On 09-04-2020 15:45, Johannes Bauer wrote:
> On 09.04.20 12:50, Jan Just Keijser wrote:
>> I'd rephrase that:   not every advance in a TLS library does
>> automatically add that capability to OpenVPN.
>>
>> What I mean by that is that some of the newer algorithms in OpenSSL (or
>> mbedTLS) *DO* become available in OpenVPN automatically (e.g.
>> ARIA-256-GCM from OpenSSL 1.1.1) . But you are absolutely right in the
>> sense that it is a shame that some many new developments in a crypto lib
>> (like GCM modes and AEAD ciphers) take such a long time to get added to
>> OpenVPN.
>> I don't quite grap why chacha20 is not available in OpenVPN - it seems
>> to be "just another" AEAD cipher, but I am sure that Steffan can shed
>> light on this.
> 
> Hm, interesting. Yeah from the API perspective I do not know why
> ChaCh20/Poly1305 should be different than any other AEAD stream cipher.
> Especially when you already have support for GCM, which essentially
> makes the underlying block cipher behave as a stream cipher, the API
> should be identical. Maybe I'm missing something here.

Already done. Will be part of the 2.5 release:

https://github.com/OpenVPN/openvpn/commit/6d0d0af

-Steffan


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