asp.net|演算法 你的首頁或者你管理的網站有各種密碼需要保護，把密碼直接放在資料庫或者檔案中存在不少安全隱患，所以密碼加密後儲存是最常見的做法。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演算法。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">
<p> </p>
<p>
<asp:TextBox id=TextBox1 runat="server"></asp:TextBox>
<asp:Button id=Button1 runat="server" Text="encrypting"></asp:Button></p>
<p>Encrypting Password(MD5):
<asp:Label id=MD5 runat="server"></asp:Label></p>
</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。
