initial import of osmo-gsup-hlr code so far
diff --git a/src/auc.h b/src/auc.h
new file mode 100644
index 0000000..f5b6765
--- /dev/null
+++ b/src/auc.h
@@ -0,0 +1,8 @@
+#pragma once
+
+#include <osmocom/crypt/auth.h>
+
+int auc_compute_vectors(struct osmo_auth_vector *vec, unsigned int num_vec,
+			struct osmo_sub_auth_data *aud2g,
+			struct osmo_sub_auth_data *aud3g,
+			const uint8_t *rand_auts, const uint8_t *auts);