一段asp.net DES加密解密的代码-木庄网络博客

本文摘自PHP中文网，作者怪我咯，侵删。

//加密

public string DesEncrypt(string strText, string strEncrKey) 
 { 
  byte[] byKey=null; 
  byte[] IV= {0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF}; 
  try
  { 
   byKey = System.Text.Encoding.UTF8.GetBytes(strEncrKey.Substring(0,8)); 
   DESCryptoServiceProvider des = new DESCryptoServiceProvider(); 
   byte[] inputByteArray =System.Text.Encoding.UTF8.GetBytes(strText); 
   MemoryStream ms = new MemoryStream(); 
   CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write) ; 
   cs.Write(inputByteArray, 0, inputByteArray.Length); 
   cs.FlushFinalBlock(); 
   return Convert.ToBase64String(ms.ToArray()); 
  } 
  catch(System.Exception error) 
  { 
   MessageBox.Show(error.Message); 
   return "error:" +error.Message+"/r"; 
  } 
 }

//解密

public string DesDecrypt(string strText,string sDecrKey) 
 { 
  byte[] byKey = null; 
  byte[] IV= {0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF}; 
  byte[] inputByteArray = new Byte[strText.Length]; 
  try
  { 
   byKey = System.Text.Encoding.UTF8.GetBytes(sDecrKey.Substring(0,8)); 
   DESCryptoServiceProvider des = new DESCryptoServiceProvider(); 
   inputByteArray = Convert.FromBase64String(strText); 
   MemoryStream ms = new MemoryStream(); 
   CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write); 
   cs.Write(inputByteArray, 0, inputByteArray.Length); 
   cs.FlushFinalBlock(); 
   System.Text.Encoding encoding = new System.Text.UTF8Encoding(); 
   return encoding.GetString(ms.ToArray()); 
  } 
  catch(System.Exception error) 
  { 
   MessageBox.Show(error.Message); 
   return "error:"+error.Message+"/r"; 
  } 
 }