process_error
static void process_error(OSSL_CMP_SRV_CTX *srv_ctx, const OSSL_CMP_MSG *error,
static OSSL_CMP_MSG *process_error(OSSL_CMP_SRV_CTX *srv_ctx,
static void process_error(OSSL_CMP_SRV_CTX *srv_ctx, const OSSL_CMP_MSG *error,