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

#include "rpc_private.h"


#define MAX_MARSHAL_SIZE 20

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

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

/* Internal data and routines */

struct authnone_private_s {
  AUTH no_client;
  char marshalled_client[MAX_MARSHAL_SIZE];
  u_int mcnt;
};

static struct authnone_private_s authnone_private;
#ifdef __UCLIBC_HAS_THREADS__
__libc_once_define(static, authnone_private_guard);
#endif

static void authnone_create_once (void);

static void
authnone_create_once (void)
{
  struct authnone_private_s *ap;
  XDR xdr_stream;
  XDR *xdrs;

  ap = &authnone_private;

  ap->no_client.ah_cred = ap->no_client.ah_verf = _null_auth;
  ap->no_client.ah_ops = (struct auth_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);
}

AUTH *
authnone_create (void)
{
#ifdef __UCLIBC_HAS_THREADS__
  __libc_once (authnone_private_guard, authnone_create_once);
#else
  authnone_create_once();
#endif
  return &authnone_private.no_client;
}
libc_hidden_def(authnone_create)

static bool_t
authnone_marshal (AUTH *client, XDR *xdrs)
{
  struct authnone_private_s *ap;

  /* authnone_create returned authnone_private->no_client, which is
     the first field of struct authnone_private_s.  */
  ap = (struct authnone_private_s *) client;
  if (ap == NULL)
    return FALSE;
  return (*xdrs->x_ops->x_putbytes) (xdrs, ap->marshalled_client, ap->mcnt);
}

static void
authnone_verf (AUTH *auth attribute_unused)
{
}

static bool_t
authnone_validate (AUTH *auth attribute_unused, struct opaque_auth *oa attribute_unused)
{
  return TRUE;
}

static bool_t
authnone_refresh (AUTH *auth attribute_unused)
{
  return FALSE;
}

static void
authnone_destroy (AUTH *auth attribute_unused)
{
}