Re: [PATCH] crypto/openssl: do not build useless workaround

[Thomas Monjalon <thomas@monjalon.net>]

26/06/2023 11:13, Didier Pallard:
> HI,
> not sure to understand how it is possible.
> If build  OPENSSL_VERSION_NUMBER <  0x10100000L, linker should link binary
> with libcrypto.so.1.0.0.
> libcrypto.so.1.1 if build for 0x10100000L and libcrypto.so.3 for
> 0x30000000L
> loader should not allow to link with a library different from the one used
> at build time, no?

You are probably right.
libcrypto.so.1.1 and libcrypto.so.1.0 are incompatible versions?
If we are linking against libcrypto.so.1.1 and you did exactly
a check for lower than libcrypto.so.1.1, then it should be OK.


> On Sun, Jun 25, 2023 at 9:22 PM Thomas Monjalon <thomas@monjalon.net> wrote:
> 
> > 18/04/2023 16:56, Didier Pallard:
> > > This workaround was needed before version 1.0.1f. Do not build it for
> > > versions >= 1.1.
> > >
> > > Fixes: d61f70b4c918 ("crypto/libcrypto: add driver for OpenSSL library")
> > > Signed-off-by: Didier Pallard <didier.pallard@6wind.com>
> > > Cc: stable@dpdk.org
> > [...]
> > > +#if OPENSSL_VERSION_NUMBER < 0x10100000L
> > >       /* Workaround open ssl bug in version less then 1.0.1f */
> > >       if (EVP_EncryptUpdate(ctx, empty, &unused, empty, 0) <= 0)
> > >               goto process_auth_encryption_gcm_err;
> > > +#endif
> >
> > What happens if we build with OpenSSL 1.1 and run with OpenSSL 1.0?
> > Can we have a runtime check?
> > Or is it better doing the workaround always as before?