Question

In: Computer Science

Using the zip file provided, create a secure login/registration app. Make sure that your game pages...

Using the zip file provided, create a secure login/registration app. Make sure that your game pages (at least two) are unavailable to unregistered users. Upload a zip file with your working PHP application.

Contents of zip

Index.php

-----------------

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
    </head>
    <body>
        <?php
        // 1. display error message in the session (if any): $_SESSION['error']
        // 2. display either the user's name and the game menu or the form/link below
        // (display the menu by using a php include of menu.html)
        ?>
        <form action="authenticate.php" method="post">
            Username: <input type="text" name="user"><br>
            Password: <input type="password" name="pwd"><br>
            <input type="submit">
        </form>
        <a href="register.php">Register a new login</a>
    </body>
</html>

menu.html

---------------

   <h3>Game Menu</h3>
        <ul>
            <li><a href="guess.php">Guess</a></li>
        </ul>

newUser.php

-------------------

<?php
session_start();

// 1. validate the input
// 2. make sure user is not already in the database
// 3. make sure that pwd and repeat match
// 4. insert a new row (be sure to hash the pwd first)

// 5. redirect to home page
header("Location: index.php");
?>

-------------

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
    </head>
    <body>
        <form action="newUser.php" method="post">
            Username: <input type="text" name="user"><br>
            Password: <input type="password" name="pwd"><br>
            Repeat: <input type="password" name="repeat"><br>
            <input type="submit">
        </form>
    </body>
</html>

games_ddl.sql

----------------

CREATE DATABASE games;

USE games;
CREATE TABLE users
(
    id int primary key auto_increment,
    username varchar(255),
    password varchar(255)
);

-- insert a row into the users table for the administrator:
-- username = foo
-- password = bar
INSERT INTO users (username, password) VALUES ('foo', '$2y$10$IWDcVmWIHlx5nI5A.18gNOUDoJZgdfWJwFMamea9JaUK9M.iTx8g.');

Authenticate.php

---------------------

<?php

// 1. validate the form input (set $_SESSION['error'] if there is a problem)
// 2. create a database connection (using the standard root user)
// 3. select the password from the users table where the username came from the form
// 4. use password_verify to see if the form password matches the hashed password from db: password_verify($pwdFromFrom, $dbPwd) returns a boolean
// 5. forward user to index.php
// 6. allow execution to continue and close db connection

Solutions

Expert Solution

There are a few steps we need to take before we create our secure login system, we need to set up our web server environment and make sure we have the required extensions enabled.

If you haven't got a local web server setup I recommend you download and install XAMPP.
XAMPP is a web server package that will run on many operating systems, it includes PHP, MySQL, Apache, phpMyAdmin, and more, no need to install the software separately.

index.html

<!DOCTYPE html>
<html>
   <head>
       <meta charset="utf-8">
       <title>Login</title>
       <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.1/css/all.css">

style.css

* {
   box-sizing: border-box;
   font-family: -apple-system, BlinkMacSystemFont, "segoe ui", roboto, oxygen, ubuntu, cantarell, "fira sans", "droid sans", "helvetica neue", Arial, sans-serif;
   font-size: 16px;
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
}
body {
   background-color: #435165;
}
.login {
   width: 400px;
   background-color: #ffffff;
   box-shadow: 0 0 9px 0 rgba(0, 0, 0, 0.3);
   margin: 100px auto;
}
.login h1 {
   text-align: center;
   color: #5b6574;
   font-size: 24px;
   padding: 20px 0 20px 0;
   border-bottom: 1px solid #dee0e4;
}
.login form {
   display: flex;
   flex-wrap: wrap;
   justify-content: center;
   padding-top: 20px;
}
.login form label {
   display: flex;
   justify-content: center;
   align-items: center;
   width: 50px;
   height: 50px;
   background-color: #3274d6;
   color: #ffffff;
}
.login form input[type="password"], .login form input[type="text"] {
   width: 310px;
   height: 50px;
   border: 1px solid #dee0e4;
   margin-bottom: 20px;
   padding: 0 15px;
}
.login form input[type="submit"] {
   width: 100%;
   padding: 15px;
    margin-top: 20px;
   background-color: #3274d6;
   border: 0;
   cursor: pointer;
   font-weight: bold;
   color: #ffffff;
   transition: background-color 0.2s;
}
.login form input[type="submit"]:hover {
   background-color: #2868c7;
   transition: background-color 0.2s;
}

phplogin

CREATE TABLE IF NOT EXISTS `accounts` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `username` varchar(50) NOT NULL,
   `password` varchar(255) NOT NULL,
   `email` varchar(100) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;

INSERT INTO `accounts` (`id`, `username`, `password`, `email`) VALUES (1, 'test', '$2y$10$SfhYIDtn.iOuCW7zfoFLuuZHX6lja4lF4XA4JqNmpiH/.P3zB8JCa', '[email protected]');

authenticate.php

<?php
session_start();
// Change this to your connection info.
$DATABASE_HOST = 'localhost';
$DATABASE_USER = 'root';
$DATABASE_PASS = '';
$DATABASE_NAME = 'phplogin';
// Try and connect using the info above.
$con = mysqli_connect($DATABASE_HOST, $DATABASE_USER, $DATABASE_PASS, $DATABASE_NAME);
if ( mysqli_connect_errno() ) {
// If there is an error with the connection, stop the script and display the error.
exit('Failed to connect to MySQL: ' . mysqli_connect_error());
}

// Now we check if the data from the login form was submitted, isset() will check if the data exists.
if ( !isset($_POST['username'], $_POST['password']) ) {
// Could not get the data that should have been sent.
exit('Please fill both the username and password fields!');
}

// Prepare our SQL, preparing the SQL statement will prevent SQL injection.
if ($stmt = $con->prepare('SELECT id, password FROM accounts WHERE username = ?')) {
   // Bind parameters (s = string, i = int, b = blob, etc), in our case the username is a string so we use "s"
   $stmt->bind_param('s', $_POST['username']);
   $stmt->execute();
   // Store the result so we can check if the account exists in the database.
   $stmt->store_result();

$stmt->close();
}
?>

venereology answered 1 year ago

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