rt-thread-stm32f072/rt-thread/components/dfs/filesystems/nfs/rpc/auth_none.c

/*
 * Copyright (c) 2006-2021, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 */
/* @(#)auth_none.c  2.1 88/07/29 4.0 RPCSRC */
/*
 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
 * unrestricted use provided that this legend is included on all tape
 * media and as a part of the software program in whole or part.  Users
 * may copy or modify Sun RPC without charge, but are not authorized
 * to license or distribute it to anyone else except as part of a product or
 * program developed by the user.
 *
 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
 *
 * Sun RPC is provided with no support and without any obligation on the
 * part of Sun Microsystems, Inc. to assist in its use, correction,
 * modification or enhancement.
 *
 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
 * OR ANY PART THEREOF.
 *
 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
 * or profits or other special, indirect and consequential damages, even if
 * Sun has been advised of the possibility of such damages.
 *
 * Sun Microsystems, Inc.
 * 2550 Garcia Avenue
 * Mountain View, California  94043
 */
#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] =

    "@(#)auth_none.c 1.19 87/08/11 Copyr 1984 Sun Micro";
#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 <rpc/types.h>
#include <rpc/xdr.h>
#include <rpc/auth.h>
#define MAX_MARSHEL_SIZE 20

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 bool_t authnone_marshal(AUTH *client, XDR *xdrs);

struct opaque_auth _null_auth;

static 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_MARSHEL_SIZE];
    unsigned int mcnt;
} *authnone_private;

AUTH *authnone_create()
{
    register struct authnone_private *ap = authnone_private;
    XDR xdr_stream;
    register XDR *xdrs;
    extern bool_t xdr_opaque_auth(XDR *xdrs, struct opaque_auth *ap);

    if (ap == 0) {
        ap = (struct authnone_private *) rt_malloc (sizeof(*ap));
        if (ap == 0) return NULL;
        memset(ap, 0, sizeof(*ap));
        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,
                      (unsigned int) MAX_MARSHEL_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)
{
    register struct authnone_private *ap = authnone_private;

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

static void authnone_verf(AUTH *x)
{
}

static bool_t authnone_validate(AUTH *x, struct opaque_auth *x1)
{

    return (TRUE);
}

static bool_t authnone_refresh(AUTH *x)
{

    return (FALSE);
}

static void authnone_destroy(AUTH *x)
{
}