How to use openssl

[Don Payette]

Thanks, Michael,  I will check out SChannel.
Right now I'm attempting to compile sslecho using Microsoft Visual C++.
It's giving me an error which I can't figure out.
I'm guessing that this is because it's C++ instead of C.

int create_socket ()
{
    int s;
    int optval = 1;

    s = socket (AF_INET, SOCK_STREAM, 0);
    if (s < 0) {
        perror("Unable to create socket");
        exit(EXIT_FAILURE);
    }

    return s;
}

    int client_skt = -1;

    /* Create "bare" socket */
    client_skt = create_socket;

Error (active) E0513 a value of type "int (*)()" cannot be assigned to an
entity of type "int" OpenSSL-Demo  line 152

Error C2440 '=': cannot convert from 'int (__cdecl *)(void)' to 'int'
OpenSSL-Demo C:\Users\PapaDon\source\repos\OpenSSL-Demo\OpenSSL-Demo.cpp
152

Don Payette
(cell) 479-216-6320 <(479)%20216-6320>


On Thu, May 18, 2023 at 11:25 AM Michael Wojcik via openssl-users <
openssl-users at openssl.org> wrote:

> > From: openssl-users <openssl-users-bounces at openssl.org> On Behalf Of
> Don Payette
> > Sent: Thursday, 18 May, 2023 09:35
>
> > I'm a programmer that is responsible for a Windows Service written in
> Visual C++.It communicates
> > with a server using Winsock. I've been tasked with converting it to use
> encryption for the connection.
>
> > Are there any sample programs or any kind of guidance in how to code
> this?
>
> Robert's questions in his reply are pertinent – "communicates ... using
> Winsock" could mean a number of things.
>
> But that aside: do you have a requirement to use OpenSSL? Windows includes
> its own TLS implementation, Microsoft's Schannel, and if you only need to
> support Windows that is, frankly, probably an easier route. OpenSSL has
> various advantages, such as portability and flexibility, but if all you
> need is normal TLS support for Windows only, Schannel will give you a
> somewhat simpler API (even simpler if you were using .NET) and integration
> with Windows PKI, which is often more convenient for Windows customers.
>
> It would help to know more about what actual problem you're trying to
> solve, rather than what technology you think you should use to solve it.
>
> --
> Michael Wojcik
>
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