如何在纯Java中创建或打开兼容libsodium的密封盒

import org.libsodium.jni.NaCl;
import org.libsodium.jni.Sodium;
import org.libsodium.jni.crypto.SecretBox;
import org.libsodium.jni.keys.KeyPair;

public class SealedBoxExample {
    public static void main(String[] args) {
        // 初始化libsodium库
        Sodium sodium = NaCl.sodium();

        // 生成密钥对
        KeyPair keyPair = new KeyPair();
        byte[] publicKey = keyPair.getPublicKey();
        byte[] privateKey = keyPair.getPrivateKey();

        // 创建密封盒
        SecretBox sealedBox = new SecretBox(publicKey, privateKey);

        // 加密数据
        byte[] plaintext = "Hello, World!".getBytes();
        byte[] ciphertext = sealedBox.encrypt(plaintext);

        // 解密数据
        byte[] decrypted = sealedBox.decrypt(ciphertext);

        System.out.println(new String(decrypted));
    }
}