ASP.NET中MD5加密实例讲解

<%@ Page Language="C#" ContentType="text/html"%>
<%@ Import Namespace="System"%>
<script language="C#" runat="server">
void Page_Load(Object sender,EventArgs e){
//获取要加密的字段,并转化为Byte[]数组
byte[] data=System.Text.Encoding.Unicode
.GetBytes(source.Text.ToCharArray());
//建立加密服务
System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
//加密Byte[]数组
byte[] result= md5.ComputeHash(data);
//将加密后的数组转化为字段
string sResult=System.Text.Encoding.Unicode.GetString(result);
//显示出来
sha1_1.Text="MD5普通加密:"+sResult.ToString()+"<br/>";
//作为密码方式加密
string EnPswdStr=System.Web.Security.FormsAuthentication.
HashPasswordForStoringInConfigFile(source.Text.ToString(),"MD5");
//显示出来
sha1_2.Text="MD5密码加密:"+EnPswdStr+"<br/>";
}
</script>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>测试</title>
</head>
<body>
<h3>SHA1加密</h3>
<form runat="server">
<asp:label id="sha1_1" runat="server"></asp:label>
<asp:label id="sha1_2" runat="server"></asp:label>
<asp:textbox ID="source" runat="server" TextMode="SingleLine" Text="test" AutoPostBack="true" />
(回车)
</form>
</body>
</html>
 

其实在ASP.Net编程中,不用调用md5.asp来加密数据。在DotNet中有自带的类:System.Web.Security.HashPasswordForStoringInConfigFile()

public string md5(string str,int code)
{
if(code==16) //16位MD5加密(取32位加密的9~25字符)
{
return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str,"MD5").ToLower().Substring(8,16) ;
}

if(code==32) //32位加密
{
return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str,"MD5").ToLower();
}

return "00000000000000000000000000000000"; }

简单的使用

头文件:using System.Web.Security;

初始化数据库里的字段

 string strPwd=FormsAuthentication.HashPasswordForStoringInConfigFile(this.tbox_Pwd.Text,"MD5");


ASP.NET中加密与解密QueryString的方法

 

转载;

1.加密。

  Response.Redirect("DetailInfo.aspx?id=" + Convert.ToBase64String(System.Text.Encoding.Default.GetBytes("sp10006")).Replace("+","%2B"));

  2.解密。

  string ID = System.Text.Encoding.Default.GetString(Convert.FromBase64String(Request.QueryString["id"].ToString().Replace("%2B","+")));


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