你的主頁或者你管理的網站有各種密碼需要保護，把密碼直接放在數據庫或者文件中存在不少安全隱患，所以密碼加密後存儲是最常見的做法。在ASP.NET中實現加密非常容易。.NET SDK中提供了CookieAuthentication類，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" %＞
＜html＞＜head＞
＜meta name="GENERATOR" Content="Microsoft Visual Studio 7.0"＞
＜meta name="CODE_LANGUAGE" Content="C#"＞＜/head＞
＜body＞
＜form method="post" runat="server"＞
＜asp:TextBox id=TextBox1 runat="server"＞＜/asp:TextBox＞
＜asp:Button id=Button1 runat="server" Text="encrypting"＞＜/asp:Button＞
Encrypting Password(MD5):
＜asp:Label id=MD5 runat="server"＞＜/asp:Label＞
＜/form＞
＜/body＞＜/html＞
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＞
/// Summary description for encrypting.
/// ＜/summary＞
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();
}
/// ＜summary＞
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// ＜/summary＞
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：類CookieAuthentication的namespace是System.Web.Security。
