OPENSSL_store_u64_be
OPENSSL_store_u64_be(adrsc + SLH_ADRSC_OFF_TREE_ADR, in);
OPENSSL_store_u64_be(adrs + SLH_ADRS_OFF_TREE_ADR + 4, address);
restout = OPENSSL_store_u64_be(out, u64);