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<?php /* * This file is part of jwt-auth. * * (c) Sean Tymon <tymon148@gmail.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Tymon\JWTAuth; use Tymon\JWTAuth\Contracts\Providers\Storage; use Tymon\JWTAuth\Support\Utils; class Blacklist { /** * The storage. * * @var \Tymon\JWTAuth\Contracts\Providers\Storage */ protected $storage; /** * The grace period when a token is blacklisted. In seconds. * * @var int */ protected $gracePeriod = 0; /** * Number of minutes from issue date in which a JWT can be refreshed. * * @var int */ protected $refreshTTL = 20160; /** * The unique key held within the blacklist. * * @var string */ protected $key = 'jti'; /** * Constructor. * * @param \Tymon\JWTAuth\Contracts\Providers\Storage $storage * * @return void */ public function __construct(Storage $storage) { $this->storage = $storage; } /** * Add the token (jti claim) to the blacklist. * * @param \Tymon\JWTAuth\Payload $payload * * @return bool */ public function add(Payload $payload) { // if there is no exp claim then add the jwt to // the blacklist indefinitely if (! $payload->hasKey('exp')) { return $this->addForever($payload); } // if we have already added this token to the blacklist if (! empty($this->storage->get($this->getKey($payload)))) { return true; } $this->storage->add( $this->getKey($payload), ['valid_until' => $this->getGraceTimestamp()], $this->getMinutesUntilExpired($payload) ); return true; } /** * Get the number of minutes until the token expiry. * * @param \Tymon\JWTAuth\Payload $payload * * @return int */ protected function getMinutesUntilExpired(Payload $payload) { $exp = Utils::timestamp($payload['exp']); $iat = Utils::timestamp($payload['iat']); // get the latter of the two expiration dates and find // the number of minutes until the expiration date, // plus 1 minute to avoid overlap return $exp->max($iat->addMinutes($this->refreshTTL))->addMinute()->diffInRealMinutes(); } /** * Add the token (jti claim) to the blacklist indefinitely. * * @param \Tymon\JWTAuth\Payload $payload * * @return bool */ public function addForever(Payload $payload) { $this->storage->forever($this->getKey($payload), 'forever'); return true; } /** * Determine whether the token has been blacklisted. * * @param \Tymon\JWTAuth\Payload $payload * * @return bool */ public function has(Payload $payload) { $val = $this->storage->get($this->getKey($payload)); // exit early if the token was blacklisted forever, if ($val === 'forever') { return true; } // check whether the expiry + grace has past return ! empty($val) && ! Utils::isFuture($val['valid_until']); } /** * Remove the token (jti claim) from the blacklist. * * @param \Tymon\JWTAuth\Payload $payload * * @return bool */ public function remove(Payload $payload) { return $this->storage->destroy($this->getKey($payload)); } /** * Remove all tokens from the blacklist. * * @return bool */ public function clear() { $this->storage->flush(); return true; } /** * Get the timestamp when the blacklist comes into effect * This defaults to immediate (0 seconds). * * @return int */ protected function getGraceTimestamp() { return Utils::now()->addSeconds($this->gracePeriod)->getTimestamp(); } /** * Set the grace period. * * @param int $gracePeriod * * @return $this */ public function setGracePeriod($gracePeriod) { $this->gracePeriod = (int) $gracePeriod; return $this; } /** * Get the grace period. * * @return int */ public function getGracePeriod() { return $this->gracePeriod; } /** * Get the unique key held within the blacklist. * * @param \Tymon\JWTAuth\Payload $payload * * @return mixed */ public function getKey(Payload $payload) { return $payload($this->key); } /** * Set the unique key held within the blacklist. * * @param string $key * * @return $this */ public function setKey($key) { $this->key = value($key); return $this; } /** * Set the refresh time limit. * * @param int $ttl * * @return $this */ public function setRefreshTTL($ttl) { $this->refreshTTL = (int) $ttl; return $this; } /** * Get the refresh time limit. * * @return int */ public function getRefreshTTL() { return $this->refreshTTL; } }