Is TLS1.3 supoorted? (via Winhttp)

Jojo Tang 86 Reputation points
2021-06-25T10:20:50.947+00:00

Hi,
I upgrade my MFC app from VC2017 to VC2019, use WINSDK (10.0.19041.0)
Platform : Win10 1903

I had try to connect to server with TLS1.3, but failed.

Use IE 11 (TLS1.3 enabled in advanced setting) failed to , but MS Edge connect OK.

This Win10 1903 version is supported TLS 1.3 using Winhttp??

Any register key need to be added?

Windows API - Win32
Windows API - Win32
A core set of Windows application programming interfaces (APIs) for desktop and server applications. Previously known as Win32 API.
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Windows 10 Network
Windows 10 Network
Windows 10: A Microsoft operating system that runs on personal computers and tablets.Network: A group of devices that communicate either wirelessly or via a physical connection.
2,271 questions
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Accepted answer
  1. Leon Laude 85,651 Reputation points
    2021-06-25T10:31:28.447+00:00

    Hi @Jojo Tang ,

    TLS 1.3 is not yet supported in Windows 10 version 1903, it will be supported in later versions of Windows 10 or Windows 11.

    TLS protocol version support
    https://learn.microsoft.com/en-us/windows/win32/secauthn/protocols-in-tls-ssl--schannel-ssp-#tls-protocol-version-support

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    If the reply was helpful please don't forget to upvote and/or accept as answer, thank you!

    Best regards,
    Leon

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  1. Castorix31 81,636 Reputation points
    2021-06-25T10:28:07.353+00:00

    You can see this thread : Any plan to support TLS 1.3? #1548

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