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<?php |
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/** |
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* @copyright Copyright (c) 2016 Canis.io |
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* @license MIT |
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*/ |
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namespace Canis\Lumen\Jwt; |
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use Illuminate\Http\Request; |
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use Illuminate\Auth\GuardHelpers; |
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use Illuminate\Contracts\Auth\UserProvider; |
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use Illuminate\Contracts\Auth\Guard as GaurdContract; |
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use Illuminate\Contracts\Auth\Authenticatable; |
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use Canis\Lumen\Jwt\Exceptions\InvalidTokenException; |
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use Canis\Lumen\Jwt\Exceptions\InvalidAdapterException; |
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use Canis\Lumen\Jwt\Contracts\AdapterFactory as AdapterFactoryContract; |
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use Canis\Lumen\Jwt\Contracts\Processor as ProcessorContract; |
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use Canis\Lumen\Jwt\Contracts\Subject as SubjectContract; |
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abstract class BaseGuard |
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implements GaurdContract |
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{ |
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use GuardHelpers; |
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const JWT_GUARD_CLAIM = 'grd'; |
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/** |
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* @var string |
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*/ |
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protected $id; |
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/** |
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* @var Request |
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*/ |
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protected $request; |
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/** |
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* @var array |
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*/ |
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protected $config; |
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/** |
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* @var array |
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*/ |
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private $factoryCache = []; |
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/** |
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* Constructor |
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* |
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* @param UserProvider $provider |
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* @param Request $request |
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*/ |
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public function __construct($id, UserProvider $provider, Request $request, array $config = []) |
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{ |
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$this->request = $request; |
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$this->provider = $provider; |
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$this->config = $config; |
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$this->id = $id; |
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} |
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/** |
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* Returns the adapter class name to use |
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* |
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* @return string |
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*/ |
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public function getAdapterFactoryClass() |
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{ |
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$config = config('jwt'); |
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if (!isset($config['adapter'])) { |
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$config['adapter'] = 'lcobucci'; |
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} |
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if (class_exists($config['adapter'])) { |
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$factoryClass = $config['adapter']; |
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} else { |
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$factoryClass = 'Canis\Lumen\Jwt\Adapters\\' . ucfirst($config['adapter']) . '\Factory'; |
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if (!class_exists($factoryClass)) { |
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throw new InvalidAdapterException("{$config['adapter']} is not available"); |
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} |
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} |
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return $factoryClass; |
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} |
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/** |
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* Returns the adapter factory object |
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* |
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* @return AdapterFactoryContract |
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*/ |
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protected function getAdapterFactory() |
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{ |
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if (!isset($this->factoryCache[$this->id])) { |
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$config = config('jwt'); |
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if (isset($this->config['adapter'])) { |
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$config = array_merge($config, $this->config['adapter']); |
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} |
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$factoryClass = $this->getAdapterFactoryClass(); |
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$this->factoryCache[$this->id] = new $factoryClass($config); |
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} |
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return $this->factoryCache[$this->id]; |
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} |
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/** |
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* Returns a token processor from the adapter factory |
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* |
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* @return ProcessorContract |
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*/ |
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protected function getProcessor() |
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{ |
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return $this->getAdapterFactory()->getProcessor(); |
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} |
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/** |
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* Returns a token generator from the adapter factory |
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* |
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* @return GeneratorContract |
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*/ |
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protected function getGenerator() |
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{ |
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return $this->getAdapterFactory()->getGenerator(); |
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} |
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/** |
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* Gets the provider |
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* |
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* @return UserProvider |
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*/ |
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public function getProvider() |
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{ |
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return $this->provider; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function user() |
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{ |
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if (!is_null($this->user)) { |
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return $this->user; |
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} |
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$user = null; |
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$token = $this->getBearerToken(); |
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if ($token !== false) { |
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$user = $this->getProvider()->retrieveById($token->getClaim('sub')); |
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$claimValidation = [static::JWT_GUARD_CLAIM => $this->id]; |
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if (!($user instanceof SubjectContract) |
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|| !$token->ensureClaimValues(array_merge($user->getJWTClaimValidation(), $claimValidation))) { |
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$user = null; |
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} |
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} |
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return $this->user = $user; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getBearerToken($isRefresh = false) |
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{ |
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$token = $this->request->bearerToken(); |
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if (empty($token)) { |
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return false; |
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} |
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$processor = $this->getProcessor(); |
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return $processor($token, $isRefresh); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function validate(array $credentials = []) |
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{ |
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$user = $this->getProvider()->retrieveByCredentials($credentials); |
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if ($user instanceof Authenticatable && $this->hasValidCredentials($user, $credentials)) { |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Determine if the user matches the credentials. |
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* |
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* @param Authenticatable|null $user |
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* @param array $credentials |
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* @return bool |
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*/ |
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protected function hasValidCredentials($user, $credentials) |
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{ |
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return !is_null($user) && $this->getProvider()->validateCredentials($user, $credentials); |
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} |
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/** |
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* Sets the Request |
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* |
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* @param Request $request |
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*/ |
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public function setRequest(Request $request) |
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{ |
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$this->request = $request; |
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} |
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/** |
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* Gets the request |
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* |
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* @return Request |
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*/ |
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public function getRequest() |
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{ |
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return $this->request; |
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} |
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/** |
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* Attempt to authenticate a user using the given credentials. |
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* |
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* @param array $credentials |
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* @param boolean $login |
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* @return bool|Token |
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*/ |
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public function attempt(array $credentials = [], $login = true) |
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{ |
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$user = $this->getProvider()->retrieveByCredentials($credentials); |
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if ($user instanceof Authenticatable && $this->hasValidCredentials($user, $credentials)) { |
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if ($login === true) { |
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$this->login($user); |
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} |
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if (!($user instanceof SubjectContract)) { |
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throw new InvalidTokenException("Unable to generate token"); |
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} |
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return $this->generateToken($user); |
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} |
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return false; |
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} |
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/** |
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* Log a user into the application. |
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* |
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* @param \Illuminate\Contracts\Auth\Authenticatable $user |
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*/ |
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public function login(Authenticatable $user) |
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{ |
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$this->setUser($user); |
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return true; |
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} |
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/** |
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* Clear user |
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* @return boolean |
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*/ |
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public function logout() |
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{ |
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$this->user = null; |
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return true; |
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} |
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/** |
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* Generate a new token |
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* |
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* @param SubjectContract $user |
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* @return Token |
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*/ |
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protected function generateToken(SubjectContract $user) |
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{ |
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$tokenGenerator = $this->getGenerator(); |
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$claims = $user->getJWTClaims(); |
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$claims['sub'] = $user->getJWTSubject(); |
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$claims[static::JWT_GUARD_CLAIM] = $this->id; |
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if (!($token = $tokenGenerator($claims))) { |
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throw new InvalidTokenException("Unable to generate token"); |
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} |
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return $token; |
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} |
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} |
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