We currently have a way to obtain all relevant checksums (sha1, sha256 and sha1_git) when a user drops a file onto the search page.

We would like to be able to batch-search files according to all 3 of these checksums at once, instead of having to select a single checksum to use. This entails propagating the change in search approach to all layers, potentially (!) breaking the API currently in use on the public-facing website.