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/* Copyright (C) 1991-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <hurd.h>
#include <hurd/port.h>
#include <hurd/id.h>
#include <hurdlock.h>
#include "set-hooks.h"
/* Things in the library which want to be run when the auth port changes. */
DEFINE_HOOK (_hurd_reauth_hook, (auth_t new_auth));
static unsigned int reauth_lock = LLL_LOCK_INITIALIZER;
/* Set the auth port to NEW, and reauthenticate
everything used by the library. */
error_t
_hurd_setauth (auth_t new)
{
error_t err;
unsigned int d;
mach_port_t newport, ref;
/* Give the new send right a user reference.
This is a good way to check that it is valid. */
if (err = __mach_port_mod_refs (__mach_task_self (), new,
MACH_PORT_RIGHT_SEND, 1))
return err;
HURD_CRITICAL_BEGIN;
/* We lock against another thread doing setauth. Anyone who sets
_hurd_ports[INIT_PORT_AUTH] some other way is asking to lose. */
__mutex_lock (&reauth_lock);
/* Install the new port in the cell. */
__mutex_lock (&_hurd_id.lock);
_hurd_port_set (&_hurd_ports[INIT_PORT_AUTH], new);
_hurd_id.valid = 0;
if (_hurd_id.rid_auth)
{
__mach_port_deallocate (__mach_task_self (), _hurd_id.rid_auth);
_hurd_id.rid_auth = MACH_PORT_NULL;
}
__mutex_unlock (&_hurd_id.lock);
if (_hurd_init_dtable != NULL)
/* We just have the simple table we got at startup.
Otherwise, a reauth_hook in dtable.c takes care of this. */
for (d = 0; d < _hurd_init_dtablesize; ++d)
if (_hurd_init_dtable[d] != MACH_PORT_NULL)
{
mach_port_t new;
ref = __mach_reply_port ();
if (! __io_reauthenticate (_hurd_init_dtable[d],
ref, MACH_MSG_TYPE_MAKE_SEND)
&& ! HURD_PORT_USE (&_hurd_ports[INIT_PORT_AUTH],
__auth_user_authenticate
(port,
ref, MACH_MSG_TYPE_MAKE_SEND,
&new)))
{
__mach_port_deallocate (__mach_task_self (),
_hurd_init_dtable[d]);
_hurd_init_dtable[d] = new;
}
__mach_port_destroy (__mach_task_self (), ref);
}
ref = __mach_reply_port ();
if (__USEPORT (CRDIR,
! __io_reauthenticate (port,
ref, MACH_MSG_TYPE_MAKE_SEND)
&& ! __auth_user_authenticate (new,
ref, MACH_MSG_TYPE_MAKE_SEND,
&newport)))
_hurd_port_set (&_hurd_ports[INIT_PORT_CRDIR], newport);
__mach_port_destroy (__mach_task_self (), ref);
ref = __mach_reply_port ();
if (__USEPORT (CWDIR,
! __io_reauthenticate (port,
ref, MACH_MSG_TYPE_MAKE_SEND)
&& ! __auth_user_authenticate (new,
ref, MACH_MSG_TYPE_MAKE_SEND,
&newport)))
_hurd_port_set (&_hurd_ports[INIT_PORT_CWDIR], newport);
__mach_port_destroy (__mach_task_self (), ref);
/* Run things which want to do reauthorization stuff. */
RUN_HOOK (_hurd_reauth_hook, (new));
__mutex_unlock (&reauth_lock);
HURD_CRITICAL_END;
return 0;
}
int
__setauth (auth_t new)
{
error_t err = _hurd_setauth (new);
return err ? __hurd_fail (err) : 0;
}
weak_alias (__setauth, setauth)
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