util.crypto: Use Lua 5.2 API for predictable buffer size In Lua 5.3 LUAL_BUFFERSIZE is a macro computed from sizeof and is thus not known at pre-processing time, so this does not work. Since Lua 5.1 is no longer supported, we can use luaL_prepbuffsize() which is available from Lua 5.2

-- Unknown platform stub
module:set_global();

-- TODO Do things that make sense if we don't know about the platform