key: pakfire_find_key: Check if input is a NULL pointer

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/src/libpakfire/key.c b/src/libpakfire/key.c
index e25c78a2110187e0d1f2f0d3c15e05d99209ec8f..8548db452a85b3608b88dc7c276c4e1ff75f435c 100644 (file)
--- a/src/libpakfire/key.c
+++ b/src/libpakfire/key.c
@@ -209,6 +209,11 @@ PAKFIRE_EXPORT void pakfire_key_unref(struct pakfire_key* key) {
 }
 
 static int pakfire_find_key(struct pakfire_key** key, struct pakfire* pakfire, const char* fingerprint) {
+       if (!fingerprint) {
+               errno = EINVAL;
+               return 1;
+       }
+
        // Reset key
        *key = NULL;