OSSL_PARAM_ALIGN_SIZE
total = OSSL_PARAM_ALIGN_SIZE * (p_blks + bld->total_blocks);
ss = OSSL_PARAM_ALIGN_SIZE * bld->secure_blocks;
return (bytes + OSSL_PARAM_ALIGN_SIZE - 1) / OSSL_PARAM_ALIGN_SIZE;
size_t sz = OSSL_PARAM_ALIGN_SIZE * (extra_blocks + out->blocks);