diff --git a/drivers/auth/auth_util.c b/drivers/auth/auth_util.c
new file mode 100644
index 0000000..c12d2c3
--- /dev/null
+++ b/drivers/auth/auth_util.c
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2025, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stddef.h>
+
+#include <drivers/auth/auth_util.h>
+
+static const char *current_pk_oid;
+
+const char *get_current_pk_oid(void)
+{
+	return current_pk_oid;
+}
+
+void set_current_pk_oid(const char *pk_oid)
+{
+	current_pk_oid = pk_oid;
+}