DES加解密算法的实例

1、using System;using System.Text;using System.IO;namespace ConsoleApplication2 class Program static void Main(string args) / DESCryptoServiceProvider desCry= new DESCryptoServiceProvider(); / desCry.GenerateKey(); / desCry.GenerateIV(); / byte key = desCry.Key; / byte iv = desCry.IV; / UnicodeEncoding

2、 cncoder = new UnicodeEncoding(); / string s = cncoder.GetString(key); / string ivs = cncoder.GetString(iv); / Console.WriteLine(ivs); / Console.WriteLine(s); / Console.WriteLine(key.LongLength); / Console.WriteLine(ivs.Length); /ÓÃDESËã·¨¼ÓÃÜ string

3、 s = "12345" string key = "abcdefgh" string iv = "abcdefgh" ASCIIEncoding ASC = new ASCIIEncoding(); byte keys = ASC.GetBytes(key); byte ivs = ASC.GetBytes(iv); DESCryptoServiceProvider des = new DESCryptoServiceProvider(); des.Key = keys; des.IV = ivs; FileStream files

4、tream = new FileStream("des.txt", FileMode.Create); CryptoStream crytostream = new CryptoStream(filestream, des.CreateEncryptor(keys, ivs), CryptoStreamMode.Write); StreamWriter writer = new StreamWriter(crytostream); writer.WriteLine(s); writer.Close(); /DES½âÃÜË&

5、#227;·¨using System;using System.Text;using System.IO;namespace ConsoleApplication2 class Program static void Main(string args) / DESCryptoServiceProvider desCry= new DESCryptoServiceProvider(); / desCry.GenerateKey(); / desCry.GenerateIV(); / byte key = desCry.Key; / byte iv = desCry.IV;

6、/ UnicodeEncoding cncoder = new UnicodeEncoding(); / string s = cncoder.GetString(key); / string ivs = cncoder.GetString(iv); / Console.WriteLine(ivs); / Console.WriteLine(s); / Console.WriteLine(key.LongLength); / Console.WriteLine(ivs.Length); /ÓÃDESËã·¨½â&#

7、195;Ü string key = "abcdefgh" string iv = "abcdefgh" ASCIIEncoding ASC = new ASCIIEncoding(); byte keys = ASC.GetBytes(key); byte ivs = ASC.GetBytes(iv); DESCryptoServiceProvider des = new DESCryptoServiceProvider(); des.Key = keys; des.IV = ivs; FileStream filestream = new FileStream("des.txt", FileMode.Open); CryptoStream cryStream = new CryptoStream(filestream, des.CreateDecryptor(), CryptoStr