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 一、 加密算法

1.异或加密算法

是对两个运算元的一种逻辑分析类型，符号为XOR或EOR。与一般的逻辑或OR不同，当两两数值相同为否，而数值不同时为真。异或密码（simple XOR cipher）是中一种简单的加密算法，是指对信息进行异或操作来达到加密和解密目的。按这种逻辑，文本串行的每个字符可以通过与给定的密钥进行按位异或运算来加密。如果要解密，只需要将加密后的结果与密钥再次进行按位异或运算即可。()

2.加密

public static string EncryptDES(string encryptString, string key = "45131929"){}

  Key 个数是 8 位默认是“45131929”

3.解密

public static string DecryptDES(string decryptString, string key = "45131929"){}

  Key 个数是 8 位默认是“45131929”

#region  字符串加密解密        private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };        /// 
        /// DES加密字符串        /// 
        /// 待加密的字符串        /// 加密密钥,要求为8位        /// 
   
    加密成功返回加密后的字符串，失败返回源串
           public static string EncryptDES(string encryptString, string key = "45131929")        {            try            {                byte[] rgbKey = Encoding.UTF8.GetBytes(key.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            {                Debug.LogError("StringEncrypt/EncryptDES()/ Encrypt error!");                return encryptString;            }        }        /// 
        /// DES解密字符串        /// 
        /// 待解密的字符串        /// 解密密钥,要求为8位,和加密密钥相同        /// 
   
    解密成功返回解密后的字符串，失败返源串
           public static string DecryptDES(string decryptString, string key = "45131929")        {            try            {                byte[] rgbKey = Encoding.UTF8.GetBytes(key);                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.LogError("StringEncrypt/DecryptDES()/ Decrypt error!");                return decryptString;            }        }        #endregion

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