Re: [asio-users] Native Windows ssl::stream support

[Kasper L. <la...@st...>]

On 21/07/2020 18.08, Vinnie Falco wrote:
> 
> Well, I still think it is worth discussing with other folks, as this
> can only help to inform your efforts.
> 

Of course. I appreciate the help I can get.

> How does Windows TLS work? Is it buffer-oriented? Or does Windows
> control the socket? The answer to this question will have dramatic
> influence on how your code is designed. If Windows wants to control
> the socket, it will require more finesse and understanding of Asio to
> author an I/O object that implements Windows TLS.
> 

As far as I can tell, both options are supported. You can either make 
Windows control the socket:

https://docs.microsoft.com/en-us/windows/win32/winsock/using-secure-socket-extensions

Or use SChannel as a wrapper around an existing socket:

https://docs.microsoft.com/en-us/windows/win32/secauthn/using-sspi-with-a-windows-sockets-client

I was planning to look into the SChannel approach as that seems closest 
to how the OpenSSL implementation works.

Kind regards,

Kasper Laudrup