Cryptography，一个C#写的加解密算法的类-阿里云开发者社区

Cryptography，一个C#写的加解密算法的类

2017-11-08 1068

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简介：

一个加解密算法的类，如下：

  
 
Code
using System;
using System.IO;
using System.Security.Cryptography;

using System.Text;

namespace SurvIT.Business.UserPrivilege
 {
     /// <summary>   
     /// Symmtric Crypto   
     /// </summary>   
    public class RijndaelCrypto
     {
         private SymmetricAlgorithm _objCryptoService;
         private string _strKey = "Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7";
         private string _strIV = "E4ghj*Ghg7!rNIfb&95GUY86GfghUb#er57HBh(u%g6HJ($jhWk7&!hg4ui%$hjk";
         /// <summary>   
         /// Conctructor
         /// </summary>   
        public RijndaelCrypto(string key, string IV)
         {
             _objCryptoService = new RijndaelManaged();
             _objCryptoService = new TripleDESCryptoServiceProvider();
             _strKey = key;
             _strIV = IV;
         }
         public RijndaelCrypto()
         {
             _objCryptoService = new RijndaelManaged();
             _objCryptoService = new TripleDESCryptoServiceProvider();
         }
         /// <summary>   
         /// Get the key   
         /// </summary>   
         /// <returns>key</returns>   
        private byte[] GetLegalKey()
         {
             string sTemp = _strKey;
             _objCryptoService.GenerateKey();
             byte[] bytTemp = _objCryptoService.Key;
             int KeyLength = bytTemp.Length;
             if (sTemp.Length > KeyLength)
                 sTemp = sTemp.Substring(0, KeyLength);
             else if (sTemp.Length < KeyLength)
                 sTemp = sTemp.PadRight(KeyLength, ' ');
             return ASCIIEncoding.ASCII.GetBytes(sTemp);
         }
         /// <summary>   
         /// Initialize IV   
         /// </summary>   
         /// <returns>Initialize IV</returns>   
        private byte[] GetLegalIV()
         {
             _objCryptoService.GenerateIV();
             byte[] bytTemp = _objCryptoService.IV;
             int IVLength = bytTemp.Length;
             if (_strIV.Length > IVLength)
                 _strIV = _strIV.Substring(0, IVLength);
             else if (_strIV.Length < IVLength)
                 _strIV = _strIV.PadRight(IVLength, ' ');
             return ASCIIEncoding.ASCII.GetBytes(_strIV);
         }
         /// <summary>   
         /// Encrypto   
         /// </summary>   
         /// <param name="Source">The source string need to encrypto</param>   
         /// <returns>The string after crypto</returns>   
        public string Encrypto(string Source)
         {
             byte[] bytIn = UTF8Encoding.UTF8.GetBytes(Source);
             MemoryStream ms = new MemoryStream();
             _objCryptoService.Key = GetLegalKey();
             _objCryptoService.IV = GetLegalIV();
             ICryptoTransform encrypto = _objCryptoService.CreateEncryptor();
             using (CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write))
             {
                 cs.Write(bytIn, 0, bytIn.Length);
                 cs.FlushFinalBlock();
                 ms.Close();
                 byte[] bytOut = ms.ToArray();
                 string strRet = Convert.ToBase64String(bytOut);
                 cs.Clear();
                 return strRet;
             }
         }
         /// <summary>   
         /// Decrypto   
         /// </summary>   
         /// <param name="Source">The srouce need to decrypto</param>   
         /// <returns>The result string after decrypto</returns>   
        public string Decrypto(string Source)
         {
             byte[] bytIn = Convert.FromBase64String(Source);
             using (MemoryStream ms = new MemoryStream(bytIn, 0, bytIn.Length))
             {
                 _objCryptoService.Key = GetLegalKey();
                 _objCryptoService.IV = GetLegalIV();
                 ICryptoTransform encrypto = _objCryptoService.CreateDecryptor();
                 CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read);
                 StreamReader sr = new StreamReader(cs);
                 string strRet = sr.ReadToEnd();
                 cs.Clear();
                 return strRet;
             }
         }
     }
 }
  
 

用法如下：

Code
public static string EncryptoPassword(string pwd)
{
        RijndaelCrypto rijndael = new RijndaelCrypto();
        return rijndael.Encrypto(pwd);
}

public static string DecryptoPassword(string CryptoPwd)
{
       RijndaelCrypto rijndael = new RijndaelCrypto();
       return rijndael.Decrypto(CryptoPwd);
}

本文转自loose_went博客园博客，原文链接： http://www.cnblogs.com/michaelxu/archive/2009/06/03/1495746.html ，如需转载请自行联系原作者

Cryptography，一个C#写的加解密算法的类

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