BookStack/app/Auth/Access/SocialAuthService.php
2021-08-21 14:49:40 +00:00

318 lines
10 KiB
PHP

<?php
namespace BookStack\Auth\Access;
use BookStack\Auth\SocialAccount;
use BookStack\Auth\User;
use BookStack\Exceptions\SocialDriverNotConfigured;
use BookStack\Exceptions\SocialSignInAccountNotUsed;
use BookStack\Exceptions\UserRegistrationException;
use Illuminate\Support\Facades\Event;
use Illuminate\Support\Str;
use Laravel\Socialite\Contracts\Factory as Socialite;
use Laravel\Socialite\Contracts\Provider;
use Laravel\Socialite\Contracts\User as SocialUser;
use SocialiteProviders\Manager\SocialiteWasCalled;
use Symfony\Component\HttpFoundation\RedirectResponse;
class SocialAuthService
{
/**
* The core socialite library used.
*
* @var Socialite
*/
protected $socialite;
/**
* @var LoginService
*/
protected $loginService;
/**
* The default built-in social drivers we support.
*
* @var string[]
*/
protected $validSocialDrivers = [
'google',
'github',
'facebook',
'slack',
'twitter',
'azure',
'okta',
'gitlab',
'twitch',
'discord',
];
/**
* Callbacks to run when configuring a social driver
* for an initial redirect action.
* Array is keyed by social driver name.
* Callbacks are passed an instance of the driver.
*
* @var array<string, callable>
*/
protected $configureForRedirectCallbacks = [];
/**
* SocialAuthService constructor.
*/
public function __construct(Socialite $socialite, LoginService $loginService)
{
$this->socialite = $socialite;
$this->loginService = $loginService;
}
/**
* Start the social login path.
*
* @throws SocialDriverNotConfigured
*/
public function startLogIn(string $socialDriver): RedirectResponse
{
$driver = $this->validateDriver($socialDriver);
return $this->getDriverForRedirect($driver)->redirect();
}
/**
* Start the social registration process.
*
* @throws SocialDriverNotConfigured
*/
public function startRegister(string $socialDriver): RedirectResponse
{
$driver = $this->validateDriver($socialDriver);
return $this->getDriverForRedirect($driver)->redirect();
}
/**
* Handle the social registration process on callback.
*
* @throws UserRegistrationException
*/
public function handleRegistrationCallback(string $socialDriver, SocialUser $socialUser): SocialUser
{
// Check social account has not already been used
if (SocialAccount::query()->where('driver_id', '=', $socialUser->getId())->exists()) {
throw new UserRegistrationException(trans('errors.social_account_in_use', ['socialAccount' => $socialDriver]), '/login');
}
if (User::query()->where('email', '=', $socialUser->getEmail())->exists()) {
$email = $socialUser->getEmail();
throw new UserRegistrationException(trans('errors.error_user_exists_different_creds', ['email' => $email]), '/login');
}
return $socialUser;
}
/**
* Get the social user details via the social driver.
*
* @throws SocialDriverNotConfigured
*/
public function getSocialUser(string $socialDriver): SocialUser
{
$driver = $this->validateDriver($socialDriver);
return $this->socialite->driver($driver)->user();
}
/**
* Handle the login process on a oAuth callback.
*
* @throws SocialSignInAccountNotUsed
*/
public function handleLoginCallback(string $socialDriver, SocialUser $socialUser)
{
$socialId = $socialUser->getId();
// Get any attached social accounts or users
$socialAccount = SocialAccount::query()->where('driver_id', '=', $socialId)->first();
$isLoggedIn = auth()->check();
$currentUser = user();
$titleCaseDriver = Str::title($socialDriver);
// When a user is not logged in and a matching SocialAccount exists,
// Simply log the user into the application.
if (!$isLoggedIn && $socialAccount !== null) {
$this->loginService->login($socialAccount->user, $socialAccount);
return redirect()->intended('/');
}
// When a user is logged in but the social account does not exist,
// Create the social account and attach it to the user & redirect to the profile page.
if ($isLoggedIn && $socialAccount === null) {
$account = $this->newSocialAccount($socialDriver, $socialUser);
$currentUser->socialAccounts()->save($account);
session()->flash('success', trans('settings.users_social_connected', ['socialAccount' => $titleCaseDriver]));
return redirect($currentUser->getEditUrl());
}
// When a user is logged in and the social account exists and is already linked to the current user.
if ($isLoggedIn && $socialAccount !== null && $socialAccount->user->id === $currentUser->id) {
session()->flash('error', trans('errors.social_account_existing', ['socialAccount' => $titleCaseDriver]));
return redirect($currentUser->getEditUrl());
}
// When a user is logged in, A social account exists but the users do not match.
if ($isLoggedIn && $socialAccount !== null && $socialAccount->user->id != $currentUser->id) {
session()->flash('error', trans('errors.social_account_already_used_existing', ['socialAccount' => $titleCaseDriver]));
return redirect($currentUser->getEditUrl());
}
// Otherwise let the user know this social account is not used by anyone.
$message = trans('errors.social_account_not_used', ['socialAccount' => $titleCaseDriver]);
if (setting('registration-enabled') && config('auth.method') !== 'ldap' && config('auth.method') !== 'saml2') {
$message .= trans('errors.social_account_register_instructions', ['socialAccount' => $titleCaseDriver]);
}
throw new SocialSignInAccountNotUsed($message, '/login');
}
/**
* Ensure the social driver is correct and supported.
*
* @throws SocialDriverNotConfigured
*/
protected function validateDriver(string $socialDriver): string
{
$driver = trim(strtolower($socialDriver));
if (!in_array($driver, $this->validSocialDrivers)) {
abort(404, trans('errors.social_driver_not_found'));
}
if (!$this->checkDriverConfigured($driver)) {
throw new SocialDriverNotConfigured(trans('errors.social_driver_not_configured', ['socialAccount' => Str::title($socialDriver)]));
}
return $driver;
}
/**
* Check a social driver has been configured correctly.
*/
protected function checkDriverConfigured(string $driver): bool
{
$lowerName = strtolower($driver);
$configPrefix = 'services.' . $lowerName . '.';
$config = [config($configPrefix . 'client_id'), config($configPrefix . 'client_secret'), config('services.callback_url')];
return !in_array(false, $config) && !in_array(null, $config);
}
/**
* Gets the names of the active social drivers.
*/
public function getActiveDrivers(): array
{
$activeDrivers = [];
foreach ($this->validSocialDrivers as $driverKey) {
if ($this->checkDriverConfigured($driverKey)) {
$activeDrivers[$driverKey] = $this->getDriverName($driverKey);
}
}
return $activeDrivers;
}
/**
* Get the presentational name for a driver.
*/
public function getDriverName(string $driver): string
{
return config('services.' . strtolower($driver) . '.name');
}
/**
* Check if the current config for the given driver allows auto-registration.
*/
public function driverAutoRegisterEnabled(string $driver): bool
{
return config('services.' . strtolower($driver) . '.auto_register') === true;
}
/**
* Check if the current config for the given driver allow email address auto-confirmation.
*/
public function driverAutoConfirmEmailEnabled(string $driver): bool
{
return config('services.' . strtolower($driver) . '.auto_confirm') === true;
}
/**
* Fill and return a SocialAccount from the given driver name and SocialUser.
*/
public function newSocialAccount(string $socialDriver, SocialUser $socialUser): SocialAccount
{
return new SocialAccount([
'driver' => $socialDriver,
'driver_id' => $socialUser->getId(),
'avatar' => $socialUser->getAvatar(),
]);
}
/**
* Detach a social account from a user.
*/
public function detachSocialAccount(string $socialDriver): void
{
user()->socialAccounts()->where('driver', '=', $socialDriver)->delete();
}
/**
* Provide redirect options per service for the Laravel Socialite driver.
*/
protected function getDriverForRedirect(string $driverName): Provider
{
$driver = $this->socialite->driver($driverName);
if ($driverName === 'google' && config('services.google.select_account')) {
$driver->with(['prompt' => 'select_account']);
}
if ($driverName === 'azure') {
$driver->with(['resource' => 'https://graph.windows.net']);
}
if (isset($this->configureForRedirectCallbacks[$driverName])) {
$this->configureForRedirectCallbacks[$driverName]($driver);
}
return $driver;
}
/**
* Add a custom socialite driver to be used.
* Driver name should be lower_snake_case.
* Config array should mirror the structure of a service
* within the `Config/services.php` file.
* Handler should be a Class@method handler to the SocialiteWasCalled event.
*/
public function addSocialDriver(
string $driverName,
array $config,
string $socialiteHandler,
callable $configureForRedirect = null
) {
$this->validSocialDrivers[] = $driverName;
config()->set('services.' . $driverName, $config);
config()->set('services.' . $driverName . '.redirect', url('/login/service/' . $driverName . '/callback'));
config()->set('services.' . $driverName . '.name', $config['name'] ?? $driverName);
Event::listen(SocialiteWasCalled::class, $socialiteHandler);
if (!is_null($configureForRedirect)) {
$this->configureForRedirectCallbacks[$driverName] = $configureForRedirect;
}
}
}