.net TLS 1.2 enable Ed25519 in signature algorithms extension

Question

Hi,

We are trying to use .net System.Net.Security Sslstream to communicate with a TLS server which only support ED25519 signature algorithm. The problem is ED25519 is missed in signature algorithms extension in client hello, which is not accepted by TLS server.

Reference code:

https://learn.microsoft.com/en-us/dotnet/api/system.net.security.sslstream?view=net-7.0

Reference specification:

https://www.rfc-editor.org/rfc/rfc8422#section-5.1.3

Thanks

Leo

Answer 1

This seems to be an open issue: https://github.com/dotnet/runtime/issues/63174