BLAKE3

[yorda]

> On 18/04/2020, at 5:16 PM, Jesper Louis Andersen <jesper.louis.andersen@REDACTED> wrote:
> 
> If you can accept BLAKE2b, the github.com/jlouis/enacl <http://github.com/jlouis/enacl> library supports that through the generichash set of functions (from libsodium). It provides many of the BLAKE-3 benefits, while also providing a large set of other useful primitives on top.
> 
> If you really require BLAKE-3 support, rolling a NIF with it should be fairly straightforward. You can eventually take a look at the C code in enacl, which roughly can be adapted into the style of the BLAKE-3 C calls. Hide the BLAKE-3 state in a NIF resource and protect its access by a mutex.
> 
> However, I think their impressive benchmarks are obtained by using a parallelized BLAKE-3 against a serial BLAKE2b. In an Erlang setting, it would probably be detrimental to the overall health of the system to grab all CPU cores for hash computations in the name of speed, provided you have enough work to do for the other cores. Your hash computation will be fast, but everything else would just incur higher latency. This might not be desirable.
> 
Good point! Occupy all the CPU for hashing might make the beam running slow, but I just found out someone made an PR to offload the hashing to GPU:

https://github.com/BLAKE3-team/BLAKE3/pull/80 <https://github.com/BLAKE3-team/BLAKE3/pull/80>

This may make beam happy

> As for the security margin, what do you have in mind? Both generichash and BLAKE-3 supports a keyed hashing variant, and I would definitely recommend using those if possible. But in practice, SHA-2 isn't really "insecure" as far as what we are trying to use it for (except for length-extension, but there are ways around that). In short, what do you have in mind w.r.t "more security?"
> 
> On Fri, Apr 17, 2020 at 10:08 PM - Neustradamus - <neustradamus@REDACTED <mailto:neustradamus@REDACTED>> wrote:
> Hello Erlang community,
> 
> For more security, can you add BLAKE3 support?
> - https://github.com/BLAKE3-team <https://github.com/BLAKE3-team>
> - https://github.com/BLAKE3-team/BLAKE3 <https://github.com/BLAKE3-team/BLAKE3>
> - https://github.com/BLAKE3-team/BLAKE3-specs <https://github.com/BLAKE3-team/BLAKE3-specs>
> 
> Thanks in advance.
> 
> Regards,
> 
> Neustradamus
> 
> 
> -- 
> J.

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