/mandos/trunk : revision 237.4.68

1

#!/usr/bin/python2.7

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#!/usr/bin/python

2

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

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#

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

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

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#

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# Everything else is

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#

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

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

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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try:

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import ConfigParser as configparser

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except ImportError:

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import dbus

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import dbus.service

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try:

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import gobject

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from gi.repository import GObject

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except ImportError:

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from gi.repository import GObject as gobject

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import gobject as GObject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.1"

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version = "1.7.4"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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.format(self.name)))

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return ret

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# Pretend that we have a GnuTLS module

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class GnuTLS(object):

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

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

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_library = ctypes.cdll.LoadLibrary(

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ctypes.util.find_library("gnutls"))

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_need_version = "3.3.0"

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def __init__(self):

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

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

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# happens.

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

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

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.format(self._need_version))

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# Unless otherwise indicated, the constants and types below are

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

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# Constants

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E_SUCCESS = 0

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E_INTERRUPTED = -52

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E_AGAIN = -28

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CRT_OPENPGP = 2

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CLIENT = 2

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SHUT_RDWR = 0

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CRD_CERTIFICATE = 1

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E_NO_CERTIFICATE_FOUND = -49

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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

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# Types

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class session_int(ctypes.Structure):

475

_fields_ = []

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session_t = ctypes.POINTER(session_int)

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class certificate_credentials_st(ctypes.Structure):

478

_fields_ = []

479

certificate_credentials_t = ctypes.POINTER(

480

certificate_credentials_st)

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certificate_type_t = ctypes.c_int

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class datum_t(ctypes.Structure):

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

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('size', ctypes.c_uint)]

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class openpgp_crt_int(ctypes.Structure):

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_fields_ = []

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openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

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

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credentials_type_t = ctypes.c_int

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transport_ptr_t = ctypes.c_void_p

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close_request_t = ctypes.c_int

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# Exceptions

495

class Error(Exception):

496

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

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# exception might be raised from within GnuTLS.__init__,

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

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# global variable has happened.

500

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

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

502

# code is passed, convert it to a string with

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# gnutls.strerror()

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self.code = code

505

if message is None and code is not None:

506

message = GnuTLS.strerror(code)

507

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

508

message, *args)

509

510

class CertificateSecurityError(Error):

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pass

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# Classes

514

class Credentials(object):

515

def __init__(self):

516

self._c_object = gnutls.certificate_credentials_t()

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gnutls.certificate_allocate_credentials(

518

ctypes.byref(self._c_object))

519

self.type = gnutls.CRD_CERTIFICATE

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521

def __del__(self):

522

gnutls.certificate_free_credentials(self._c_object)

523

524

class ClientSession(object):

525

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

526

self._c_object = gnutls.session_t()

527

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

528

gnutls.set_default_priority(self._c_object)

529

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

530

gnutls.handshake_set_private_extensions(self._c_object,

531

True)

532

self.socket = socket

533

if credentials is None:

534

credentials = gnutls.Credentials()

535

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

536

ctypes.cast(credentials._c_object,

537

ctypes.c_void_p))

538

self.credentials = credentials

539

540

def __del__(self):

541

gnutls.deinit(self._c_object)

542

543

def handshake(self):

544

return gnutls.handshake(self._c_object)

545

546

def send(self, data):

547

data = bytes(data)

548

data_len = len(data)

549

while data_len > 0:

550

data_len -= gnutls.record_send(self._c_object,

551

data[-data_len:],

552

data_len)

553

554

def bye(self):

555

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

556

557

# Error handling functions

558

def _error_code(result):

559

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

560

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

561

if result >= 0:

562

return result

563

if result == gnutls.E_NO_CERTIFICATE_FOUND:

564

raise gnutls.CertificateSecurityError(code = result)

565

raise gnutls.Error(code = result)

566

567

def _retry_on_error(result, func, arguments):

568

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

569

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

570

while result < 0:

571

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

572

return _error_code(result)

573

result = func(*arguments)

574

return result

575

576

# Unless otherwise indicated, the function declarations below are

577

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

578

579

# Functions

580

priority_set_direct = _library.gnutls_priority_set_direct

581

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

582

ctypes.POINTER(ctypes.c_char_p)]

583

priority_set_direct.restype = _error_code

584

585

init = _library.gnutls_init

586

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

587

init.restype = _error_code

588

589

set_default_priority = _library.gnutls_set_default_priority

590

set_default_priority.argtypes = [session_t]

591

set_default_priority.restype = _error_code

592

593

record_send = _library.gnutls_record_send

594

record_send.argtypes = [session_t, ctypes.c_void_p,

595

ctypes.c_size_t]

596

record_send.restype = ctypes.c_ssize_t

597

record_send.errcheck = _retry_on_error

598

599

certificate_allocate_credentials = (

600

_library.gnutls_certificate_allocate_credentials)

601

certificate_allocate_credentials.argtypes = [

602

ctypes.POINTER(certificate_credentials_t)]

603

certificate_allocate_credentials.restype = _error_code

604

605

certificate_free_credentials = (

606

_library.gnutls_certificate_free_credentials)

607

certificate_free_credentials.argtypes = [certificate_credentials_t]

608

certificate_free_credentials.restype = None

609

610

handshake_set_private_extensions = (

611

_library.gnutls_handshake_set_private_extensions)

612

handshake_set_private_extensions.argtypes = [session_t,

613

ctypes.c_int]

614

handshake_set_private_extensions.restype = None

615

616

credentials_set = _library.gnutls_credentials_set

617

credentials_set.argtypes = [session_t, credentials_type_t,

618

ctypes.c_void_p]

619

credentials_set.restype = _error_code

620

621

strerror = _library.gnutls_strerror

622

strerror.argtypes = [ctypes.c_int]

623

strerror.restype = ctypes.c_char_p

624

625

certificate_type_get = _library.gnutls_certificate_type_get

626

certificate_type_get.argtypes = [session_t]

627

certificate_type_get.restype = _error_code

628

629

certificate_get_peers = _library.gnutls_certificate_get_peers

630

certificate_get_peers.argtypes = [session_t,

631

ctypes.POINTER(ctypes.c_uint)]

632

certificate_get_peers.restype = ctypes.POINTER(datum_t)

633

634

global_set_log_level = _library.gnutls_global_set_log_level

635

global_set_log_level.argtypes = [ctypes.c_int]

636

global_set_log_level.restype = None

637

638

global_set_log_function = _library.gnutls_global_set_log_function

639

global_set_log_function.argtypes = [log_func]

640

global_set_log_function.restype = None

641

642

deinit = _library.gnutls_deinit

643

deinit.argtypes = [session_t]

644

deinit.restype = None

645

646

handshake = _library.gnutls_handshake

647

handshake.argtypes = [session_t]

648

handshake.restype = _error_code

649

handshake.errcheck = _retry_on_error

650

651

transport_set_ptr = _library.gnutls_transport_set_ptr

652

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

653

transport_set_ptr.restype = None

654

655

bye = _library.gnutls_bye

656

bye.argtypes = [session_t, close_request_t]

657

bye.restype = _error_code

658

bye.errcheck = _retry_on_error

659

660

check_version = _library.gnutls_check_version

661

check_version.argtypes = [ctypes.c_char_p]

662

check_version.restype = ctypes.c_char_p

663

664

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

665

666

openpgp_crt_init = _library.gnutls_openpgp_crt_init

667

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

668

openpgp_crt_init.restype = _error_code

669

670

openpgp_crt_import = _library.gnutls_openpgp_crt_import

671

openpgp_crt_import.argtypes = [openpgp_crt_t,

672

ctypes.POINTER(datum_t),

673

openpgp_crt_fmt_t]

674

openpgp_crt_import.restype = _error_code

675

676

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

677

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

678

ctypes.POINTER(ctypes.c_uint)]

679

openpgp_crt_verify_self.restype = _error_code

680

681

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

682

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

683

openpgp_crt_deinit.restype = None

684

685

openpgp_crt_get_fingerprint = (

686

_library.gnutls_openpgp_crt_get_fingerprint)

687

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

688

ctypes.c_void_p,

689

ctypes.POINTER(

690

ctypes.c_size_t)]

691

openpgp_crt_get_fingerprint.restype = _error_code

692

693

# Remove non-public functions

694

del _error_code, _retry_on_error

695

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

696

gnutls = GnuTLS()

697

438

698

def call_pipe(connection, # : multiprocessing.Connection

439

699

func, *args, **kwargs):

440

700

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

455

715

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

456

716

to see if the client lives.

457

717

'None' if no process is running.

458

checker_callback_tag: a gobject event source tag, or None

718

checker_callback_tag: a GObject event source tag, or None

459

719

checker_command: string; External command which is run to check

460

720

if client lives. %() expansions are done at

461

721

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

462

722

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

463

checker_initiator_tag: a gobject event source tag, or None

723

checker_initiator_tag: a GObject event source tag, or None

464

724

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

465

725

client_structure: Object describing what attributes a client has

466

726

and is used for storing the client at exit

467

727

current_checker_command: string; current running checker_command

468

disable_initiator_tag: a gobject event source tag, or None

728

disable_initiator_tag: a GObject event source tag, or None

469

729

enabled: bool()

470

730

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

471

731

uniquely identify the client

625

885

if not quiet:

626

886

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

627

887

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

628

gobject.source_remove(self.disable_initiator_tag)

888

GObject.source_remove(self.disable_initiator_tag)

629

889

self.disable_initiator_tag = None

630

890

self.expires = None

631

891

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

632

gobject.source_remove(self.checker_initiator_tag)

892

GObject.source_remove(self.checker_initiator_tag)

633

893

self.checker_initiator_tag = None

634

894

self.stop_checker()

635

895

self.enabled = False

636

896

if not quiet:

637

897

self.send_changedstate()

638

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

898

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

639

899

return False

640

900

641

901

def __del__(self):

645

905

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

646

906

# and every interval from then on.

647

907

if self.checker_initiator_tag is not None:

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

908

GObject.source_remove(self.checker_initiator_tag)

909

self.checker_initiator_tag = GObject.timeout_add(

650

910

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

651

911

self.start_checker)

652

912

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

653

913

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

914

GObject.source_remove(self.disable_initiator_tag)

915

self.disable_initiator_tag = GObject.timeout_add(

656

916

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

657

917

# Also start a new checker *right now*.

658

918

self.start_checker()

694

954

if timeout is None:

695

955

timeout = self.timeout

696

956

if self.disable_initiator_tag is not None:

697

gobject.source_remove(self.disable_initiator_tag)

957

GObject.source_remove(self.disable_initiator_tag)

698

958

self.disable_initiator_tag = None

699

959

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

700

self.disable_initiator_tag = gobject.timeout_add(

960

self.disable_initiator_tag = GObject.timeout_add(

701

961

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

702

962

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

703

963

758

1018

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

759

1019

kwargs = popen_args)

760

1020

self.checker.start()

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

1021

self.checker_callback_tag = GObject.io_add_watch(

1022

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

763

1023

self.checker_callback, pipe[0], command)

764

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

1024

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

765

1025

return True

766

1026

767

1027

def stop_checker(self):

768

1028

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

769

1029

if self.checker_callback_tag:

770

gobject.source_remove(self.checker_callback_tag)

1030

GObject.source_remove(self.checker_callback_tag)

771

1031

self.checker_callback_tag = None

772

1032

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

773

1033

return

1547

1807

1548

1808

def approve(self, value=True):

1549

1809

self.approved = value

1550

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

1810

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

1551

1811

* 1000), self._reset_approved)

1552

1812

self.send_changedstate()

1553

1813

1764

2024

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

1765

2025

is None):

1766

2026

return

1767

gobject.source_remove(self.disable_initiator_tag)

1768

self.disable_initiator_tag = gobject.timeout_add(

2027

GObject.source_remove(self.disable_initiator_tag)

2028

self.disable_initiator_tag = GObject.timeout_add(

1769

2029

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

1770

2030

self.disable)

1771

2031

1791

2051

return

1792

2052

if self.enabled:

1793

2053

# Reschedule checker run

1794

gobject.source_remove(self.checker_initiator_tag)

1795

self.checker_initiator_tag = gobject.timeout_add(

2054

GObject.source_remove(self.checker_initiator_tag)

2055

self.checker_initiator_tag = GObject.timeout_add(

1796

2056

value, self.start_checker)

1797

2057

self.start_checker() # Start one now, too

1798

2058

1880

2140

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

1881

2141

self.server.child_pipe.fileno())

1882

2142

1883

session = gnutls.connection.ClientSession(

1884

self.request, gnutls.connection .X509Credentials())

1885

1886

# Note: gnutls.connection.X509Credentials is really a

1887

# generic GnuTLS certificate credentials object so long as

1888

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

1889

# here despite using OpenPGP certificates.

2143

session = gnutls.ClientSession(self.request)

1890

2144

1891

2145

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

1892

2146

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

1896

2150

priority = self.server.gnutls_priority

1897

2151

if priority is None:

1898

2152

priority = "NORMAL"

1899

gnutls.library.functions.gnutls_priority_set_direct(

1900

session._c_object, priority, None)

2153

gnutls.priority_set_direct(session._c_object, priority,

2154

None)

1901

2155

1902

2156

# Start communication using the Mandos protocol

1903

2157

# Get protocol number

1913

2167

# Start GnuTLS connection

1914

2168

try:

1915

2169

session.handshake()

1916

except gnutls.errors.GNUTLSError as error:

2170

except gnutls.Error as error:

1917

2171

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

1918

2172

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

1919

2173

# established. Just abandon the request.

1925

2179

try:

1926

2180

fpr = self.fingerprint(

1927

2181

self.peer_certificate(session))

1928

except (TypeError,

1929

gnutls.errors.GNUTLSError) as error:

2182

except (TypeError, gnutls.Error) as error:

1930

2183

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

1931

2184

return

1932

2185

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

1990

2243

else:

1991

2244

delay -= time2 - time

1992

2245

1993

sent_size = 0

1994

while sent_size < len(client.secret):

1995

try:

1996

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

1997

except gnutls.errors.GNUTLSError as error:

1998

logger.warning("gnutls send failed",

1999

exc_info=error)

2000

return

2001

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

2002

len(client.secret) - (sent_size

2003

+ sent))

2004

sent_size += sent

2246

try:

2247

session.send(client.secret)

2248

except gnutls.Error as error:

2249

logger.warning("gnutls send failed",

2250

exc_info = error)

2251

return

2005

2252

2006

2253

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

2007

2254

# bump the timeout using extended_timeout

2015

2262

client.approvals_pending -= 1

2016

2263

try:

2017

2264

session.bye()

2018

except gnutls.errors.GNUTLSError as error:

2265

except gnutls.Error as error:

2019

2266

logger.warning("GnuTLS bye failed",

2020

2267

exc_info=error)

2021

2268

2023

2270

def peer_certificate(session):

2024

2271

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

2025

2272

# If not an OpenPGP certificate...

2026

if (gnutls.library.functions.gnutls_certificate_type_get(

2027

session._c_object)

2028

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

2029

# ...do the normal thing

2030

return session.peer_certificate

2273

if (gnutls.certificate_type_get(session._c_object)

2274

!= gnutls.CRT_OPENPGP):

2275

# ...return invalid data

2276

return b""

2031

2277

list_size = ctypes.c_uint(1)

2032

cert_list = (gnutls.library.functions

2033

.gnutls_certificate_get_peers

2278

cert_list = (gnutls.certificate_get_peers

2034

2279

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

2035

2280

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

2036

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

2037

" certificate")

2281

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

2038

2282

if list_size.value == 0:

2039

2283

return None

2040

2284

cert = cert_list[0]

2044

2288

def fingerprint(openpgp):

2045

2289

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2046

2290

# New GnuTLS "datum" with the OpenPGP public key

2047

datum = gnutls.library.types.gnutls_datum_t(

2291

datum = gnutls.datum_t(

2048

2292

ctypes.cast(ctypes.c_char_p(openpgp),

2049

2293

ctypes.POINTER(ctypes.c_ubyte)),

2050

2294

ctypes.c_uint(len(openpgp)))

2051

2295

# New empty GnuTLS certificate

2052

crt = gnutls.library.types.gnutls_openpgp_crt_t()

2053

gnutls.library.functions.gnutls_openpgp_crt_init(

2054

ctypes.byref(crt))

2296

crt = gnutls.openpgp_crt_t()

2297

gnutls.openpgp_crt_init(ctypes.byref(crt))

2055

2298

# Import the OpenPGP public key into the certificate

2056

gnutls.library.functions.gnutls_openpgp_crt_import(

2057

crt, ctypes.byref(datum),

2058

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2299

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

2300

gnutls.OPENPGP_FMT_RAW)

2059

2301

# Verify the self signature in the key

2060

2302

crtverify = ctypes.c_uint()

2061

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

2062

crt, 0, ctypes.byref(crtverify))

2303

gnutls.openpgp_crt_verify_self(crt, 0,

2304

ctypes.byref(crtverify))

2063

2305

if crtverify.value != 0:

2064

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2065

raise gnutls.errors.CertificateSecurityError(

2066

"Verify failed")

2306

gnutls.openpgp_crt_deinit(crt)

2307

raise gnutls.CertificateSecurityError("Verify failed")

2067

2308

# New buffer for the fingerprint

2068

2309

buf = ctypes.create_string_buffer(20)

2069

2310

buf_len = ctypes.c_size_t()

2070

2311

# Get the fingerprint from the certificate into the buffer

2071

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

2072

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

2312

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

2313

ctypes.byref(buf_len))

2073

2314

# Deinit the certificate

2074

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2315

gnutls.openpgp_crt_deinit(crt)

2075

2316

# Convert the buffer to a Python bytestring

2076

2317

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

2077

2318

# Convert the bytestring to hexadecimal notation

2221

2462

gnutls_priority GnuTLS priority string

2222

2463

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

2223

2464

2224

Assumes a gobject.MainLoop event loop.

2465

Assumes a GObject.MainLoop event loop.

2225

2466

"""

2226

2467

2227

2468

def __init__(self, server_address, RequestHandlerClass,

2252

2493

2253

2494

def add_pipe(self, parent_pipe, proc):

2254

2495

# Call "handle_ipc" for both data and EOF events

2255

gobject.io_add_watch(

2496

GObject.io_add_watch(

2256

2497

parent_pipe.fileno(),

2257

gobject.IO_IN | gobject.IO_HUP,

2498

GObject.IO_IN | GObject.IO_HUP,

2258

2499

functools.partial(self.handle_ipc,

2259

2500

parent_pipe = parent_pipe,

2260

2501

proc = proc))

2264

2505

proc = None,

2265

2506

client_object=None):

2266

2507

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

2267

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

2508

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

2268

2509

# Wait for other process to exit

2269

2510

proc.join()

2270

2511

return False

2291

2532

parent_pipe.send(False)

2292

2533

return False

2293

2534

2294

gobject.io_add_watch(

2535

GObject.io_add_watch(

2295

2536

parent_pipe.fileno(),

2296

gobject.IO_IN | gobject.IO_HUP,

2537

GObject.IO_IN | GObject.IO_HUP,

2297

2538

functools.partial(self.handle_ipc,

2298

2539

parent_pipe = parent_pipe,

2299

2540

proc = proc,

2681

2922

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

2682

2923

exc_info=e)

2683

2924

2684

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

2925

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

2926

("mandos", "mandos"),

2927

("nobody", "nogroup")):

2685

2928

try:

2686

2929

uid = pwd.getpwnam(name).pw_uid

2687

gid = pwd.getpwnam(name).pw_gid

2930

gid = pwd.getpwnam(group).pw_gid

2688

2931

break

2689

2932

except KeyError:

2690

2933

continue

2694

2937

try:

2695

2938

os.setgid(gid)

2696

2939

os.setuid(uid)

2940

if debug:

2941

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

2942

gid))

2697

2943

except OSError as error:

2944

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

2945

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

2698

2946

if error.errno != errno.EPERM:

2699

2947

raise

2700

2948

2703

2951

2704

2952

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

2705

2953

# - GnuTLS manual

2706

gnutls.library.functions.gnutls_global_set_log_level(11)

2954

gnutls.global_set_log_level(11)

2707

2955

2708

@gnutls.library.types.gnutls_log_func

2956

@gnutls.log_func

2709

2957

def debug_gnutls(level, string):

2710

2958

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

2711

2959

2712

gnutls.library.functions.gnutls_global_set_log_function(

2713

debug_gnutls)

2960

gnutls.global_set_log_function(debug_gnutls)

2714

2961

2715

2962

# Redirect stdin so all checkers get /dev/null

2716

2963

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

2723

2970

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

2724

2971

daemon()

2725

2972

2726

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

2727

# need to inform gobject that threads will be used.

2728

gobject.threads_init()

2973

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

2974

# need to inform GObject that threads will be used.

2975

GObject.threads_init()

2729

2976

2730

2977

global main_loop

2731

2978

# From the Avahi example code

2732

2979

DBusGMainLoop(set_as_default=True)

2733

main_loop = gobject.MainLoop()

2980

main_loop = GObject.MainLoop()

2734

2981

bus = dbus.SystemBus()

2735

2982

# End of Avahi example code

2736

2983

if use_dbus:

3064

3311

# Don't signal the disabling

3065

3312

client.disable(quiet=True)

3066

3313

# Emit D-Bus signal for removal

3067

mandos_dbus_service.client_removed_signal(client)

3314

if use_dbus:

3315

mandos_dbus_service.client_removed_signal(client)

3068

3316

client_settings.clear()

3069

3317

3070

3318

atexit.register(cleanup)

3104

3352

sys.exit(1)

3105

3353

# End of Avahi example code

3106

3354

3107

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

3355

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

3108

3356

lambda *args, **kwargs:

3109

3357

(tcp_server.handle_request

3110

3358

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