#ifndef STAGE2_HEADERS_SEEN
//check header file for re-def conflicts

#define STAGE2_HEADERS_SEEN

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "mbedtls/config.h"

#include "mbedtls/aes.h"
#include "mbedtls/bignum.h"
#include "mbedtls/ctr_drbg.h"
#include "mbedtls/entropy.h"
#include "mbedtls/ecp.h"
#include "mbedtls/ecdh.h"
#include "mbedtls/ecdsa.h"
#include "mbedtls/hmac_drbg.h"
#include "mbedtls/hkdf.h"
#include "mbedtls/md.h"
#include "mbedtls/pk.h"
#include "mbedtls/rsa.h"
#include "mbedtls/sha1.h"
#include "mbedtls/sha256.h"

#include "mbedtls/net_sockets.h"


#include "defines.h"


#define SERVER_PORT "11999"
#define PLAINTEXT "==Hello there!=="
#define SERVER_ID		"0001"
#define CLIENT_ID		"0002"

////////typedefs


typedef struct 
{
	/*
	Use this struct to load, store and update client info on server side
	or both ways if mutual attestation is possible
	*/
	const char *			cli_ID;
	const char *			pub_file;
	mbedtls_ecp_point *		pub_key;
	int 					Cli_STATUS;
	int 					Cli_CAP;
	const uint8_t	*		NONCE;
	mbedtls_net_context *	cli_fd;

} Client_info;


typedef struct 
{
	/*
	Use this struct to load, store and update info about server on client
	*/
	const char *			ser_ID;
	const char *			pub_file;
	mbedtls_ecp_point *		pub_key;
	mbedtls_net_context *	ser_fd;
} Server_info;


typedef struct 
{
	//Use this struct to maintain uniformity between client and sever

	const char *			cli_ID;
	const uint8_t *			NONCE;
	const uint8_t *			sign;
	const size_t 			sig_len;

} Chall_context;


typedef struct 
{
	//Use this struct to maintain uniformity between client and sever

	const char *			cli_ID;
	const uint8_t *			NONCE;
	const uint8_t *			sign;
	const size_t 			sig_len;
} Resp_context;


///////////functions


DIMASTATUS load_nodes(Client_info * Cl_list);

DIMASTATUS genNONCE( Client_info * Cl_ctx);

DIMASTATUS challengeCl( mbedtls_pk_context * pk_ctx, Client_info * Cl_ctx, uint8_t *sign, size_t *signlen);
//DIMASTATUS challengeCTX( mbedtls_pk_context * pk_ctx, Client_info * Cl_ctx, Chall_context * ch_ctx);


DIMASTATUS verifyCl( mbedtls_pk_context * pk_ctx, Client_info * Cl_ctx, uint8_t *sign, size_t signlen);
//DIMASTATUS responseCTX( mbedtls_pk_context * pk_ctx, Client_info * Cl_ctx, Resp_context * resp_ctx);


DIMASTATUS responSer( mbedtls_pk_context * pk_ctx, Resp_context * Res_ctx, uint8_t *sign, size_t *signlen);

DIMASTATUS IIStepSend(unsigned char * outBuff, mbedtls_net_context * net_fd);

DIMASTATUS IIStepRecv(unsigned char * inBuff, mbedtls_net_context * net_fd);


#endif