Missing algorithms

[newpavlov]

• GOST modes (migrate from here)
• Web CTR (counter width variable at runtime, see Need to dynamically configure counter limits in CTR stream cipher #4)
• Ciphertext stealing (cts: initial crate #70)
• XTS
• Tweakable block cipher modes

[lumag]

For the GOST modes please also add support for the internal rekeying (RFC4357, old Gost89 is useless without it) and also support for the ACPKM (RFC8645) rekeying.

[zer0x64]

Hey!

I recently implemented XTS(XEX with Tweak and Ciphertext Stealing) for another project and I was wondering about implementing it here while my memory was fresh. Is that something that's already covered by the cts crate?

[pheki]

Not answering your question (altough it doesn't seem to be implemented) and not affiliated with the RustCrypto org, but I'd love to see XTS implemented here.

I have the xts-mode crate, that I did not upstream at the time due to issues with previous cipher traits, but I would be able to deprecate it if it were implemented upstream.

[newpavlov]

Ah, I forgot about XTS while implementing the cts crate. The OP list is updated.

@pheki
Could you create a PR in this repository with your code using xts for crate name? If you don't have time right now, I could do it myself a bit later.

[zer0x64]

You can expect a PR from me in the following days then!

[zer0x64]

Moving conversation for XTS over here: #73