Does SChannel support TLS 1.3 ? Need help w.r.t example client/server programs in C/C++ for implementing TLS 1.3 using SChannel?

Question

Does SChannel support TLS 1.3 ? I need help with regard to example client/server programs in C/C++ for implementing TLS 1.3 using SChannel.

I found SChannel.h defines SP_PROT_TLS1_3_CLIENT as 0x00002000 , etc. But the grbitEnabledProtocols field of SCHANNEL_CRED does not mention anything about TLS 1.3.

I was unable to find any other information on the Internet to document whether SChannel supports TLS 1.3 or not.

Answer 1

SCH_CREDENTIALS - Win32 apps | Microsoft Docs

SChannel support TLS1.3, In order to use TLS 1.3 with schannel, you should use the SCH_CREDENTIALS structure with AcquireCredentialsHandle().

The SCHANNEL_CRED structure has been deprecated. Starting with Windows 10, 1809 (October 2018 Update), you should use SCH_CREDENTIALS.