Examples of how to use C # cryptography Classes

examples of how to use C # cryptography Classes

Using system;using system.io;using system.text;using system.security.cryptography;using System.Web;namespace  encryption.app_code{//<summary>//Plus password class///</summary> public class Encryption {//        <summary>//encryption///</summary>//<param name= "InputString" ></param> <returns></returns> public static string Desencrypt (String inputstring) {retur        N Desencrypt (inputstring, Key); }//<summary>//Decrypt//</summary>//<param name= "InputString" ></par            am>//<returns></returns> public static string Desdecrypt (string inputstring) {        Return Desdecrypt (inputstring, Key);            }///<summary>//key//</summary> private static string key {            get {return "Hongye10";    }    }///<summary>///encryption string///NOTE: The key must be 8 bits///</summary>//<param N Ame= "StrText" > String </param>//<param name= "Encryptkey" > Key </param>///<param name= "E        Ncryptkey "> returns the encrypted string </param> public static desencrypt string (string inputstring, String encryptkey)            {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 = new DESCryptoServiceProvider ();                byte[] Inputbytearray = Encoding.UTF8.GetBytes (inputstring);                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) {//return error.                Message;            return null; }}///<summary>//Decrypt string///</summary>//<param name= "this.inputst Ring > Secret string </param>//<param name= "Decryptkey" > Key </param>///<param name= "decry            Ptkey "> returns decrypted string </param> public static Desdecrypt string (string inputstring, String decryptkey) {            byte[] Bykey = null;            Byte[] IV = {0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF};            byte[] Inputbytearray = new Byte[inputstring.length];                try {bykey = System.Text.Encoding.UTF8.GetBytes (decryptkey.substring (0, 8));                DESCryptoServiceProvider des = new DESCryptoServiceProvider (); Inputbytearray = convert.frombase64sTring (inputstring);                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) {//return error.                Message;            return null; }        }    }}

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