/*

 * 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.

 */

/*

 * auth_none.c

 * Creates a client authentication handle for passing "null"

 * credentials and verifiers to remote systems.

 */

#include <rpc/rpc.h>

#include <libc-lock.h>

#include <shlib-compat.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;

__libc_once_define(static, authnone_private_guard);

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)

{

  __libc_once (authnone_private_guard, authnone_create_once);

  return &authnone_private.no_client;

}

libc_hidden_nolink_sunrpc (authnone_create, GLIBC_2_0)

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)

{

}

static bool_t

authnone_validate (AUTH *auth, struct opaque_auth *oa)

{

  return TRUE;

}

static bool_t

authnone_refresh (AUTH *auth)

{

  return FALSE;

}

static void

authnone_destroy (AUTH *auth)

{

}