/*

 * Copyright (C) 2000-2012 Free Software Foundation, 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 <http://www.gnu.org/licenses/>

 *

 */

#ifndef HANDSHAKE_H

#define HANDSHAKE_H

#include "errors.h"

int _gnutls_send_handshake(gnutls_session_t session, mbuffer_st * bufel,

			   gnutls_handshake_description_t type);

int _gnutls_recv_hello_request(gnutls_session_t session, void *data,

			       uint32_t data_size);

int _gnutls_recv_handshake(gnutls_session_t session,

			   gnutls_handshake_description_t type,

			   unsigned int optional, gnutls_buffer_st * buf);

int _gnutls_generate_session_id(uint8_t * session_id, uint8_t * len);

int _gnutls_set_server_random(gnutls_session_t session, uint8_t * rnd);

int _gnutls_set_client_random(gnutls_session_t session, uint8_t * rnd);

int _gnutls_find_pk_algos_in_ciphersuites(uint8_t * data, int datalen);

int _gnutls_server_select_suite(gnutls_session_t session, uint8_t * data,

				unsigned int datalen, unsigned int scsv_only);

int _gnutls_negotiate_version(gnutls_session_t session,

			      gnutls_protocol_t adv_version, uint8_t major, uint8_t minor);

int _gnutls_user_hello_func(gnutls_session_t session,

			    gnutls_protocol_t adv_version, uint8_t major, uint8_t minor);

void _gnutls_handshake_hash_buffers_clear(gnutls_session_t session);

#define STATE session->internals.handshake_state

#define FINAL_STATE session->internals.handshake_final_state

/* This returns true if we have got there

 * before (and not finished due to an interrupt).

 */

#define AGAIN(target) (STATE==target?1:0)

#define FAGAIN(target) (FINAL_STATE==target?1:0)

#define AGAIN2(state, target) (state==target?1:0)

inline static int handshake_remaining_time(gnutls_session_t session)

{

	if (session->internals.handshake_endtime) {

		struct timespec now;

		gettime(&now;;

		if (now.tv_sec < session->internals.handshake_endtime)

			return (session->internals.handshake_endtime -

				now.tv_sec) * 1000;

		else

			return gnutls_assert_val(GNUTLS_E_TIMEDOUT);

	}

	return 0;

}

int _gnutls_handshake_get_session_hash(gnutls_session_t session, gnutls_datum_t *shash);

int _gnutls_check_id_for_change(gnutls_session_t session);

int _gnutls_check_if_cert_hash_is_same(gnutls_session_t session, gnutls_certificate_credentials_t cred);

#endif