[openssl-users] Call for testing TLS 1.3

[Matt Caswell]

On 24/05/18 10:58, John Jiang wrote:
> Should I see PSK identity here? Or, it is the TLS session ticket.

It's the session ticket.


>     A HelloRetryRequest will occur if the key share provided by the client
>     is not acceptable to the server. By default the client will send an
>     X25519 key share, so if the server does not accept that group then an
>     HRR will result, e.g.
> 
>     $ openssl s_server -cert cert.pem -key key.pem -groups P-256
>     $ openssl s_client
> 
> It looks option "-groups" just specifies the most preferable named groups,
> but other groups still could be negotiated. Right?

No, it restricts the groups acceptable to the server.

> 
> I found interesting things from trace logs.
> 
> BTW, the TLS 1.3 wiki [1] stats that the TLS 1.3 cipher suites are named:
> TLS13-AES-256-GCM-SHA384
> TLS13-CHACHA20-POLY1305-SHA256
> TLS13-AES-128-GCM-SHA256
> TLS13-AES-128-CCM-8-SHA256
> TLS13-AES-128-CCM-SHA256
> But with version 1.1.1-pre6, they are using the formal names,
> like TLS_AES_256_GCM_SHA384.

Ah, right thanks - we renamed them to the standard names a while ago. I
fixed the wiki.

Matt



> 
> [1] https://wiki.openssl.org/index.php/TLS1.3
> 
> Thanks!
>  
> 
> 
>     Matt
> 
> 
> 
>     > 
>     > 2018-04-29 18:43 GMT+08:00 Kurt Roeckx <kurt at roeckx.be <mailto:kurt at roeckx.be>
>     > <mailto:kurt at roeckx.be <mailto:kurt at roeckx.be>>>:
>     > 
>     >     The upcomming OpenSSL 1.1.1 release will have TLS 1.3 support. TLS
>     >     1.3 brings a lot of changes that might cause incompatibility. For
>     >     an overview see https://wiki.openssl.org/index.php/TLS1.3
>     <https://wiki.openssl.org/index.php/TLS1.3>
>     >     <https://wiki.openssl.org/index.php/TLS1.3
>     <https://wiki.openssl.org/index.php/TLS1.3>>
>     > 
>     >     We are considering if we should enable TLS 1.3 by default or not,
>     >     or when it should be enabled. For that, we would like to know how
>     >     applications behave with the latest beta release.
>     > 
>     >     When testing this, it's important that both sides of the
>     >     connection support the same TLS 1.3 draft version. OpenSSL
>     >     currently implements draft 26. We would like to see tests
>     >     for OpenSSL acting as client and server.
>     > 
>     >     https://github.com/tlswg/tls13-spec/wiki/Implementations
>     <https://github.com/tlswg/tls13-spec/wiki/Implementations>
>     >     <https://github.com/tlswg/tls13-spec/wiki/Implementations
>     <https://github.com/tlswg/tls13-spec/wiki/Implementations>> lists
>     >     other TLS 1.3 implementations and the draft they currently
>     >     support. Note that the versions listed there might not be for the
>     >     latest release. It also lists some https test servers.
>     > 
>     >     We would really like to see a diverse set of applictions being
>     >     tested. Please report any results you have to us.
>     > 
>     > 
>     >     Kurt
>     > 
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