auth/gensec: handle gensec_security_by_sasl_name(NULL, ...)

We do that for all other gensec_security_by_*() functions already.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

diff --git a/auth/gensec/gensec_start.c b/auth/gensec/gensec_start.c
index be316978a0b77ce7687d724c58d0d0d23cdab505..8d4bfa76a9e8ef8c514891c97f1d724c16bb0664 100644 (file)
--- a/auth/gensec/gensec_start.c
+++ b/auth/gensec/gensec_start.c
@@ -211,8 +211,10 @@ _PUBLIC_ const struct gensec_security_ops *gensec_security_by_sasl_name(
        }
        backends = gensec_security_mechs(gensec_security, mem_ctx);
        for (i=0; backends && backends[i]; i++) {
-               if (!gensec_security_ops_enabled(backends[i], gensec_security))
-                   continue;
+               if (gensec_security != NULL &&
+                   !gensec_security_ops_enabled(backends[i], gensec_security)) {
+                       continue;
+               }
                if (backends[i]->sasl_name
                    && (strcmp(backends[i]->sasl_name, sasl_name) == 0)) {
                        backend = backends[i];