DES加密解密

using System;using System.IO;using System.Security.Cryptography;using System.Text;namespace DES{ class Program { static byte[] rgbIV = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 }; /// <summary> /// 加密 /// </summary> /// <param name="oriText">明文</param> /// <param name="key">密钥</param> /// <returns>密文</returns> static string Encrypt(string oriText, string key) { MemoryStream memoryStream = new MemoryStream(); DESCryptoServiceProvider des = new DESCryptoServiceProvider(); byte[] rgbKey = Encoding.ASCII.GetBytes(key.Substring(0, 8)); CryptoStream cryptoStream = new CryptoStream(memoryStream, des.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write); StreamWriter sw = new StreamWriter(cryptoStream); sw.Write(oriText); sw.Close(); cryptoStream.Close(); return Convert.ToBase64String(memoryStream.ToArray()); } /// <summary> /// 解密 /// </summary> /// <param name="encText">密文</param> /// <param name="key">密钥</param> /// <returns>密文</returns> static string Decrypt(string encText, string key) { MemoryStream memoryStream = new MemoryStream(Convert.FromBase64String(encText)); DESCryptoServiceProvider des = new DESCryptoServiceProvider(); byte[] rgbKey = Encoding.ASCII.GetBytes(key.Substring(0, 8)); CryptoStream cryptoStream = new CryptoStream(memoryStream, des.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Read); StreamReader sr = new StreamReader(cryptoStream); return sr.ReadToEnd(); } static void Main(string[] args) { string key = "12345678"; string oriText = "你好abc世界！"; string encText = Encrypt(oriText, key); Console.WriteLine("Encryted Text: " + encText); Console.WriteLine("Original Text: " + Decrypt(encText, key)); Console.ReadKey(); //Output: //Encryted Text: D566iVs2gfArjSK+cBms9bk2AYuj9AOQ //Original Text: 你好abc世界！ } }}