README

Steam OpenID Authentication Library

A simple, modern and modular OpenID client library implementation for Steam.

Why this library?

This library aims to make the proccess of OpenID authentication with Steam as painless as possible.

As you may know, there are already a couple of libraries that do more or less the exact same thing as this library:

• https://github.com/xPaw/SteamOpenID.php
• https://github.com/SmItH197/SteamAuthentication

But as you may know or will see, those libraries are exactly what people hate about PHP. They do not use any real coding or php-fig (psr) standards, are not modular (they require cURL) and are generally a pain to work with because they do not throw exceptions.

How To Use

<?php declare(strict_types=1);

use danielburger1337\SteamOpenId\SteamOpenID;

// RECOMMENDATION: register this in your psr-11 container.
$openId = new SteamOpenID(
    // REQUIRED: your OpenID "realm" (your host)
    'http://localhost:5000',
    // REQUIRED: your OpenID "return_to" URI (your callback URI)
    'http://localhost:5000/Callback.php',
    // OPTIONAL: your psr-18 implementation (defaults to symfony/http-client)
    new GuzzleHttp\Client(),
    // OPTIONAL: your psr-17 implementation (default to nyholm/psr7)
    new Nyholm\Psr7\Factory\Psr17Factory()
);

// start the authentication flow by redirecting the user to Steam.
header('Location: ' . $openId->constructCheckIdSetupUri());

// ... in Callback.php (or your callback controller method)

use danielburger1337\SteamOpenId\Exception\ExceptionInterface;

// When steam redirects the user back to your "return_to" URI,
// verify the provided parameters in the query string.

try {
    // This method returns the users 64-bit SteamID.
    $steamId = $openId->verifyCallback($_GET);
} catch (ExceptionInterface $e) {
    exit(var_dump('Failed to verify steam authentication :('));
}

Terms & Conditions

Before using this library, please read and accept Valve's terms and conditions here.