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@xxxxxxxxx <mailto:kurt@xxxxxxxxx> > > <mailto:kurt@xxxxxxxxx <mailto:kurt@xxxxxxxxx>>>: > > > > 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 > > > > -- > > openssl-users mailing list > > To unsubscribe: > > https://mta.openssl.org/mailman/listinfo/openssl-users > <https://mta.openssl.org/mailman/listinfo/openssl-users> > > <https://mta.openssl.org/mailman/listinfo/openssl-users > <https://mta.openssl.org/mailman/listinfo/openssl-users>> > > > > > > > > > -- > openssl-users mailing list > To unsubscribe: > https://mta.openssl.org/mailman/listinfo/openssl-users > <https://mta.openssl.org/mailman/listinfo/openssl-users> > > > > -- openssl-users mailing list To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users
