error:

3635

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

3629

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

3636

3630

cleanup()

3637

3631

sys.exit(1)

3638

3632

# End of Avahi example code

3643

3637

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

3644

3638

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

3645

3639

3646

log.debug("Starting main loop")

3640

logger.debug("Starting main loop")

3647

3641

main_loop.run()

3648

3642

except AvahiError as error:

3649

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

3643

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

3650

3644

cleanup()

3651

3645

sys.exit(1)

3652

3646

except KeyboardInterrupt:

3653

3647

if debug:

3654

3648

print("", file=sys.stderr)

3655

log.debug("Server received KeyboardInterrupt")

3656

log.debug("Server exiting")

3649

logger.debug("Server received KeyboardInterrupt")

3650

logger.debug("Server exiting")

3657

3651

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

3658

3652

cleanup()

3659

3653

3660

3654

3661

3655

def should_only_run_tests():

3662

3656

parser = argparse.ArgumentParser(add_help=False)

3663

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

3657

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

3664

3658

args, unknown_args = parser.parse_known_args()

3665

3659

run_tests = args.check

3666

3660

if run_tests:

3674

3668

tests.addTests(doctest.DocTestSuite())

3675

3669

return tests

3676

3670

3677

if __name__ == "__main__":

3671

if __name__ == '__main__':

3678

3672

try:

3679

3673

if should_only_run_tests():

3680

3674

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