简单的C#.NET 字符串加解密程序

昨天韩国总部来人对网站进行了Security Review, 看到很多链接字符串我们都没有加密,批评了一下。

要把之前用的字符串加解密程序拿出来用用了,顺便共享,希望能帮助需要的朋友:

加密算法使用3DES,key经过MD5哈希过,强度应该能满足一般需要了,代码很少,很方便:

using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;

namespace NOP.Security
{
    
public class Encrypt
    {
        
public static string DecryptString(string strText, string key)
        {
            
byte[] buffer = new MD5CryptoServiceProvider().ComputeHash(Encoding.ASCII.GetBytes(key));
            TripleDESCryptoServiceProvider provider 
= new TripleDESCryptoServiceProvider();
            provider.Key 
= buffer;
            provider.Mode 
= CipherMode.ECB;
            
byte[] inputBuffer = Convert.FromBase64String(strText);
            
return Encoding.ASCII.GetString(provider.CreateDecryptor().TransformFinalBlock(inputBuffer, 0, inputBuffer.Length));
        }

        
public static string DecryptUTF8String(string strText, string key)
        {
            
byte[] buffer = new MD5CryptoServiceProvider().ComputeHash(Encoding.UTF8.GetBytes(key));
            TripleDESCryptoServiceProvider provider 
= new TripleDESCryptoServiceProvider();
            provider.Key 
= buffer;
            provider.Mode 
= CipherMode.ECB;
            
byte[] inputBuffer = Convert.FromBase64String(strText);
            
return Encoding.UTF8.GetString(provider.CreateDecryptor().TransformFinalBlock(inputBuffer, 0, inputBuffer.Length));
        }

        
public static string EncryptString(string strText, string key)
        {
            
byte[] buffer = new MD5CryptoServiceProvider().ComputeHash(Encoding.ASCII.GetBytes(key));
            TripleDESCryptoServiceProvider provider 
= new TripleDESCryptoServiceProvider();
            provider.Key 
= buffer;
            provider.Mode 
= CipherMode.ECB;
            
byte[] bytes = Encoding.ASCII.GetBytes(strText);
            
string str = Convert.ToBase64String(provider.CreateEncryptor().TransformFinalBlock(bytes, 0, bytes.Length));
            provider 
= null;
            
return str;
        }

        
public static string EncryptUTF8String(string strText, string key)
        {
            
byte[] buffer = new MD5CryptoServiceProvider().ComputeHash(Encoding.UTF8.GetBytes(key));
            TripleDESCryptoServiceProvider provider 
= new TripleDESCryptoServiceProvider();
            provider.Key 
= buffer;
            provider.Mode 
= CipherMode.ECB;
            
byte[] bytes = Encoding.UTF8.GetBytes(strText);
            
string str = Convert.ToBase64String(provider.CreateEncryptor().TransformFinalBlock(bytes, 0, bytes.Length));
            provider 
= null;
            
return str;
        }
    }

} 

posted @ 2009-10-23 13:20  LanceZhang  阅读(4711)  评论(9编辑  收藏  举报