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Rust 示例：使用 sodiumoxide 生成公私钥对并保存到文件

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这个简单的 Rust 程序演示了如何使用 sodiumoxide crate 生成公私钥对，并将密钥以 base64 格式保存到文件中。

src/main.rs
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>> {
    // 初始化 sodiumoxide
    sodiumoxide::init().expect("初始化 sodiumoxide 失败");

    // 生成新的密钥对
    let (public_key, secret_key) = sign::gen_keypair();

    // 将密钥转换为 base64
    let public_key_b64 = general_purpose::STANDARD.encode(public_key.as_ref());
    let secret_key_b64 = general_purpose::STANDARD.encode(secret_key.as_ref());

    // 定义文件路径
    let public_key_path = Path::new("public_key.b64");
    let secret_key_path = Path::new("secret_key.b64");

    // 将公钥保存到文件
    let mut public_key_file = File::create(public_key_path)?;
    public_key_file.write_all(public_key_b64.as_bytes())?;

    // 将私钥保存到文件
    let mut secret_key_file = File::create(secret_key_path)?;
    secret_key_file.write_all(secret_key_b64.as_bytes())?;

    println!("密钥对已成功生成并保存！");
    println!("公钥已保存到：{:?}", public_key_path);
    println!("私钥已保存到：{:?}", secret_key_path);

    Ok(())
}
Cargo.toml
[package]
name = "MakeKeyPair"
version = "0.1.0"
edition = "2021"

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

如何运行

run.sh
cargo run

输出

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