SHA3

[caligatio]

SHA3

[Caligatio]

I'm definitely going to add it once it gets added to the standard. When the winner was first announced, I looked into adding it then but, if I recall correctly, the candidate had a lot of options. I suspect when NIST officially updates the standard that the number of available options will be whittled down.

[clayzermk1]

👍

There's been quite a bit of progress, at least they have a draft now based on Keccak.

http://csrc.nist.gov/groups/ST/hash/index.html
http://keccak.noekeon.org/

[Caligatio]

I'm hoping by the end of the year that there will be a final standard that I can implement (not terribly excited for four more algorithms but such is life). I really want to avoid shipping draft standards because then, if they change, all your stored hashes are garbage.

[clayzermk1]

A very valid point 😀

[nazar-pc]

It is already here)

[Caligatio]

Thanks @nazar-pc for the heads-up. It appears that there will be some confusion with SHA-3 variants vs SHA-2 (i.e. there are 224, 256, 384, and 512 for both) so this may justify a v3 release and changing all the names to be like SHA2-256 and SHA3-256.

The next month is going to be hectic for me so this may unfortunately take me some time.

[vogievetsky]

Definitely +1 for the SHA3 stuff. Also +1 for a v3 release with name changes to SHA2-256 e.t.c.

[Caligatio]

I took a look at the NIST spec and it definitely seems like it's written by math people and not programmers :( That combined with the fact all the implementations that exist are for the pre-NIST spec make this a lot rougher than I was hoping.

It’s been a while… but maybe the following helps for “inspiration”:

https://github.com/search?l=JavaScript&q=sha3&type=Repositories&utf8=%E2%9C%93

[Caligatio]

It was literally as bad as I thought but I have untested support for non-SHAKE SHA3 in my sha3 branch sha_dev.js Note that the compiled versions aren't there yet and I've only tested the 4 variants with "abc".

I need to tackle SHAKE128 and SHAKE256 which, I hope, won't be too bad. If anyone wants to do a PR for unit tests, I'd be very appreciative.

[Caligatio]

I got all the unit tests passing for the fixed-length SHA3 variants (including HMAC). Next up are the SHAKEs.

The sha3 branch has the compiled versions as well if you want to play with them.

[Caligatio]

Closing this as done with commit e191a57