OpenSSL 3 compatibility patch

[Jouni Malinen]

On Fri, Apr 08, 2022 at 02:27:33PM -0400, Alan DeKok wrote:
>   This patch allows hostap / wpa_supplicant to build with OpenSSL3.  It uses the OpenSLL 1.1.0 compatibility API.  It's a one-line change to a Makefile, and doesn't change any API uses in the rest of the source.
> 
>   The resulting eapol_test works for me in limited tests.  However, OpenSSL3 sometimes behaves differently from OpenSSL 1.1.0, even for similar API calls / callbacks.  There's no guarantee that a binary built against OpenSLL3 will still work in exactly the same way as one built against OpenSSL 1.1.0.

I can build wpa_supplicant and eapol_test without such a change on
Ubuntu 22.04 beta with only OpenSSL 3.0 installed on the system. Sure,
there are still quite a few compiler warnings from the use of deprecated
functions, but as long as -Werror is not used, this should work just
fine. And if someone does want to define some special parameters for
OpenSSL, that should be done in wpa_supplicant/.config instead of
hardcoding them to be used from a Makefile.

-- 
Jouni Malinen                                            PGP id EFC895FA