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<?php
namespace Illuminate\Auth;
use RuntimeException;
use Illuminate\Support\Str;
use Illuminate\Http\Response;
use Illuminate\Contracts\Events\Dispatcher;
use Illuminate\Contracts\Auth\UserProvider;
use Illuminate\Contracts\Auth\StatefulGuard;
use Symfony\Component\HttpFoundation\Request;
use Illuminate\Contracts\Auth\SupportsBasicAuth;
use Illuminate\Contracts\Cookie\QueueingFactory as CookieJar;
use Symfony\Component\HttpFoundation\Session\SessionInterface;
use Illuminate\Contracts\Auth\Authenticatable as AuthenticatableContract;
class SessionGuard implements StatefulGuard, SupportsBasicAuth
{
use GuardHelpers;
/**
* The name of the Guard. Typically "session".
*
* Corresponds to driver name in authentication configuration.
*
* @var string
*/
protected $name;
/**
* The user we last attempted to retrieve.
*
* @var \Illuminate\Contracts\Auth\Authenticatable
*/
protected $lastAttempted;
/**
* Indicates if the user was authenticated via a recaller cookie.
*
* @var bool
*/
protected $viaRemember = false;
/**
* The session used by the guard.
*
* @var \Symfony\Component\HttpFoundation\Session\SessionInterface
*/
protected $session;
/**
* The Illuminate cookie creator service.
*
* @var \Illuminate\Contracts\Cookie\QueueingFactory
*/
protected $cookie;
/**
* The request instance.
*
* @var \Symfony\Component\HttpFoundation\Request
*/
protected $request;
/**
* The event dispatcher instance.
*
* @var \Illuminate\Contracts\Events\Dispatcher
*/
protected $events;
/**
* Indicates if the logout method has been called.
*
* @var bool
*/
protected $loggedOut = false;
/**
* Indicates if a token user retrieval has been attempted.
*
* @var bool
*/
protected $tokenRetrievalAttempted = false;
/**
* Create a new authentication guard.
*
* @param string $name
* @param \Illuminate\Contracts\Auth\UserProvider $provider
* @param \Symfony\Component\HttpFoundation\Session\SessionInterface $session
* @param \Symfony\Component\HttpFoundation\Request $request
* @return void
*/
public function __construct($name,
UserProvider $provider,
SessionInterface $session,
Request $request = null)
{
$this->name = $name;
$this->session = $session;
$this->request = $request;
$this->provider = $provider;
}
/**
* Get the currently authenticated user.
*
* @return \Illuminate\Contracts\Auth\Authenticatable|null
*/
public function user()
{
if ($this->loggedOut) {
return;
}
// If we've already retrieved the user for the current request we can just
// return it back immediately. We do not want to fetch the user data on
// every call to this method because that would be tremendously slow.
if (! is_null($this->user)) {
return $this->user;
}
$id = $this->session->get($this->getName());
// First we will try to load the user using the identifier in the session if
// one exists. Otherwise we will check for a "remember me" cookie in this
// request, and if one exists, attempt to retrieve the user using that.
$user = null;
if (! is_null($id)) {
$user = $this->provider->retrieveById($id);
}
// If the user is null, but we decrypt a "recaller" cookie we can attempt to
// pull the user data on that cookie which serves as a remember cookie on
// the application. Once we have a user we can return it to the caller.
$recaller = $this->getRecaller();
if (is_null($user) && ! is_null($recaller)) {
$user = $this->getUserByRecaller($recaller);
if ($user) {
$this->updateSession($user->getAuthIdentifier());
$this->fireLoginEvent($user, true);
}
}
return $this->user = $user;
}
/**
* Get the ID for the currently authenticated user.
*
* @return int|null
*/
public function id()
{
if ($this->loggedOut) {
return;
}
$id = $this->session->get($this->getName());
if (is_null($id) && $this->user()) {
$id = $this->user()->getAuthIdentifier();
}
return $id;
}
/**
* Pull a user from the repository by its recaller ID.
*
* @param string $recaller
* @return mixed
*/
protected function getUserByRecaller($recaller)
{
if ($this->validRecaller($recaller) && ! $this->tokenRetrievalAttempted) {
$this->tokenRetrievalAttempted = true;
list($id, $token) = explode('|', $recaller, 2);
$this->viaRemember = ! is_null($user = $this->provider->retrieveByToken($id, $token));
return $user;
}
}
/**
* Get the decrypted recaller cookie for the request.
*
* @return string|null
*/
protected function getRecaller()
{
return $this->request->cookies->get($this->getRecallerName());
}
/**
* Get the user ID from the recaller cookie.
*
* @return string|null
*/
protected function getRecallerId()
{
if ($this->validRecaller($recaller = $this->getRecaller())) {
return head(explode('|', $recaller));
}
}
/**
* Determine if the recaller cookie is in a valid format.
*
* @param mixed $recaller
* @return bool
*/
protected function validRecaller($recaller)
{
if (! is_string($recaller) || ! Str::contains($recaller, '|')) {
return false;
}
$segments = explode('|', $recaller);
return count($segments) == 2 && trim($segments[0]) !== '' && trim($segments[1]) !== '';
}
/**
* Log a user into the application without sessions or cookies.
*
* @param array $credentials
* @return bool
*/
public function once(array $credentials = [])
{
if ($this->validate($credentials)) {
$this->setUser($this->lastAttempted);
return true;
}
return false;
}
/**
* Validate a user's credentials.
*
* @param array $credentials
* @return bool
*/
public function validate(array $credentials = [])
{
return $this->attempt($credentials, false, false);
}
/**
* Attempt to authenticate using HTTP Basic Auth.
*
* @param string $field
* @param array $extraConditions
* @return \Symfony\Component\HttpFoundation\Response|null
*/
public function basic($field = 'email', $extraConditions = [])
{
if ($this->check()) {
return;
}
// If a username is set on the HTTP basic request, we will return out without
// interrupting the request lifecycle. Otherwise, we'll need to generate a
// request indicating that the given credentials were invalid for login.
if ($this->attemptBasic($this->getRequest(), $field, $extraConditions)) {
return;
}
return $this->getBasicResponse();
}
/**
* Perform a stateless HTTP Basic login attempt.
*
* @param string $field
* @param array $extraConditions
* @return \Symfony\Component\HttpFoundation\Response|null
*/
public function onceBasic($field = 'email', $extraConditions = [])
{
$credentials = $this->getBasicCredentials($this->getRequest(), $field);
if (! $this->once(array_merge($credentials, $extraConditions))) {
return $this->getBasicResponse();
}
}
/**
* Attempt to authenticate using basic authentication.
*
* @param \Symfony\Component\HttpFoundation\Request $request
* @param string $field
* @param array $extraConditions
* @return bool
*/
protected function attemptBasic(Request $request, $field, $extraConditions = [])
{
if (! $request->getUser()) {
return false;
}
$credentials = $this->getBasicCredentials($request, $field);
return $this->attempt(array_merge($credentials, $extraConditions));
}
/**
* Get the credential array for a HTTP Basic request.
*
* @param \Symfony\Component\HttpFoundation\Request $request
* @param string $field
* @return array
*/
protected function getBasicCredentials(Request $request, $field)
{
return [$field => $request->getUser(), 'password' => $request->getPassword()];
}
/**
* Get the response for basic authentication.
*
* @return \Symfony\Component\HttpFoundation\Response
*/
protected function getBasicResponse()
{
$headers = ['WWW-Authenticate' => 'Basic'];
return new Response('Invalid credentials.', 401, $headers);
}
/**
* Attempt to authenticate a user using the given credentials.
*
* @param array $credentials
* @param bool $remember
* @param bool $login
* @return bool
*/
public function attempt(array $credentials = [], $remember = false, $login = true)
{
$this->fireAttemptEvent($credentials, $remember, $login);
$this->lastAttempted = $user = $this->provider->retrieveByCredentials($credentials);
// If an implementation of UserInterface was returned, we'll ask the provider
// to validate the user against the given credentials, and if they are in
// fact valid we'll log the users into the application and return true.
if ($this->hasValidCredentials($user, $credentials)) {
if ($login) {
$this->login($user, $remember);
}
return true;
}
// If the authentication attempt fails we will fire an event so that the user
// may be notified of any suspicious attempts to access their account from
// an unrecognized user. A developer may listen to this event as needed.
if ($login) {
$this->fireFailedEvent($user, $credentials);
}
return false;
}
/**
* Determine if the user matches the credentials.
*
* @param mixed $user
* @param array $credentials
* @return bool
*/
protected function hasValidCredentials($user, $credentials)
{
return ! is_null($user) && $this->provider->validateCredentials($user, $credentials);
}
/**
* Fire the attempt event with the arguments.
*
* @param array $credentials
* @param bool $remember
* @param bool $login
* @return void
*/
protected function fireAttemptEvent(array $credentials, $remember, $login)
{
if (isset($this->events)) {
$this->events->fire(new Events\Attempting(
$credentials, $remember, $login
));
}
}
/**
* Fire the failed authentication attempt event with the given arguments.
*
* @param \Illuminate\Contracts\Auth\Authenticatable|null $user
* @param array $credentials
* @return void
*/
protected function fireFailedEvent($user, array $credentials)
{
if (isset($this->events)) {
$this->events->fire(new Events\Failed($user, $credentials));
}
}
/**
* Register an authentication attempt event listener.
*
* @param mixed $callback
* @return void
*/
public function attempting($callback)
{
if (isset($this->events)) {
$this->events->listen(Events\Attempting::class, $callback);
}
}
/**
* Log a user into the application.
*
* @param \Illuminate\Contracts\Auth\Authenticatable $user
* @param bool $remember
* @return void
*/
public function login(AuthenticatableContract $user, $remember = false)
{
$this->updateSession($user->getAuthIdentifier());
// If the user should be permanently "remembered" by the application we will
// queue a permanent cookie that contains the encrypted copy of the user
// identifier. We will then decrypt this later to retrieve the users.
if ($remember) {
$this->createRememberTokenIfDoesntExist($user);
$this->queueRecallerCookie($user);
}
// If we have an event dispatcher instance set we will fire an event so that
// any listeners will hook into the authentication events and run actions
// based on the login and logout events fired from the guard instances.
$this->fireLoginEvent($user, $remember);
$this->setUser($user);
}
/**
* Fire the login event if the dispatcher is set.
*
* @param \Illuminate\Contracts\Auth\Authenticatable $user
* @param bool $remember
* @return void
*/
protected function fireLoginEvent($user, $remember = false)
{
if (isset($this->events)) {
$this->events->fire(new Events\Login($user, $remember));
}
}
/**
* Update the session with the given ID.
*
* @param string $id
* @return void
*/
protected function updateSession($id)
{
$this->session->set($this->getName(), $id);
$this->session->migrate(true);
}
/**
* Log the given user ID into the application.
*
* @param mixed $id
* @param bool $remember
* @return \Illuminate\Contracts\Auth\Authenticatable
*/
public function loginUsingId($id, $remember = false)
{
$user = $this->provider->retrieveById($id);
if (! is_null($user)) {
$this->login($user, $remember);
return $user;
}
return false;
}
/**
* Log the given user ID into the application without sessions or cookies.
*
* @param mixed $id
* @return bool
*/
public function onceUsingId($id)
{
$user = $this->provider->retrieveById($id);
if (! is_null($user)) {
$this->setUser($user);
return true;
}
return false;
}
/**
* Queue the recaller cookie into the cookie jar.
*
* @param \Illuminate\Contracts\Auth\Authenticatable $user
* @return void
*/
protected function queueRecallerCookie(AuthenticatableContract $user)
{
$value = $user->getAuthIdentifier().'|'.$user->getRememberToken();
$this->getCookieJar()->queue($this->createRecaller($value));
}
/**
* Create a "remember me" cookie for a given ID.
*
* @param string $value
* @return \Symfony\Component\HttpFoundation\Cookie
*/
protected function createRecaller($value)
{
return $this->getCookieJar()->forever($this->getRecallerName(), $value);
}
/**
* Log the user out of the application.
*
* @return void
*/
public function logout()
{
$user = $this->user();
// If we have an event dispatcher instance, we can fire off the logout event
// so any further processing can be done. This allows the developer to be
// listening for anytime a user signs out of this application manually.
$this->clearUserDataFromStorage();
if (! is_null($this->user)) {
$this->refreshRememberToken($user);
}
if (isset($this->events)) {
$this->events->fire(new Events\Logout($user));
}
// Once we have fired the logout event we will clear the users out of memory
// so they are no longer available as the user is no longer considered as
// being signed into this application and should not be available here.
$this->user = null;
$this->loggedOut = true;
}
/**
* Remove the user data from the session and cookies.
*
* @return void
*/
protected function clearUserDataFromStorage()
{
$this->session->remove($this->getName());
if (! is_null($this->getRecaller())) {
$recaller = $this->getRecallerName();
$this->getCookieJar()->queue($this->getCookieJar()->forget($recaller));
}
}
/**
* Refresh the "remember me" token for the user.
*
* @param \Illuminate\Contracts\Auth\Authenticatable $user
* @return void
*/
protected function refreshRememberToken(AuthenticatableContract $user)
{
$user->setRememberToken($token = Str::random(60));
$this->provider->updateRememberToken($user, $token);
}
/**
* Create a new "remember me" token for the user if one doesn't already exist.
*
* @param \Illuminate\Contracts\Auth\Authenticatable $user
* @return void
*/
protected function createRememberTokenIfDoesntExist(AuthenticatableContract $user)
{
if (empty($user->getRememberToken())) {
$this->refreshRememberToken($user);
}
}
/**
* Get the cookie creator instance used by the guard.
*
* @return \Illuminate\Contracts\Cookie\QueueingFactory
*
* @throws \RuntimeException
*/
public function getCookieJar()
{
if (! isset($this->cookie)) {
throw new RuntimeException('Cookie jar has not been set.');
}
return $this->cookie;
}
/**
* Set the cookie creator instance used by the guard.
*
* @param \Illuminate\Contracts\Cookie\QueueingFactory $cookie
* @return void
*/
public function setCookieJar(CookieJar $cookie)
{
$this->cookie = $cookie;
}
/**
* Get the event dispatcher instance.
*
* @return \Illuminate\Contracts\Events\Dispatcher
*/
public function getDispatcher()
{
return $this->events;
}
/**
* Set the event dispatcher instance.
*
* @param \Illuminate\Contracts\Events\Dispatcher $events
* @return void
*/
public function setDispatcher(Dispatcher $events)
{
$this->events = $events;
}
/**
* Get the session store used by the guard.
*
* @return \Illuminate\Session\Store
*/
public function getSession()
{
return $this->session;
}
/**
* Get the user provider used by the guard.
*
* @return \Illuminate\Contracts\Auth\UserProvider
*/
public function getProvider()
{
return $this->provider;
}
/**
* Set the user provider used by the guard.
*
* @param \Illuminate\Contracts\Auth\UserProvider $provider
* @return void
*/
public function setProvider(UserProvider $provider)
{
$this->provider = $provider;
}
/**
* Return the currently cached user.
*
* @return \Illuminate\Contracts\Auth\Authenticatable|null
*/
public function getUser()
{
return $this->user;
}
/**
* Set the current user.
*
* @param \Illuminate\Contracts\Auth\Authenticatable $user
* @return $this
*/
public function setUser(AuthenticatableContract $user)
{
$this->user = $user;
$this->loggedOut = false;
return $this;
}
/**
* Get the current request instance.
*
* @return \Symfony\Component\HttpFoundation\Request
*/
public function getRequest()
{
return $this->request ?: Request::createFromGlobals();
}
/**
* Set the current request instance.
*
* @param \Symfony\Component\HttpFoundation\Request $request
* @return $this
*/
public function setRequest(Request $request)
{
$this->request = $request;
return $this;
}
/**
* Get the last user we attempted to authenticate.
*
* @return \Illuminate\Contracts\Auth\Authenticatable
*/
public function getLastAttempted()
{
return $this->lastAttempted;
}
/**
* Get a unique identifier for the auth session value.
*
* @return string
*/
public function getName()
{
return 'login_'.$this->name.'_'.sha1(static::class);
}
/**
* Get the name of the cookie used to store the "recaller".
*
* @return string
*/
public function getRecallerName()
{
return 'remember_'.$this->name.'_'.sha1(static::class);
}
/**
* Determine if the user was authenticated via "remember me" cookie.
*
* @return bool
*/
public function viaRemember()
{
return $this->viaRemember;
}
}