Rust-Beispiel: Öffentliches/privates Schlüsselpaar mit sodiumoxide generieren und in Datei speichern

use sodiumoxide::crypto::sign;
use std::fs::File;
use std::io::Write;
use std::path::Path;
use base64::{Engine as _, engine::general_purpose};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // sodiumoxide initialisieren
    sodiumoxide::init().expect("Failed to initialize sodiumoxide");

    // Neues Schlüsselpaar generieren
    let (public_key, secret_key) = sign::gen_keypair();

    // Schlüssel in Base64 konvertieren
    let public_key_b64 = general_purpose::STANDARD.encode(public_key.as_ref());
    let secret_key_b64 = general_purpose::STANDARD.encode(secret_key.as_ref());

    // Dateipfade definieren
    let public_key_path = Path::new("public_key.b64");
    let secret_key_path = Path::new("secret_key.b64");

    // Öffentlichen Schlüssel in Datei speichern
    let mut public_key_file = File::create(public_key_path)?;
    public_key_file.write_all(public_key_b64.as_bytes())?;

    // Geheimen Schlüssel in Datei speichern
    let mut secret_key_file = File::create(secret_key_path)?;
    secret_key_file.write_all(secret_key_b64.as_bytes())?;

    println!("Key pair generated and saved successfully!");
    println!("Public key saved to: {:?}", public_key_path);
    println!("Secret key saved to: {:?}", secret_key_path);

    Ok(())
}

[package]
name = "MakeKeyPair"
version = "0.1.0"
edition = "2021"

[dependencies]
sodiumoxide = "0.2"
base64 = "0.21"

cargo run

Public key saved to: "public_key.b64"
Secret key saved to: "secret_key.b64"