How can we find the checksum of a given .img file?

[Popolechien]

We produce .img files on a monthly basis (e.g. prepper or demo images) and folks might be interested in getting the checksum.

For zim files, this can be easily found by looking at zimname.zim.sha256 on the download.kiwix.org folder. Is there anything similar for images? I tried for instance https://org-kiwix-hotspot-cardshop-download.s3.us-west-1.wasabisys.com/preppers_2024-08_66ab408590.img.sha256, but to no avail.

[rgaudin]

Not at the moment ; we dont even compute the checksum. We could do that as part of the image-creator and/or the worker and upload it next to the image for it to work similarly to mirrorbrain (albeit we'd only offer one hash).
I think it's a positive thing that strengthen security and sense of security.
It has one drawback though: it takes a linear time to compute (the longer the larger the image is). We could do that in parallel to upload though so it has no consequence on ready-time.