libcli/auth: make netlogon_creds_crypt_samlogon_validation more robust

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>

diff --git a/libcli/auth/credentials.c b/libcli/auth/credentials.c
index fb77ede197a3b9c27a6c7d0273832d1184f9caf1..5c8b25b7a4260ac185fc298d6d3c53e9171a70c2 100644 (file)
--- a/libcli/auth/credentials.c
+++ b/libcli/auth/credentials.c
@@ -493,8 +493,12 @@ static void netlogon_creds_crypt_samlogon_validation(struct netlogon_creds_Crede
                                                     bool encrypt)
 {
        static const char zeros[16];
-
        struct netr_SamBaseInfo *base = NULL;
+
+       if (validation == NULL) {
+               return;
+       }
+
        switch (validation_level) {
        case 2:
                if (validation->sam2) {