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