Cryptography,一个C#写的加解密算法的类

时间:2023-02-02 21:16:11

一个加解密算法的类,如下:

 

Cryptography,一个C#写的加解密算法的类Cryptography,一个C#写的加解密算法的类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:

Cryptography,一个C#写的加解密算法的类Cryptography,一个C#写的加解密算法的类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);
}