pub unsafe extern "C" fn rsa_import_raw(
    ctx: *mut rsa_context,
    N: *const c_uchar,
    N_len: usize,
    P: *const c_uchar,
    P_len: usize,
    Q: *const c_uchar,
    Q_len: usize,
    D: *const c_uchar,
    D_len: usize,
    E: *const c_uchar,
    E_len: usize
) -> c_int