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  • (转载)C#字符串简单加密解密函数

    转载自https://www.jb51.net/article/61986.htm

    using System.Security.Cryptography;
    using System.Text;
    static string encryptKey = "abcd";//字符串加密密钥(注意:密钥只能是4位)
    
            private string Encrypt(string str)
            {//加密字符串
    
                try
                {
                    byte[] key = Encoding.Unicode.GetBytes(encryptKey);//密钥
                    byte[] data = Encoding.Unicode.GetBytes(str);//待加密字符串
    
                    DESCryptoServiceProvider descsp = new DESCryptoServiceProvider();//加密、解密对象
                    MemoryStream MStream = new MemoryStream();//内存流对象
    
                    //用内存流实例化加密流对象
                    CryptoStream CStream = new CryptoStream(MStream, descsp.CreateEncryptor(key, key), CryptoStreamMode.Write);
                    CStream.Write(data, 0, data.Length);//向加密流中写入数据
                    CStream.FlushFinalBlock();//将数据压入基础流
                    byte[] temp = MStream.ToArray();//从内存流中获取字节序列
                    CStream.Close();//关闭加密流
                    MStream.Close();//关闭内存流
    
                    return Convert.ToBase64String(temp);//返回加密后的字符串
                }
                catch
                {
                    return str;
                }
            }
    
    
            private string Decrypt(string str)
            {//解密字符串
    
                try
                {
                    byte[] key = Encoding.Unicode.GetBytes(encryptKey);//密钥
                    byte[] data = Convert.FromBase64String(str);//待解密字符串
    
                    DESCryptoServiceProvider descsp = new DESCryptoServiceProvider();//加密、解密对象
                    MemoryStream MStream = new MemoryStream();//内存流对象
    
                    //用内存流实例化解密流对象
                    CryptoStream CStream = new CryptoStream(MStream, descsp.CreateDecryptor(key, key), CryptoStreamMode.Write);
                    CStream.Write(data, 0, data.Length);//向加密流中写入数据
                    CStream.FlushFinalBlock();//将数据压入基础流
                    byte[] temp = MStream.ToArray();//从内存流中获取字节序列
                    CStream.Close();//关闭加密流
                    MStream.Close();//关闭内存流
    
                    return Encoding.Unicode.GetString(temp);//返回解密后的字符串
                }
                catch
                {
                    return str;
                }
            }
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  • 原文地址:https://www.cnblogs.com/nb08611033/p/9183198.html
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