using System;
using System.Text;
using Org.BouncyCastle.Crypto.Engines;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Utilities.Encoders;
using UnityEngine;


class SM4Example: MonoBehaviour
{
    // SM4 加密
    public static byte[] Encrypt(byte[] plainText, byte[] key)
    {
        var engine = new SM4Engine();
        engine.Init(true, new KeyParameter(key)); // true 表示加密模式
        byte[] encrypted = new byte[plainText.Length];
        engine.ProcessBlock(plainText, 0, encrypted, 0);
        return encrypted;
    }


    // SM4 解密
    public static byte[] Decrypt(byte[] cipherText, byte[] key)
    {
        var engine = new SM4Engine();
        engine.Init(false, new KeyParameter(key)); // false 表示解密模式
        byte[] decrypted = new byte[cipherText.Length];
        engine.ProcessBlock(cipherText, 0, decrypted, 0);
        return decrypted;
    }


    

    void Start()
    {
        // 密钥和明文
        byte[] key = Encoding.UTF8.GetBytes("1234567890abcdef"); // 128 位密钥 (16 字节)
        byte[] plainText = Encoding.UTF8.GetBytes("111");


        // 加密
        byte[] encrypted = Encrypt(plainText, key);
        Console.WriteLine("加密后的数据 (Hex): " + Hex.ToHexString(encrypted));


        // 解密
        byte[] decrypted = Decrypt(encrypted, key);
        Console.WriteLine("解密后的数据: " + Encoding.UTF8.GetString(decrypted));
    }
}