3. SHA3-384: ⌊Keccak[r = 832, c = 768, d = 48]⌋384
4. SHA3-512: ⌊Keccak[r = 576, c = 1024, d = 64]⌋512
*/
+/*
void keccak_init(uint16_t r, keccak_ctx_t* ctx){
memset(ctx->a, 0x00, 5 * 5 * 8);
ctx->r = r;
void keccak512_init(keccak_ctx_t* ctx){
keccak_init( 576, ctx);
}
+
+*/