Implementation of MD5 encryption and decryption methods in ASP.

This MD5 encryption, decryption method will be used.

　　

　　 Code memo when using:Response.Write (FormsAuthentication.HashPasswordForStoringInConfigFile ("The string to encrypt","MD5"));

The following is the encrypted, decrypted code section:

/*usage protected void Page_Load (object sender, EventArgs e) {//encrypt this.        Title = Cencrypt.desencrypt ("pwd", Cencrypt.key); This. Title + = Cencrypt.desdecrypt (this.        Title, Cencrypt.key);    Response.Write (Cencrypt.desdecrypt ("gayyhdlqunc=", Cencrypt.key)); } */usingSystem;usingSystem.IO;usingSystem.Text;usingSystem.Security.Cryptography;usingsystem.web;namespaceyd.common{/// <summary>    ///Add password class/// </summary>     Public classCencrypt {/// <summary>        ///Encrypt/// </summary>        /// <param name= "inputstring" ></param>        /// <returns></returns>         Public Static stringDesencrypt (stringinputstring) {            returndesencrypt (inputstring, Key); }        /// <summary>        ///decryption/// </summary>        /// <param name= "inputstring" ></param>        /// <returns></returns>         Public Static stringDesdecrypt (stringinputstring) {            returnDesdecrypt (inputstring, Key); }        /// <summary>        ///secret key/// </summary>        Private Static stringKey {Get            {                return "Hongye10"; }        }        /// <summary>        ///Encrypt string///Note: The key must be 8-bit/// </summary>        /// <param name= "StrText" >string</param>        /// <param name= "Encryptkey" >secret key</param>        /// <param name= "Encryptkey" >returns the encrypted string</param>         Public Static stringDesencrypt (stringInputString,stringEncryptkey) {            byte[] Bykey =NULL; byte[] IV = {0x12,0x34,0x56,0x78,0x90,0xAB,0xCD,0xEF }; Try{Bykey= System.Text.Encoding.UTF8.GetBytes (Encryptkey.substring (0,8)); DESCryptoServiceProvider des=NewDESCryptoServiceProvider (); byte[] Inputbytearray =Encoding.UTF8.GetBytes (inputstring); MemoryStream Ms=NewMemoryStream (); CryptoStream CS=NewCryptoStream (MS, Des.                CreateEncryptor (Bykey, IV), cryptostreammode.write); Cs. Write (Inputbytearray,0, inputbytearray.length); Cs.                FlushFinalBlock (); returnconvert.tobase64string (Ms.            ToArray ()); }            Catch(System.Exception error) {//return error. Message;                return NULL; }        }        /// <summary>        ///decrypting a string/// </summary>        /// <param name= "this.inputstring" >a dense string</param>        /// <param name= "Decryptkey" >secret key</param>        /// <param name= "Decryptkey" >returns the decrypted string</param>         Public Static stringDesdecrypt (stringInputString,stringDecryptkey) {            byte[] Bykey =NULL; byte[] IV = {0x12,0x34,0x56,0x78,0x90,0xAB,0xCD,0xEF }; byte[] Inputbytearray =NewByte[inputstring.length]; Try{Bykey= System.Text.Encoding.UTF8.GetBytes (Decryptkey.substring (0,8)); DESCryptoServiceProvider des=NewDESCryptoServiceProvider (); Inputbytearray=convert.frombase64string (inputstring); MemoryStream Ms=NewMemoryStream (); CryptoStream CS=NewCryptoStream (MS, Des.                CreateDecryptor (Bykey, IV), cryptostreammode.write); Cs. Write (Inputbytearray,0, inputbytearray.length); Cs.                FlushFinalBlock (); System.Text.Encoding Encoding=NewSystem.Text.UTF8Encoding (); returnencoding. GetString (Ms.            ToArray ()); }            Catch(System.Exception error) {//return error. Message;                return NULL; }        }    }}

Implementation of MD5 encryption and decryption methods in ASP.