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How to create Login Page with Mysql?

Posted on 2008-10-29
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1,630 Views
Last Modified: 2013-11-07
HI experts!
 I have created a database in mysql(smcofchristlogin)and a table called "login"  with fields (username,password).
In my aspx page  I created two textboxes(username, password) also I have a imagebutton called "logon"
Note : I am not using the Login controls in asp.net.

 So how to create a login page in such a way that when I press the  logon button, the program can go to my database and check if  the values from the textboxes are the same value from my table (username and password).
If there are not , write a message "You are not authorized to see this page" , by the way this is an asp  label.

I am using C# server side and Mysql
Thanks for your help

protected void Logon_Click(object sender, ImageClickEventArgs e)
    {
        string host = "localhost";
        string database = "smcofchristlogin";
        string user = "root";
        string password = "";
        string strSQL = "SELECT * FROM login";
 
        string strProvider = "Data Source=" + host + ";Database=" + database + ";User ID=" + user + ";Password=" + password;
        MySqlConnection mysqlCon = new MySqlConnection(strProvider);
        mysqlCon.Open();
        if (mysqlCon.State.ToString() == "Open")
        {
            MySqlCommand mysqlCmd = new MySqlCommand(strSQL, mysqlCon);
            MySqlDataReader mysqlReader = mysqlCmd.ExecuteReader();
 
 
        }
        mysqlCon.Close();
 
    }

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Comment
Question by:eddyperu
  • 4
  • 3
7 Comments
 
LVL 4

Author Comment

by:eddyperu
ID: 22834491
I create it , here is my code....Now I am looking for to do this(with my code) but in a more secure way, ..meaning....It will be hard for somebody to hack it

Thanks guys for your help :)

    protected void Logon_Click(object sender, ImageClickEventArgs e)
    {
        string host = "localhost";
        string database = "smcofchristlogin";
        string user = "root";
        string password = "";
       string strProvider = "Data Source=" + host + ";Database=" + database + ";User ID=" + user + ";Password=" + password;
       ReadMyData(strProvider);
}
    public void ReadMyData(string strProvider)
    {
 
        string strStoreProcedure = "select * from login where UserName='" + UserName.Text.Replace("'", "`") + "'and Password='" + Password.Text.Replace("'", "`") + "'";
 
 
        MySqlConnection mysqlConnection = new MySqlConnection(strProvider);
        MySqlCommand myCommand = new MySqlCommand(strStoreProcedure, mysqlConnection);
        mysqlConnection.Open();
        if (mysqlConnection.State.ToString() == "Open")
        {
            MySqlDataReader myReader;
            myReader = myCommand.ExecuteReader();
 
            while (myReader.Read())
            {
                Response.Redirect("Homepage.aspx");
            }
            myReader.Close();
 
        }
 
        lblErrorLogin.Text = "Sorry, you don't have acces to this page";
        mysqlConnection.Close();
 
 
    }

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LVL 5

Expert Comment

by:ionutz2k2
ID: 22838629
The most popular way to secure your login is by storing the passwords in the database encrypted with MD5 and to compare the MD5 string in the database with the MD5 string of your password at login. In this way you avoid mysql injection.
Hope this helps.
0
 
LVL 4

Author Comment

by:eddyperu
ID: 22843493
I saw that but I heard that it is to hack it....

If anybody knows how to load/save a MD5 hash into mysql using asp.NET 2.0(C#).
examples will be great, I ma new suing this programs...
Thanks
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LVL 4

Author Comment

by:eddyperu
ID: 22843496
..sorry I mean to easy to hack!
0
 
LVL 5

Expert Comment

by:ionutz2k2
ID: 22844594
I was just about to tell you to use 'mysql_real_escape_string' but i remembered you are using C# :).  So i did a little research an this is what i've come up with::

'PHP, if properly coded, is perfectly safe. SQL statements in your PHP code are unavoidable, and in fact encouraged if you're using MySQL, where the mysql_real_escape_string function works perfectly to prevent attacks of this sort. MSSQL, even in PHP, is another matter--stored procedures are the way to go, simply because there's no MS equivalent to mysql_real_escape_string, and this function won't block every possible attack on MSSQL.
So yes, basic good practices apply here too--if you MUST use embedded SQL statements, parameterize each and every variable before using it in the SQL statement. Otherwise, use stored procedures. In either case, use restricted logins that are only capable of doing what they absolutely must do--no need for your reporting system to have UPDATE, INSERT, or DELETE capabilities.'

Let me know if this answers your question.
0
 
LVL 4

Author Comment

by:eddyperu
ID: 22855951
Would you mind to send me a good tutorial about store procedure and how to use with MySQL...

I don't know how to code with PHP that is going to be a problem, isn't it?
thanks
0
 
LVL 5

Accepted Solution

by:
ionutz2k2 earned 2000 total points
ID: 22856392
Here are a couple of references:
http://dev.mysql.com/doc/refman/5.0/en/stored-routines.html
http://www.devshed.com/c/a/MySQL/A-DIY-Approach-to-Stored-Procedures-in-MySQL/
http://www.databasejournal.com/features/mysql/article.php/3525581
These articles should help you with creating and using stored procedures in MySQL.

Let me know if these links are what you need and if you have any other questions don't hesitate to ask.

P.S.: About PHP, it's not that hard to learn especially if you are already familiar with web programming.
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