login-page2.axpx Source Code

login-page2.aspx Source Code

<%@ Page Language="C#" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Text" %>
<%@ Import Namespace="System.Security.Cryptography" %>

public void Page_Login(object sender, EventArgs e)
{
     if (!Page.IsPostBack)
     {
         txtNewUserName.Text = ;
         txtUserName.Text = ;
         litMessage.Text = ;
     }
}

public void btnLogin_Click(object sender, EventArgs e)
{
     string userName = txtUserName.Text;
     string pw = txtPassword.Text;
     string keyString = MySecretKey;
     byte[] key = Encoding.ASCII.GetBytes(
         keyString.ToCharArray( ));
     byte[] password = 
         Encoding.ASCII.GetBytes(
             pw.ToCharArray());
     HMACSHA1 hmac = new HMACSHA1(key);
     byte[] hash = hmac.ComputeHash(password);
     string b64 = userName + ; + Convert.ToBase64String(hash);
     
     string line = ;

StreamReader sr = new StreamReader
         (@e:\ectserver\sjost\Database\passwords2.txt);
     while(sr.Peek( ) > -1)
     {
         line = sr.ReadLine( );
         if (line == b64)
         {
             sr.Close( );
             Session[loggedin] = true;
             Response.Redirect(main-page2.aspx);
         }
     }
     sr.Close( );
     litMessage.Text = Login not successful.  Please try again.;
}

public void btnRegister_Click(object source, EventArgs e)
{
    string userName = txtNewUserName.Text;
    string passwordString = txtNewPassword.Text;
    string verifyPassword = txtVerifyPassword.Text;

string path = @e:\ectserver\sjost\Database\passwords2.txt;
    FileStream fs = new FileStream(path, FileMode.Append, 
                                         FileAccess.Write);
    StreamWriter sw = new StreamWriter(fs);
    if (passwordString == verifyPassword)
    {
        string keyString = MySecretKey;
        byte[] key = Encoding.ASCII.GetBytes(
            keyString.ToCharArray( ));
        byte[] password = 
            Encoding.ASCII.GetBytes(
                passwordString.ToCharArray());
        HMACSHA1 hmac = new HMACSHA1(key);
        byte[] hash = hmac.ComputeHash(password);
        string b64 = Convert.ToBase64String(hash);
        sw.WriteLine(userName + ; + b64);
        txtNewUserName.Text = ;
        txtUserName.Text = ;
        litMessage.Text = Registration successful.;
    }
    else
    {
        litMessage.Text = Password and verification do not match.;
    }
    sw.Close( );
}
</script>

<html>

<head>
<title>login-page2.aspx Example</title>
<link rel=stylesheet class=text/css href=examples.css />
<style class=text/css>
td      { padding-top:0.15cm; padding-bottom:0.15cm,;
          padding-left:0.5cm; padding-right:0.5cm; }
tr      { text-align:center; }
</style>
</head>

<body>

<h2>login-page2.aspx Example</h2>

<p>Use passwords encrypted using the SHA (Shared Hash Algorithm).</p>

</tr>
<tr>
    <td>Username</td>  <td>Username Registration</td>
</tr>
<tr>
    <td><asp:TextBox ID=txtPassword 
                     Width=150px
                     runat=server 
                     TabIndex=1
                     TextMode=Password />
    </td>
    <td><asp:TextBox ID=txtNewPassword 
                     Width=150px
                     TabIndex=4
                     runat=server 
                     TextMode=Password />
    </td>
</tr>
<tr>
    <td>Password</td>   <td>Password Registration</td>
</tr>
<tr>
    <td> </td>
    <td><asp:TextBox ID=txtVerifyPassword 
                     Width=150px
                     TabIndex=5
                     runat=server 
                     TextMode=Password />
    </td>

</tr>
<tr>
    <td> </td> <td>Password Verification</td>
</tr>
<tr>
    <td><asp:Button  ID=btnLogin 
                     runat=server
                     Width=150px
                     Text=Login 
                     TabIndex=2
                     OnClick=btnLogin_Click />
    </td>
    <td><asp:Button  ID=btnRegister 
                     runat=server
                     Width=150px
                     TabIndex=6
                     Text=Register 
                     OnClick=btnRegister_Click />
    </td>
</tr>
</table>

</body>
</html>