How to use openssl

[Don Payette]

I have a sample program that has:
#include <openssl/ssl.h>
#include <openssl/err.h>

I go look in C:\Users\MyUser\Documents\OpenSSL\include\openssl and I find:

ssl.h.in
err.h.in

but  doesn't have

ssl.h
err.h

So the compile gets an error.

What is going on here?

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


On Wed, May 24, 2023 at 1:23 PM Michael Wojcik via openssl-users <
openssl-users at openssl.org> wrote:

> > From: Don Payette <payettedon at gmail.com>
> > Sent: Wednesday, 24 May, 2023 12:12
>
> > The compiler is Visual C++.
>
> Microsoft Visual C++ (a misnomer) is both a C and C++ compiler. In recent
> versions it's even come close to providing a conforming implementation of a
> decently reasonable edition of the C standard.
>
> > I'm trying to fix this C code to work in Windows since my app is a
> Windows service written in Visual C++. It
> > would be be real nice if openSSL had a version of the sample program
> that works in Microsoft Visual C++.
>
> It does. OpenSSL includes the various utilities that are bundled into the
> "openssl" executable ("openssl.exe" on Windows). They're part of the
> OpenSSL source tree, in the apps directory. If you configure OpenSSL to be
> built by Visual C++, then those programs will also build under Visual C++.
>
> They are all C, not C++, but it's much simpler to go from C to C++ since
> most of the C standard is incorporated into C++.
>
> (Officially the entire C standard is incorporated into the C++ standard,
> if memory serves and that hasn't changed since the last time I muddled
> through the C++ standard. In practice, of course, C++ invades the
> application namespace all over the place, and a significant number of C
> best practices don't work in C++ due to differences in things like type
> handling. But it's still less work to convert C to C++, or simply use C
> within C++. I don't recommend using C in a C++ application; if you're going
> to put up with the infelicities of C++, you might as well get the benefits.
> But many people do it nonetheless.)
>
> --
> Michael Wojcik
>
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