#pragma once

#include <stddef.h>
#include <stdio.h>              /* debug */
#include <stdint.h>


#define TWEAK_LENGTH_BITS 192
#define KEY_LENGTH_BITS 128
#define ROUND_TWEAKEY_BITS 64


struct tweakey_state
{
    FILE* debug;
};

typedef struct tweakey_state tweakey_state;


void tweakey_state_init(
    tweakey_state *TK,
    const uint8_t key[KEY_LENGTH_BITS/8],
    const uint8_t tweak[TWEAK_LENGTH_BITS/8],
    FILE* debug
);

void tweakey_state_extract(
    const tweakey_state *TK,
    uint8_t round_tweakey[ROUND_TWEAKEY_BITS/8], /* output */
    uint8_t i                                    /* round constant */
);

void tweakey_state_update(tweakey_state *TK);