/*

 * Copyright (C) 2017 Red Hat, Inc.

 *

 * Author: Nikos Mavrogiannopoulos

 *

 * This file is part of GnuTLS.

 *

 * The GnuTLS is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public License

 * as published by the Free Software Foundation; either version 2.1 of

 * the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with this program.  If not, see <https://www.gnu.org/licenses/>

 *

 */

#include "gnutls_int.h"

#include "errors.h"

#include "hello_ext.h"

#include "handshake.h"

#include "mbuffers.h"

#include "tls13/encrypted_extensions.h"

int _gnutls13_recv_encrypted_extensions(gnutls_session_t session)

{

  int ret;

  gnutls_buffer_st buf;

  ret = _gnutls_recv_handshake(

    session, GNUTLS_HANDSHAKE_ENCRYPTED_EXTENSIONS, 0, &buf);

  if (ret < 0)

    return gnutls_assert_val(ret);

  _gnutls_handshake_log("HSK[%p]: parsing encrypted extensions\n",

            session);

  ret = _gnutls_parse_hello_extensions(session, GNUTLS_EXT_FLAG_EE,

               GNUTLS_EXT_ANY, buf.data,

               buf.length);

  _gnutls_buffer_clear(&buf);

  if (ret < 0)

    return gnutls_assert_val(ret);

  return 0;

}

int _gnutls13_send_encrypted_extensions(gnutls_session_t session,

          unsigned again)

{

  int ret;

  mbuffer_st *bufel = NULL;

  gnutls_buffer_st buf;

  if (again == 0) {

    ret = _gnutls_buffer_init_handshake_mbuffer(&buf);

    if (ret < 0)

      return gnutls_assert_val(ret);

    ret = _gnutls_gen_hello_extensions(

      session, &buf, GNUTLS_EXT_FLAG_EE, GNUTLS_EXT_ANY);

    if (ret < 0) {

      gnutls_assert();

      goto cleanup;

    }

    bufel = _gnutls_buffer_to_mbuffer(&buf);

  }

  return _gnutls_send_handshake(session, bufel,

              GNUTLS_HANDSHAKE_ENCRYPTED_EXTENSIONS);

cleanup:

  _gnutls_buffer_clear(&buf);

  return ret;

}