using System; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Ink; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; using Microsoft.Phone.Controls; using System.Security.Cryptography; //创建人:vakin 时间:2011-12-15 namespace MicroBlogForWP7.Classes.Util { //将输入的字符串转换为字节数组 //然后使用ProtectedData以及预先定义的字节数组进行加密 //加密后得到的也是一个字节数据 //最后使用Convert.ToBase64String得到其对应的字符串 public class Encrypt { //预先定义的字节数组如下: byte[] opt = new byte[] { 1, 2, 4, 8, 16 }; /// <summary> /// 密码的加密操作 /// </summary> /// <param name="userpassword">未加密的密码内容</param> /// <returns></returns> private string EncryptPwd(string userpassword) { byte[] input = System.Text.Encoding.UTF8.GetBytes(userpassword); string result = Convert.ToBase64String(ProtectedData.Protect(input, opt)); return result; } /// <summary> /// 解密解码。没有加密的情况下返回null /// </summary> /// <param name="userpassword">加密后的密码内容</param> /// <returns></returns> private string DecryptPwd(string userpassword) { if (string.IsNullOrEmpty(userpassword)) { //没有加密的密码 return null; } byte[] output = Convert.FromBase64String(userpassword); byte[] en = ProtectedData.Unprotect(output, opt); string result = System.Text.Encoding.UTF8.GetString(en, 0, en.Length); return result; } } }