Comment 3 for bug 1733634

Yeah, sha256 definitely isn't supported -- the only place we even mention it in code is in the encryption-of-object-data-at-rest feature. Got any docs for the cloud files work? https://developer.rackspace.com/docs/cloud-files/v1/use-cases/public-access-to-your-cloud-files-account/#tempurl only seems to mention sha1. I'd be interested in adding support for other, stronger digests (with an eye toward deprecating and eventually getting rid of sha1-based signatures), but I'd hate to come up with an incompatible API "just because".

Really, we probably should have started this work a while ago -- the writing's been on the wall for years: https://www.schneier.com/blog/archives/2012/10/when_will_we_se.html