Home > Developer > ASP

Asp. NET Encryption Password Method Example _ practical skills

Source: Internet
Author: User
Tags md5 sha1
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

Whenever we want to build a database-driven personalized web site, we must protect the user's data. Although hackers can steal a person's password, the more serious problem is that someone can steal the entire database, and then immediately all the passwords.

Principle

It is a good practice not to store the actual passwords in the database, but to store their encrypted versions. When we need to authenticate the user, we simply encrypt the user's password and then compare it to the encrypted password in the system.

In ASP, we have to use external objects to encrypt strings. and the. NET SDK solves this problem, It provides a HashPasswordForStoringInConfigFile method in the FormsAuthentication class in the System.Web.Security namespace, which is intended to encrypt the object stored in the form form, as the name suggests. Password.

Example

The HashPasswordForStoringInConfigFile method is very simple to use, and it supports the "SHA1" and "MD5" hashing algorithms used to encrypt strings. To see the power of the "HashPasswordForStoringInConfigFile" method, let's create a small asp.net page and encrypt the string into SHA1 and MD5 format.

The following is a asp.net page source code:

aspx file:

Copy Code code as follows:

<%@ Page language= "C #" codebehind= "Loginform.aspx.cs" autoeventwireup= "false" inherits= "Konson.log.loginform"% >
<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 transitional//en" >
<HTML>
<HEAD>
<title>loginform</title>
<meta name= "generator" content= "Microsoft Visual Studio 7.0" >
<meta name= "Code_language" content= "C #" >
<meta name= "vs_defaultClientScript" content= "JavaScript" >
<meta name= "vs_targetschema" content= "http://schemas.microsoft.com/intellisense/ie5" >
</HEAD>
<body ms_positioning= "GridLayout" >
<form id= "LoginForm" method= "POST" runat= "Server" >
<table style= "WIDTH:205PX; Height:86px ">
<tr>
&LT;TD style= "width:78px" > sign-in name </td>
<td><asp:textbox id= "userid" runat= "Server" width= "101px" ></asp:TextBox></td>
</tr>
<tr>
&LT;TD style= "width:78px" > Password </td>
<td><asp:textbox id= "pwd" runat= "server" width= "101px" ></asp:TextBox></td>
</tr>
<tr>
&LT;TD style= "width:78px" ><asp:button id= "Login" runat= "server" text= "Log In" ></asp:Button></td>
<td><asp:button id= "Cancel" runat= "Server" text= "Cancel" ></asp:Button></td>
</tr>
</table>
</form>
</body>
</HTML>

Code behind file:

Copy Code code as follows:

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;

Namespace Konson.log
{
public class Loginform:System.Web.UI.Page
{
protected System.Web.UI.WebControls.TextBox userid;
protected System.Web.UI.WebControls.Button login;
protected System.Web.UI.WebControls.Button Cancel;
protected System.Web.UI.WebControls.TextBox pwd;
String epwd;
private void Page_Load (object sender, System.EventArgs e)
{}
#region Web Form Designer generated code
Override protected void OnInit (EventArgs e)
{
InitializeComponent ();
Base. OnInit (e);
}

private void InitializeComponent ()
{
This.login.Click + = new System.EventHandler (This.login_click);
This. Load + = new System.EventHandler (this. Page_Load);
}
#endregion

private void Login_click (object sender, System.EventArgs e)
{
Epwd=formsauthentication.hashpasswordforstoringinconfigfile (pwd. Text, "SHA1");
Epwd=formsauthentication.hashpasswordforstoringinconfigfile (pwd. Text, "MD5");
Response.Write (EPWD);
}
}
}


In the code above, you just have to write the encrypted epwd string when the database is OK. Encrypted passwords are so simple.

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
net password encryption asp net password textbox net aes encryption example asp net smtpclient example asp net gridview example asp net button example asp net page example
Related Article
ASP. NET core combined with consul cluster &docker to rea...
ASP. NET Core SignalR uses a generic hub to gracefully invoke...
ASP. NET Core 2.0 leverages Masstransit integrated RABBITMQ
Integration testing of ASP. NET Core Webapi using Xunit
CKEDITOR + CKFINDER image upload configuration (C #/asp.net/php)

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

What's Trending
Top 10 Tags
datastax versions naming convention zookeeper client class definition md5 microsoft sql server 2005 data structures exception handling error handling
Top 10 Keywords
microsoft download center down wordpress address url site address url wordpress address url windows installer 4 0 download 302 not found web address url definition site address url wordpress db2 integer mac os installation step by step pdf abbreviation for return

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More