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checklogin.php
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checklogin.php
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<?php
require_once 'connection.php';
$data = new dataClass();
if(isset($_POST['action']) && !empty($_POST['action'])) {
$action = $_POST['action'];
switch($action) {
case 'checkLogin' : $data->checkLogin(); break;
}
}
//startPHP
//////////////////
class dataClass
{
function checkLogin()
{
// username and password sent from form
$myusername=$_POST['myusername'];
$mypassword=$_POST['mypassword'];
// To protect MySQL injection (more detail about MySQL injection)
$myusername = stripslashes($myusername);
$myusername = mysql_real_escape_string($myusername);
$sql="SELECT * FROM user WHERE username='$myusername'";
$result=mysql_query($sql);
$currentUser = mysql_fetch_array($result);
$salt = $currentUser['salt'];
$mypassword = stripslashes($mypassword);
$mypassword = mysql_real_escape_string($mypassword);
//$saltedMD5Pass = md5($mypassword . $salt);
$saltedSHA256Pass = hash('sha256', $mypassword . $salt);
$sql="SELECT * FROM user WHERE username='$myusername' and password='$saltedSHA256Pass'";
$result=mysql_query($sql);
// Mysql_num_row is counting table row
$count=mysql_num_rows($result);
// If result matched $myusername and $mypassword, table row must be 1 row
if($count==1){
// Register $myusername, $mypassword and redirect to file "main.php"
//session_register("myusername");
$admin = $currentUser['admin'];
//change salt
//update md5 password
//****************************************
$salt = $this->generateSalt();
//$newSaltedMD5Pass = md5($mypassword . $salt);
$newSaltedSHA256Pass = hash('sha256', $mypassword . $salt);
$sql="UPDATE `user` SET `password`='$newSaltedSHA256Pass', `salt`='$salt' WHERE username='$myusername' and password='$saltedSHA256Pass'";
$result=mysql_query($sql);
//****************************************
session_start();
$_SESSION["myusername"] = $myusername;
$_SESSION["mypassword"] = $newSaltedSHA256Pass;
$_SESSION["admin"] = $admin;
echo "Success";
}
else {
//echo '<script language="javascript">alert("Wrong username or password!")</script>';
//header("location:index.php?something='blablabla'");
//send_to_host('','POST','/index.php','something=5');
//header("location:index.php");
echo "Login Failed<br>Wrong Username or Password";
}
}
function generateSalt($max = 64) {
$characterList = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%&*?";
$i = 0;
$salt = "";
while ($i < $max) {
$salt .= $characterList{mt_rand(0, (strlen($characterList) - 1))};
$i++;
}
return $salt;
}
}
?>