ASP.NET中密码保护

ASP.NET中密码保护，MD5和SHA1算法的使用

你的主页或者你管理的网站有各种密码需要保护，把密码直接放在数据库或者文件中存在不少安全隐患，所以密码加密后存储是最常见的做法。在ASP.NET中实现加密非常容易。.NET SDK中提供了CookieAuthentication类，其中的HashPasswordForStoringInConfigFile方法可直接使用MD5和SHA1算法。例子如下：
file: encrypting.aspx
<%@ Page language="c#" Codebehind="encrypting.cs" AutoEventWireup="false" Inherits="encrypting.encrypting" %>

    
    
  

    

 

Encrypting Password(MD5):

     

  

file:encrypting.cs

namespace encrypting
{
    using System;
    using System.Collections;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Web;
    using System.Web.SessionState;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using System.Web.UI.HtmlControls;
    using System.Web.Security;
    ///

    ///    Summary description for encrypting.
    ///

    public class encrypting : System.Web.UI.Page
    {
  protected System.Web.UI.WebControls.Label MD5;
  protected System.Web.UI.WebControls.Button Button1;
  protected System.Web.UI.WebControls.TextBox TextBox1;

public encrypting()
{
     Page.Init += new System.EventHandler(Page_Init);
        }
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                //
                // Evals true first time browser hits the page
                //
            }
        }
        protected void Page_Init(object sender, EventArgs e)
        {
            //
            // CODEGEN: This call is required by the ASP+ Windows Form Designer.
            //
            InitializeComponent();
        }
        ///

        ///    Required method for Designer support - do not modify
        ///    the contents of this method with the code editor.
        ///

        private void InitializeComponent()
  {
   Button1.Click += new System.EventHandler (this.Button1_Click);
   this.Load += new System.EventHandler (this.Page_Load);
  }
  public void Button1_Click (object sender, System.EventArgs e)
  {
   MD5.Text = CookieAuthentication.HashPasswordForStoringInConfigFile(TextBox1.Text,"MD5");
   //SHA1 use CookieAuthentication.HashPasswordForStoringInConfigFile(TextBox1.Text,"SHA1");
  }
    }
}
注意：类CookieAuthentication的namespace是System.Web.Security。