SLH_WOTS_LEN_MAX
uint8_t tmp[SLH_WOTS_LEN_MAX * SLH_MAX_N];
uint8_t msg_and_csum_nibbles[SLH_WOTS_LEN_MAX]; /* size is >= 2 * n + 3 */
uint8_t msg_and_csum_nibbles[SLH_WOTS_LEN_MAX];
uint8_t tmp[SLH_WOTS_LEN_MAX * SLH_MAX_N];