On Tue, Jun 21, 2022 at 06:37:57PM +0200, Roberto Sassu wrote: > + if (child_pid == 0) { > + snprintf(path, sizeof(path), "%s/signing_key.pem", tmp_dir); > + > + return execlp("./sign-file", "./sign-file", "-d", "sha256", > + path, path, data_template, NULL); Did you miss my earlier reply requesting not to do this module_signature append and use signature directly?