sql >> Database >  >> RDS >> Mysql

Script wil niet inloggen

Ik zou die tutorial schrappen, login-beveiliging moet niet lichtvaardig worden bekeken, je zou geen leesbare wachtwoorden in de database moeten hebben, ze zouden met een zout moeten worden gehasht en beide zouden moeten veranderen na succesvolle login.

Hier is een beveiligd login-script:

Het gebruikt PDO voor de databaseverbinding, het eigenlijke inlogformulier gebruikt willekeurige sleutels om in te loggen, bijvoorbeeld. geen gebruikersnaam/wachtwoord. Wachtwoorden worden gehasht met sha512 x 25k keer en met een 16byte key salt, brute force-bescherming. Hoop dat het helpt. 

<?php
session_start();

/**
 * Table

CREATE TABLE IF NOT EXISTS `users` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `username` varchar(45) DEFAULT NULL,
  `pass_hash` varchar(255) DEFAULT NULL,
  `pass_salt` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=0 ;

 */

//DB Stuff
define('DBHOST','localhost');
define('DBNAME','yourdb');
define('DBUSER','root');
define('DBPASS','');
//End Config:---


//Open a PDO Database connection
try {
    $db = new PDO("mysql:host=".DBHOST.";dbname=".DBNAME, DBUSER, DBPASS);
    $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
}catch (Exception $e){
    die('Cannot connect to mySQL server.');
}


class Login{
    public $db;
    public $user;
    public $pass;
    public $error;
    // sha512
    public $algo = '$6';
    // Cost parameter, 25k iterations
    public $cost = '$rounds=25000$';

    function __construct(PDO $db){
        $this->db = $db;
        $this->global_salt = sha1($_SERVER['HTTP_HOST']);
    }

    /**
     * Return a random seed for the mt_rand function
     */
    function make_seed(){
        list($usec, $sec) = explode(' ', microtime());
        return (float) $sec + ((float) $usec * 100000);
    }

    /**
     * Return a random unique salt for new created hash/crypt function salts
     */
    function unique_salt(){
        $salt = null;
        mt_srand($this->make_seed());
        for($i=0;$i < mt_rand(1,10);$i++){
            $salt = sha1($this->global_salt.$salt.mt_rand().uniqid().microtime(true));
        }
        return substr($salt,0,16);
    }

    /**
     * Hash a given password and store parts in:
     * $this->salt = a unique 16 byte salt
     * $this->hash = The full crypted hash sting including algo/cost/salt/crytedpassword
     * $this->full_salt = Just algo/cost/salt section, the first 33 bytes 
     * $this->hashed_password = Just crytedpassword section, proceeding bytes after first 33 bytes
     * 
     */
    function hash($password){
        $this->salt = $this->unique_salt();
        $this->full_hash = crypt($password, $this->algo.$this->cost.$this->salt);
        $this->full_salt = substr($this->full_hash, 0, 33);
        $this->hashed_password = substr($this->full_hash, 33);
        return $this->full_hash;
    }

    /**
     * Method to validate the given crypto hash against the given password
     */
    function check_password($hash, $salt, $password){
        $hash = ($this->algo.$this->cost.$salt.'$'.$hash);
        if($hash == crypt($password, substr($hash, 0, 33))){
            //Regenerate new hash and salt for given password
            $this->update_keys();
            $this->status = true;
            $_SESSION['logged_in']=true;
            return true;
        }else{
            $this->status = false;
            return false;
        }
    }

    /**
     * Set error
     */
    function set_error($type,$value){
        $this->error[$type]=$value;
    }

    /**
     * Output error
     */
    function error($type){
        echo (isset($this->error[$type]))?$this->error[$type]:null;
    }

    /**
     * Logout and regenirate session and redirect to index
     */
    static function logout(){
        unset($_SESSION['logged_in']);
        session_regenerate_id(true);
        exit(header('Location: ./index.php'));
    }

    function anti_brute($intval){
        if(!isset($_SESSION['access_time'])){
            $_SESSION['access_time']=time();
        }else{
            $t = time()-$_SESSION['access_time'];
            if($t <= $intval){
                $this->set_error('global','Time violation');
                $_SESSION['access_time']=time();
                return true;
            }
            $_SESSION['access_time']=time();
            return false;
        }
    }

    function process_login(){
        if($_SERVER['REQUEST_METHOD']=='POST'){

            $this->user   = (isset($_SESSION['userParam']) && isset($_POST[$_SESSION['userParam']]))?$_POST[$_SESSION['userParam']]:null;
            $this->pass   = (isset($_SESSION['passParam']) && isset($_POST[$_SESSION['passParam']]))?$_POST[$_SESSION['passParam']]:null;
            $this->create = (isset($_SESSION['createParam']) && isset($_POST[$_SESSION['createParam']]))?$_POST[$_SESSION['createParam']]:null;

            $cont = true;
            if($this->user == null || strlen($this->user) <= 2){$this->set_error('user','Please enter a username!'); $cont=false;}
            if($this->pass == null || strlen($this->pass) <= 2){$this->set_error('pass','Please enter a password!'); $cont=false;}


            if($cont==true){
                //Alls good continue
                if($this->create != null && $this->create=='1'){
                    //Check user for new account
                    if($this->check_user()==true){$this->set_error('user','Username already taken.');return;}
                    //Create account
                    $this->create_account();
                }else{
                    //Stop really fast request 2 seconds
                    if($this->anti_brute(2)==false){
                        //Attempt to login
                        $this->check_login();
                    }
                }
            }else{
                //Error with form
                $this->set_error('global','Please fill in login form!');
            }
        }
    }

    function check_user(){
        $sql = 'SELECT 1 FROM users WHERE username=:username';
        $statement = $this->db->prepare($sql);
        $statement->bindParam(':username', $this->user, PDO::PARAM_STR);
        $statement->execute();
        $result = $statement->fetch(PDO::FETCH_ASSOC);

        if(!empty($result)){return true;}else{return false;}
    }

    function check_login(){
        $sql = 'SELECT pass_hash, pass_salt FROM users WHERE username=:username';
        $statement = $this->db->prepare($sql);
        $statement->bindParam(':username', $this->user, PDO::PARAM_STR);
        $statement->execute();
        $result = $statement->fetch(PDO::FETCH_ASSOC);

        $this->check_password($result['pass_hash'], $result['pass_salt'], $this->pass);
    }

    function create_account(){
        //Create new account
        $this->hash($this->pass);
        $sql = 'INSERT into users (username, pass_hash, pass_salt) VALUES (:username, :pass_hash, :pass_salt)';
        $statement = $this->db->prepare($sql);
        $statement->bindParam(':username', $this->user, PDO::PARAM_STR);
        $statement->bindParam(':pass_hash', $this->hashed_password, PDO::PARAM_STR);
        $statement->bindParam(':pass_salt', $this->salt, PDO::PARAM_STR);
        $statement->execute();

        $this->status = true;
        $_SESSION['logged_in']=true;
    }

    function update_keys(){
        //Update account password hash & salt
        $this->hash($this->pass);
        $sql = 'UPDATE users SET pass_hash=:pass_hash, pass_salt=:pass_salt WHERE username=:username';
        $statement = $this->db->prepare($sql);
        $statement->bindParam(':username', $this->user, PDO::PARAM_STR);
        $statement->bindParam(':pass_hash', $this->hashed_password, PDO::PARAM_STR);
        $statement->bindParam(':pass_salt', $this->salt, PDO::PARAM_STR);
        $statement->execute();

        $this->status = true;
        $_SESSION['logged_in']=true;
    }

}//END Login class

//Logout handler
if(isset($_GET['logout'])){ Login::logout(); }

$login = new Login($db);

//Login handler
$login->process_login();

//Debug
echo '<pre>';
print_r($login);
echo '</pre>';


//Check login status
if(isset($_SESSION['logged_in']) && $_SESSION['logged_in']==true){
    //Logged in
    echo '<a href="?logout">Logout</a>';
}else{
    //Not Logged In

    //Show login form & create uniqie parrams for user/pass/create post keys
    $_SESSION['userParam']   = sha1(uniqid().microtime(true));
    $_SESSION['passParam']   = sha1(uniqid().microtime(true));
    $_SESSION['createParam'] = sha1(uniqid().microtime(true));
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Secure Login</title>
</head>

<body>
<h1>Secure Login Example</h1>
<h3>Please login:</h3>

<?php $login->error('global'); ?>

<form method="POST" action="">
  <label for="user">Username :&nbsp; </label>
  <input type="text" name="<?=$_SESSION['userParam'];?>" size="29"> <?php $login->error('user'); ?>
  <br />
  <label for="pass">Password :&nbsp; </label>
  <input type="text" name="<?=$_SESSION['passParam'];?>" size="29"> <?php $login->error('pass'); ?>
  <br /> 
  <input type="submit" value="Login">&nbsp; and create my account:<input type="checkbox" name="<?=$_SESSION['createParam'];?>" value="1">
</form>
</body>
</html>
<?php } ?>
';//Controleer login statusif(isset($_SESSION['logged_in']) &&$_SESSION['logged_in']==true){ //Ingelogd echo 'Uitloggen ';}else{ //Niet ingelogd //Toon aanmeldingsformulier &maak uniqie-parrams voor gebruiker/pas/postsleutels maken $_SESSION['userParam'] =sha1(uniqid().microtime(true)); $_SESSION['passParam'] =sha1(uniqid().microtime(true)); $_SESSION['createParam'] =sha1(uniqid().microtime(true));?>Beveiligde aanmelding

Beveiligd aanmeldingsvoorbeeld

Log in:

error('algemeen'); ?>
error('user'); ?>
error('pass'); ?>
  en maak mijn account aan:



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