#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)auth_none.c 1.1 94/10/31 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 struct auth_ops *authnone_ops();

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

AUTH *
authnone_create()
{
	register struct authnone_private *ap = authnone_private;
	XDR xdr_stream;
	register 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 = authnone_ops();
		xdrs = &xdr_stream;
		xdrmem_create(xdrs, ap->marshalled_client,
			(u_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(client, xdrs)
	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()
{
}

static bool_t
authnone_validate()
{

	return (TRUE);
}

static bool_t
authnone_refresh()
{

	return (FALSE);
}

static void
authnone_destroy()
{
}

static struct auth_ops *
authnone_ops()
{
	static struct auth_ops ops;

	if (ops.ah_nextverf == NULL) {
		ops.ah_nextverf = authnone_verf;
		ops.ah_marshal = authnone_marshal;
		ops.ah_validate = authnone_validate;
		ops.ah_refresh = authnone_refresh;
		ops.ah_destroy = authnone_destroy;
	}
	return (&ops);
}