On 24/07/21 17:16, Michał Górny wrote:
> Hi, everyone.
> 
> I've been asked to repost the idea of removing SHA512 hash from
> Manifests, effectively limiting them to BLAKE2B.
> 
> The 'old' set of Gentoo hashes including SHA512 went live in July 2012.
> In November 2017, we have decided to remove the two other hashes and add
> BLAKE2B in their stead.  Today, all Gentoo packages are using BLAKE2B
> and SHA512 hashes.
> 
> To all extent, this is purely a cosmetic change.  The benefit from
> removing the additional hash is negligible, both from space perspective
> and hashing speed perspective.  The benefit from keeping two hashes is
> also negligible.
> 
> Back during the 2017 discussion, Infra came to the conclusion that we're
> going to keep SHA512 for a transition period, then remove it, and stay
> with a single hash algorithm.  In my opinion, we have kept it long
> enough.
> 
> WDYT?
> 

I'd remove it once we have a second hash to add and/or BLAKE2B is
widespread enough on upstream.

lu

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