Unity3d資料加密

在unity中可以使用c#內建的對稱演算法對資料進行加密，下面兩種密碼編譯演算法：

using System;using System.Text;using System.Security.Cryptography;using System.IO;  using UnityEngine;  public class StringEncryption{          #region  方法一 C#中對字串加密解密（對稱演算法）    private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };    /// <summary>    /// DES加密字串    /// </summary>    /// <param name="encryptString">待加密的字串</param>    /// <param name="encryptKey">加密金鑰,要求為8位</param>    /// <returns>加密成功返回加密後的字串，失敗返回源串</returns>    public static string EncryptDES(string encryptString, string encryptKey)    {        try        {            byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));            byte[] rgbIV = Keys;            byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);            DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();            MemoryStream mStream = new MemoryStream();            CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);            cStream.Write(inputByteArray, 0, inputByteArray.Length);            cStream.FlushFinalBlock();            cStream.Close();            return Convert.ToBase64String(mStream.ToArray());        }        catch        {            return encryptString;        }    }          /// <summary>    /// DES解密字串    /// </summary>    /// <param name="decryptString">待解密的字串</param>    /// <param name="decryptKey">解密密鑰,要求為8位,和加密金鑰相同</param>    /// <returns>解密成功返回解密後的字串，失敗返源串</returns>    public static string DecryptDES(string decryptString, string decryptKey)    {        try        {            byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);            byte[] rgbIV = Keys;            byte[] inputByteArray = Convert.FromBase64String(decryptString);            DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();            MemoryStream mStream = new MemoryStream();            CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);            cStream.Write(inputByteArray, 0, inputByteArray.Length);            cStream.FlushFinalBlock();            cStream.Close();            return Encoding.UTF8.GetString(mStream.ToArray());        }        catch        {            Debug.Log("catch");            return decryptString;        }    }    #endregion                                        #region MD5無法復原加密    //32位加密    public string GetMD5_32(string s, string _input_charset)     {         MD5 md5 = new MD5CryptoServiceProvider();         byte[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s));         StringBuilder sb = new StringBuilder(32);         for (int i = 0; i < t.Length; i++)         {             sb.Append(t[i].ToString("x").PadLeft(2, '0'));         }         return sb.ToString();     }       //16位加密     public static string GetMd5_16(string ConvertString)     {         MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();         string t2 = BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8);         t2 = t2.Replace("-", "");         return t2;     }    #endregion}