MD5/SHA1 to manually match SS?

[twh1st]

Hi there,

I know there is an option to manually match missing MD5s using "-missing" and the "-hash_file" options.
To my understandings, the -hash_file only supports manual mapping to GDB / GamesDB IDs.
Is it possible to extend it to SS / ScreenScraper.fr?

How is the hash using "-missing" generated anyway? It doesn't seem to be any of CRC32,MD5,SHA1.