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
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1@ Page language="c#" Codebehind="encrypting.cs" AutoEventWireup="false" Inherits="encrypting.encrypting"
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1<html><head><br/>
2<meta content="Microsoft Visual Studio 7.0" name="GENERATOR"/><br/>
3<meta content="C#" name="CODE_LANGUAGE"/></head><br/>
4<body><br/>
5<br/>
6<form method="post" runat="server"><br/>
7<p> </p><br/>
8<p><br/>
9<asp:textbox id="TextBox1" runat="server"></asp:textbox><br/>
10<asp:button id="Button1" runat="server" text="encrypting"></asp:button></p><br/>
11<p>Encrypting Password(MD5):<br/>
12<asp:label id="MD5" runat="server"></asp:label></p><br/>
13</form><br/>
14<br/>
15</body></html>
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file:encrypting.cs
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namespace encrypting
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{
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using System;
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using System.Collections;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Web;
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using System.Web.SessionState;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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using System.Web.UI.HtmlControls;
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using System.Web.Security;
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///
1<summary><br/>
2/// Summary description for encrypting.<br/>
3/// </summary>
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public class encrypting : System.Web.UI.Page
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{
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protected System.Web.UI.WebControls.Label MD5;
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protected System.Web.UI.WebControls.Button Button1;
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protected System.Web.UI.WebControls.TextBox TextBox1;
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public encrypting()
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{
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Page.Init += new System.EventHandler(Page_Init);
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}
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protected void Page_Load(object sender, EventArgs e)
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{
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if (!IsPostBack)
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{
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//
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// Evals true first time browser hits the page
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//
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}
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}
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protected void Page_Init(object sender, EventArgs e)
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{
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//
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// CODEGEN: This call is required by the ASP+ Windows Form Designer.
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//
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InitializeComponent();
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}
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///
1<summary><br/>
2/// Required method for Designer support - do not modify<br/>
3/// the contents of this method with the code editor.<br/>
4/// </summary>
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private void InitializeComponent()
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{
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Button1.Click += new System.EventHandler (this.Button1_Click);
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this.Load += new System.EventHandler (this.Page_Load);
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}
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public void Button1_Click (object sender, System.EventArgs e)
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{
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MD5.Text = CookieAuthentication.HashPasswordForStoringInConfigFile(TextBox1.Text,"MD5");
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//SHA1 use CookieAuthentication.HashPasswordForStoringInConfigFile(TextBox1.Text,"SHA1");
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}
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}
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}
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注意：类CookieAuthentication的namespace是System.Web.Security。