gnutls_session_get_flags: introduced GNUTLS_SFLAGS_RFC7919

This allows checking whether the DHE parameters used were negotiated
using RFC7919.

Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/dh.c b/lib/dh.c
index 4686736946..c8e84680f9 100644
--- a/lib/dh.c
+++ b/lib/dh.c
@@ -79,6 +79,7 @@ _gnutls_figure_dh_params(gnutls_session_t session, gnutls_dh_params_t dh_params,
 	group = get_group(session);
 
 	params.deinit = 0;
+	session->internals.used_ffdhe = 0;
 
 	/* if we negotiated RFC7919 FFDHE */
 	if (group && group->pk == GNUTLS_PK_DH) {
@@ -100,6 +101,7 @@ _gnutls_figure_dh_params(gnutls_session_t session, gnutls_dh_params_t dh_params,
 					goto cleanup;
 				}
 
+				session->internals.used_ffdhe = 1;
 				q_bits = *session->internals.priorities->groups.entry[i]->q_bits;
 				goto finished;
 			}