/*      $NetBSD: auth_none.c,v 1.16 2013/03/11 20:19:28 tron Exp $      */

/*
 * Copyright (c) 2010, Oracle America, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *     * Neither the name of the "Oracle America, Inc." nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char *sccsid = "@(#)auth_none.c 1.19 87/08/11 Copyr 1984 Sun Micro";
static char *sccsid = "@(#)auth_none.c  2.1 88/07/29 4.0 RPCSRC";
#else
__RCSID("$NetBSD: auth_none.c,v 1.16 2013/03/11 20:19:28 tron Exp $");
#endif
#endif

/*
 * auth_none.c
 * Creates a client authentication handle for passing "null" 
 * credentials and verifiers to remote systems. 
 * 
 * Copyright (C) 1984, Sun Microsystems, Inc. 
 */

#include "namespace.h"

#include <assert.h>
#include <stdlib.h>

#include <rpc/types.h>
#include <rpc/xdr.h>
#include <rpc/auth.h>

#ifdef __weak_alias
__weak_alias(authnone_create,_authnone_create)
#endif

#define MAX_MARSHAL_SIZE 20

/*
 * Authenticator operations routines
 */

static bool_t authnone_marshal(AUTH *, XDR *);
static void authnone_verf(AUTH *);
static bool_t authnone_validate(AUTH *, struct opaque_auth *);
static bool_t authnone_refresh(AUTH *);
static void authnone_destroy(AUTH *);

static const struct auth_ops ops = {
        authnone_verf,
        authnone_marshal,
        authnone_validate,
        authnone_refresh,
        authnone_destroy
};

static struct authnone_private {
        AUTH    no_client;
        char    marshalled_client[MAX_MARSHAL_SIZE];
        u_int   mcnt;
} *authnone_private;

AUTH *
authnone_create(void)
{
        struct authnone_private *ap = authnone_private;
        XDR xdr_stream;
        XDR *xdrs;

        if (ap == 0) {
                ap = (struct authnone_private *)calloc(1, sizeof (*ap));
                if (ap == 0)
                        return (0);
                authnone_private = ap;
        }
        if (!ap->mcnt) {
                ap->no_client.ah_cred = ap->no_client.ah_verf = _null_auth;
                ap->no_client.ah_ops = &ops;
                xdrs = &xdr_stream;
                xdrmem_create(xdrs, ap->marshalled_client,
                    (u_int)MAX_MARSHAL_SIZE, XDR_ENCODE);
                (void)xdr_opaque_auth(xdrs, &ap->no_client.ah_cred);
                (void)xdr_opaque_auth(xdrs, &ap->no_client.ah_verf);
                ap->mcnt = XDR_GETPOS(xdrs);
                XDR_DESTROY(xdrs);
        }
        return (&ap->no_client);
}

/*ARGSUSED*/
static bool_t
authnone_marshal(AUTH *client, XDR *xdrs)
{
        struct authnone_private *ap = authnone_private;

        _DIAGASSERT(xdrs != NULL);

        if (ap == 0)
                return (0);
        return ((*xdrs->x_ops->x_putbytes)(xdrs,
            ap->marshalled_client, ap->mcnt));
}

/*ARGSUSED*/
static void 
authnone_verf(AUTH *client)
{
}

/*ARGSUSED*/
static bool_t
authnone_validate(AUTH *client, struct opaque_auth *auth)
{

        return (TRUE);
}

/*ARGSUSED*/
static bool_t
authnone_refresh(AUTH *client)
{

        return (FALSE);
}

/*ARGSUSED*/
static void
authnone_destroy(AUTH *client)
{
}