Function botan_sys::botan_privkey_export_encrypted

pub unsafe extern "C" fn botan_privkey_export_encrypted(
    key: botan_privkey_t, 
    out: *mut u8, 
    out_len: *mut usize, 
    rng: botan_rng_t, 
    passphrase: *const c_char, 
    encryption_algo: *const c_char, 
    flags: u32
) -> c_int