If I connect to an TLS 1.0 - 1.2 endpoint with a HttpClient and Mono 5.14.0 I get the exception "No such TLS Provider: btls."
No such TLS Provider: `btls'.
at Mono.Net.Security.MonoTlsProviderFactory.LookupProvider (System.String name, System.Boolean throwOnError)
as Mono.Net.Security.MonoTlsProviderFactory.CreateDefaultProviderImpl ()
at Mono.Net.Security.MonoTlsProviderFactory.InitializeInternal ()
If I change the TLS Provider to legacy I can only connect to an Endpoint with TLS 1.0, an Endpoint with TLS 1.0 - 1.2 doesn't work.
MONO_TLS_PROVIDER=legacy
I don't understand how the provider blts is unknown, since Mono 4.8.0 is the provider btls from the BoringSSL project included. see here.
If I take a look at MonoTlsProviderFactory.cs to understand this behavior, I stumble upon the line, which I don't understand.
internal extern static bool IsBtlsSupported ();
see here and there is the MONO_FEATURE_BTLS symbol which is a condition for btls. But How can I know if my Mono version is compiled with this symbol?
There are similar cases but with an older Mono version