Function btokCVCIss 

pub unsafe extern "C" fn btokCVCIss(
    cert: *mut octet,
    cert_len: *mut usize,
    cvc: *mut btok_cvc_t,
    certa: *const octet,
    certa_len: usize,
    privkeya: *const octet,
    privkeya_len: usize,
) -> err_t