Function PEM_write_bio_ECPrivateKey

pub unsafe extern "C" fn PEM_write_bio_ECPrivateKey(
    bio: *mut BIO,
    key: *const EC_KEY,
    cipher: *const EVP_CIPHER,
    kstr: *const c_uchar,
    klen: c_int,
    callback: pem_password_cb,
    user_data: *mut c_void,
) -> c_int