Login and Cookies

ibnclaudius · December 11, 2011

Not sure if everything is working right because I am in the school computer and here I can not install apache / php / etc.

I'm not sure about how to use cookies.

Here is my code, any errors or suggestions just talk. Probably does not work, because as I said, not yet tested.

login.php

<?php

session_start();

include 'class.php';

if (isset($_POST['username']) && isset($_POST['password'])) {
$user  = new User($_POST['username']);
if ($user->exists()) {
	$login = $user->login($_POST['password']);
	if ($login) {
		$_SESSION['user_id'] = $login;
		session_write_close();
	} else {
		echo "Login failed.";
	}
} else {
	header("Location: register.php");
}
}

?>

<!DOCTYPE html>
<html>
<head>
	<title>Login Form</title>
</head>
<body>
	<form action="" method="post">
		<label for="username">Username: </label>
		<input type="text" name="username" /><br />
		<label for="password">Password: </label>
		<input type="password" name="password" /><br />
		<input type="submit" value="Submit" />
	</form>
</body>
</html>

class.php

<?php

class User {
protected $id;
protected $username;
protected $email;
protected $sql;

private $exists = FALSE;

public function __construct($username) {
	if (empty($username)) {
		throw new Exception('Username cannot be blank.');
	}

	$this->username = $username;
	$this->sql      = new PDO(DSN, DBUSER, DBPASS);
	$this->exists   = $this->validate();
}

private function createLoginToken($id) {
	$token   = $id . md5(microtime());
	$expires = new DateTime();

	$expires->add(new DateInterval('P30D'));

	$query = "INSERT INTO sessions (userID, token, expires)
		  VALUES (:id, :token, :expires)";
	$stmt  = $this->sql->prepare($query);

	$stmt->execute(array(':id'      => $id,
			     ':token'   => $token,
			     ':expires' => $expires->format('Y-m-d H:i:s')));

	setcookie('token', $token, $expires->getTimestamp(), '/');
}

private function hashPassword($password, $salt) {
	$string = PASSWORD_SALT . $password . md5($salt);
	$hashed = crypt($string, '$2a$12$' . substr(md5($salt), 0, 22));

	return $hashed;
}

private function validate() {
	$query = "SELECT COUNT(id)
		  FROM users
		  WHERE username = :username";
	$stmt  = $this->sql->prepare($query);

	$stmt->execute(array(':username' => $this->username));
	$count = $stmt->fetchColumn();

	return ($count > 0) ? TRUE : FALSE;
}

public function exists() {
	return $this->exists;
}

public function login($password, $remember = FALSE) {
	$query = "SELECT id, password, UNIX_TIMESTAMP(created) AS salt
		  FROM users
		  WHERE username = :username";
	$stmt  = $this->sql->prepare($query);

	$stmt->execute(array(':username' => $this->username));

	$row = $stmt->fetch(PDO::FETCH_OBJ);

	$hashed = $this->hashPassword($password, $row->salt);

	if ($row->password == $hashed) {
		if ($remember) {
			$this->createLoginToken($row->id);
		}
		return $row->id;
	}

	return FALSE;
}

public function random() {
	$random = mt_random(1000,9999);

	return $random;
}

public function registerUser($email) {
	if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
		throw new Exception('Email does not appear to be valid.');
	}
	$this->email = $email;

	$date   = new DateTime();
	$hashed = $this->hashPassword($pass->random(), $date->getTimestamp());

	$query = "INSERT INTO users (username, password, email, created)
		  VALUES (:username, :password, :email, :created)";
	$stmt  = $this->sql->prepare($query);

	$success = $stmt->execute(array(':username' => $this->username,
					':password' => $hashed,
					':email'    => $email,
					':created'  => $date->format('Y-m-d H:i:s')));

	return ($success === TRUE) ? $this->sql->lastInsertId() : FALSE;
}

public function verifyCookie($token) {
	$query = "SELECT userID
		  FROM sessions
		  WHERE token = :token
		  AND expires > NOW()";
	$stmt  = $this->sql->prepare($query);

	$stmt->execute(array(':token' => $token));

	return $stmt->fetchColumn();
}
}

?>

db.sql

CREATE TABLE IF NOT EXISTS `users` (
`id` int(11) DEFAULT NULL AUTO_INCREMENT,
`username` varchar(30) DEFAULT NULL,
`password` varchar(60) DEFAULT NULL,
`email` varchar(100) DEFAULT NULL UNIQUE,
`created` datetime DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB;

CREATE TABLE IF NOT EXISTS `sessions` (
`id` int(11) DEFAULT NULL AUTO_INCREMENT,
`userID` int(10) DEFAULT NULL,
`token` varchar(50) DEFAULT NULL,
`expires` datetime DEFAULT NULL,
KEY `userID` (`id`,`userID`,`token`,`expires`),
KEY `token` (`id`,`userID`,`token`,`expires`),
PRIMARY KEY (`id`)
) ENGINE=InnoDB;

trq · December 11, 2011

Why would you post code here without testing it? What exactly do you want help with?

Sign In

Login and Cookies

Recommended Posts

ibnclaudius

Link to comment

Share on other sites

trq

Link to comment

Share on other sites

Join the conversation

Browse

Activity

Important Information