一段asp.net DES加密解密的代碼

//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";    }   }