Re: X25519 not listed in ecparam -list_curves

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As "-list-curves" is not supposed to work here, what would be a good way to tell if a given installation supports X25519?

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  Original Message  
From: Dr. Stephen Henson
Sent: Monday, November 14, 2016 15:02
To: openssl-users@xxxxxxxxxxx
Reply To: openssl-users@xxxxxxxxxxx
Subject: Re:  X25519 not listed in ecparam -list_curves
‎
On Fri, Nov 04, 2016, Viktor J?gersk?pper wrote:

> Hi,
> 
> OpenSSL 1.1.0 implemented X25519. "openssl s_client -cipher kEECDH
> -curves X25519 -connect google.com:443" works as expected, and I get
> "Server Temp Key: X25519, 253 bits". But X25519 is not listed in the
> output of "openssl ecparam -list_curves" in version 1.1.0b (I use
> 1.1.0b-2 from Debian). Should it be listed there anyway?
> 
‎
The ecparam operation lists curves supported by the EC* API. The X25519 curve
(for various reasons defined in the standards) is treated as a distinct
algorithm so it is not listed by ecparam.

Steve.
--
Dr Stephen N. Henson. OpenSSL project core developer.
Commercial tech support now available see: http://www.openssl.org
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