using System;
using System.Security.Cryptography;
using System.Text;

namespace Infrastructure
{
 public class Encryption
 {
 private static string encryptKey = "4h!@w$rng,i#$@x1%)5^3(7*5P31/Ee0";

 //默认密钥向量
 private static byte[] Keys = { 0x41, 0x72, 0x65, 0x79, 0x6F, 0x75, 0x6D, 0x79, 0x53, 0x6E, 0x6F, 0x77, 0x6D, 0x61, 0x6E, 0x3F };
 /// <summary>
 /// 加密
 /// </summary>
 /// <param name="encryptString"></param>
 /// <returns></returns>
 public static string Encrypt(string encryptString)
 {
 if (string.IsNullOrEmpty(encryptString))
 return string.Empty;
 RijndaelManaged rijndaelProvider = new RijndaelManaged();
 rijndaelProvider.Key = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 32));
 rijndaelProvider.IV = Keys;
 ICryptoTransform rijndaelEncrypt = rijndaelProvider.CreateEncryptor();

 byte[] inputData = Encoding.UTF8.GetBytes(encryptString);
 byte[] encryptedData = rijndaelEncrypt.TransformFinalBlock(inputData, 0, inputData.Length);

 return Convert.ToBase64String(encryptedData);
 }
 /// <summary>
 /// 解密
 /// </summary>
 /// <param name="decryptString"></param>
 /// <returns></returns>
 public static string Decrypt(string decryptString)
 {
 if (string.IsNullOrEmpty(decryptString))
 return string.Empty;
 try
 {
 RijndaelManaged rijndaelProvider = new RijndaelManaged();
 rijndaelProvider.Key = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 32));
 rijndaelProvider.IV = Keys;
 ICryptoTransform rijndaelDecrypt = rijndaelProvider.CreateDecryptor();

 byte[] inputData = Convert.FromBase64String(decryptString);
 byte[] decryptedData = rijndaelDecrypt.TransformFinalBlock(inputData, 0, inputData.Length);

 return Encoding.UTF8.GetString(decryptedData);
 }
 catch
 {
 return "";
 }
 }
 }
}