[gnutls-devel] GnuTLS | DH and ECDH keys tests (!990)

Development of GNU's TLS library gnutls-devel at lists.gnutls.org
Fri May 17 14:36:25 CEST 2019

Simo Sorce commented on a discussion on lib/nettle/pk.c: https://gitlab.com/gnutls/gnutls/merge_requests/990#note_171505001

>  			goto dh_cleanup;
>  		}
> +		/* if we have Q check that y ^ q mod p == 1 */
> +		if (q != NULL) {

the problem in using Q is that callers like the DH compute, use a structure with space for just two params (P, G), to get through the data to the lower layers.
Is it ok to change those structures to optionally host Q as well ?

If that is fine (unsure if it breaks ABI) then I can easily pass in Q in tests (and CAVS tests will be able to do the same.

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