SHAKE256_BLOCK_SIZE
.block_size = SHAKE256_BLOCK_SIZE,
#ifdef SHAKE256_BLOCK_SIZE
#if (MAX_BLOCK_SIZE < SHAKE256_BLOCK_SIZE)
#define MAX_BLOCK_SIZE SHAKE256_BLOCK_SIZE
ret = _shake_init(ctx, SHAKE256_DIGEST_SIZE, SHAKE256_BLOCK_SIZE); EG(ret, err);