Aug 12, 2019 08:40 AM|PatriceSc|LINK
Done another response first as I missed you were hijacking an old discussion. It's likely best to open your own...
In short you can't. A hash function computes a quite short "thumbprint" value from a source input but you doesn't allow to retrieve the original value. For files it allows to download a file, do the same hash calculation and see if you get the same result
(which shows with a very high level of confidence that the file content was not altered).
See for example: www.differencebetween.info/difference-between-hashing-and-encryption
If you need further help I would suggest to open your own thread and explain what you are trying to do.