Re: [openssl-users] Curves and ECDHParameters

2018-09-11 Thread Viktor Dukhovni
> On Sep 11, 2018, at 6:20 PM, Viktor Dukhovni > wrote: > > > The 1.0.2 documentation for "ECDHParameters" explains that this is > server-side setting to select a particular *fixed* ECDHE curve. > This is a legacy feature that predates negotiation of the curve > used based on the client's ex

Re: [openssl-users] Curves and ECDHParameters

2018-09-11 Thread Viktor Dukhovni
> On Sep 11, 2018, at 4:55 PM, Joseph Christopher Sible > wrote: > > What exactly are each of "Curves" and "ECDHParameters" used for, as > documented by https://www.openssl.org/docs/man1.0.2/ssl/SSL_CONF_cmd.html? The documentation of OpenSSL 1.1.x does not mention "ECDHParameters", only "Curve

[openssl-users] Curves and ECDHParameters

2018-09-11 Thread Joseph Christopher Sible
What exactly are each of "Curves" and "ECDHParameters" used for, as documented by https://www.openssl.org/docs/man1.0.2/ssl/SSL_CONF_cmd.html? My understanding of elliptic curves in TLS is that they're used in two places: as ECDSA key pairs used in certificates, and in ECDHE for key exchange. (Are