#include <string.h>

#include "tweakey.h"


static void _dump_buffer(FILE *output, size_t len, const uint8_t buf[len], int indent)
{
    for (size_t line=0; line<len/8; line++)
    {
        fprintf(output, "%*s", indent, "");
        for (size_t b=0; b<8; b++)
        {
            /* start with MSB */
            size_t byte_index = len-(1+line*8+b);
            fprintf(output, "%*s", 5, "");
            fprintf(output, "%02x", buf[byte_index]);
        }
        fprintf(output, "\n");
    }
    fprintf(output, "\n");
}


void tweakey_state_init(
    tweakey_state *TK,
    const uint8_t key[KEY_BYTES],
    const uint8_t tweak[TWEAK_BYTES],
    FILE *debug
)
{
    memcpy(TK->TK,             tweak, TWEAK_BYTES);
    memcpy(TK->TK+TWEAK_BYTES, key,   KEY_BYTES);

    fprintf(debug, "     Tweak is :\n");
    _dump_buffer(debug, TWEAK_BYTES, tweak, 5);
    fprintf(debug, "     Key is :\n");
    _dump_buffer(debug, KEY_BYTES, key, 5);
    fprintf(debug, "     Tweakey is :\n");
    _dump_buffer(debug, sizeof(TK->TK), TK->TK, 5);
}


void tweakey_state_extract(
    __attribute__((unused)) const tweakey_state *TK,
    __attribute__((unused)) uint8_t round_tweakey[ROUND_TWEAKEY_BYTES], /* output */
    __attribute__((unused)) uint8_t i                                   /* round constant */
)
{
    
}


void tweakey_state_update(__attribute__((unused)) tweakey_state *TK)
{
    
}