using System;
using System.IO;
using System.Linq;
using System.Net.NetworkInformation;
using System.Security.Cryptography;
using System.Text;
using UnityEngine;

public class AesEncryption : MonoBehaviour
{

    private void Start()
    {
        string encrypted = Encrypt("cyx");
        Debug.Log("Encrypted: " + encrypted);
        string decrypted = Decrypt(encrypted);
        Debug.Log("Decrypted: " + decrypted);

    }
    private static readonly string key = "1234asdf1234asdf"; // 必须是16, 24或32字符长
    private static readonly string iv = "1234asdf1234asdf"; // 必须是16字符长

    public static string Encrypt(string plainText)
    {
        using (Aes aesAlg = Aes.Create())
        {
            aesAlg.Key = Encoding.UTF8.GetBytes(key);
            aesAlg.IV = Encoding.UTF8.GetBytes(iv);
            ICryptoTransform encryptor = aesAlg.CreateEncryptor();

            using (MemoryStream msEncrypt = new MemoryStream())
            {
                using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
                {
                    using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
                    {
                        swEncrypt.Write(plainText);
                    }
                    byte[] encrypted = msEncrypt.ToArray();
                    return Convert.ToBase64String(encrypted);
                }
            }
        }
    }

    public static string Decrypt(string cipherText)
    {
        using (Aes aesAlg = Aes.Create())
        {
            aesAlg.Key = Encoding.UTF8.GetBytes(key);
            aesAlg.IV = Encoding.UTF8.GetBytes(iv);

            ICryptoTransform decryptor = aesAlg.CreateDecryptor();

            using (MemoryStream msDecrypt = new MemoryStream(Convert.FromBase64String(cipherText)))
            {
                using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
                {
                    using (StreamReader srDecrypt = new StreamReader(csDecrypt))
                    {
                        return srDecrypt.ReadToEnd();
                    }
                }
            }
        }
    }
}