-extern ecdsa_t *read_ecdsa_private_key(splay_tree_t *config_tree, char **keyfile);
-extern bool read_ecdsa_public_key(ecdsa_t **ecdsa, splay_tree_t **config_tree, const char *name);
+extern ecdsa_t *read_ecdsa_private_key(splay_tree_t *config_tree, char **keyfile) ATTR_MALLOC ATTR_DEALLOCATOR(ecdsa_free);
+extern ecdsa_t *read_ecdsa_public_key(splay_tree_t **config_tree, const char *name) ATTR_MALLOC ATTR_DEALLOCATOR(ecdsa_free);