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<?php declare(strict_types = 1); |
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namespace jschreuder\Middle\Session; |
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use Dflydev\FigCookies\FigResponseCookies; |
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use Dflydev\FigCookies\SetCookie; |
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use Lcobucci\JWT\Builder; |
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use Lcobucci\JWT\Parser; |
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use Lcobucci\JWT\Signer; |
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use Lcobucci\JWT\Token; |
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use Lcobucci\JWT\ValidationData; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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/** |
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* A copy-paste from ocramius/psr7-session, but without needing to pull in |
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* Stratigility and working with our session container. |
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*/ |
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final class JwtToPsrMapper implements JwtToPsrMapperInterface |
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{ |
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/** @var Signer */ |
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private $signer; |
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/** @var string */ |
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private $signatureKey; |
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/** @var string */ |
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private $verificationKey; |
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/** @var int */ |
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private $expirationTime; |
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/** @var int */ |
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private $refreshTime; |
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/** @var Parser */ |
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private $tokenParser; |
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/** @var SetCookie */ |
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private $defaultCookie; |
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private function __construct( |
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Signer $signer, |
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string $signatureKey, |
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string $verificationKey, |
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SetCookie $defaultCookie, |
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Parser $tokenParser, |
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int $expirationTime, |
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int $refreshTime = 60 |
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) { |
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$this->signer = $signer; |
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$this->signatureKey = $signatureKey; |
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$this->verificationKey = $verificationKey; |
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$this->tokenParser = $tokenParser; |
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$this->defaultCookie = clone $defaultCookie; |
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$this->expirationTime = $expirationTime; |
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$this->refreshTime = $refreshTime; |
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} |
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public static function fromAsymmetricKeyDefaults( |
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string $privateRsaKey, |
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string $publicRsaKey, |
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int $expirationTime |
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) : JwtToPsrMapper { |
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return new self( |
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new Signer\Rsa\Sha256(), |
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$privateRsaKey, |
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$publicRsaKey, |
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SetCookie::create(self::DEFAULT_COOKIE) |
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->withSecure(true) |
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->withHttpOnly(true) |
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->withPath('/'), |
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new Parser(), |
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$expirationTime |
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); |
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} |
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/** @return ?Token */ |
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public function parseToken(ServerRequestInterface $request) |
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{ |
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$cookies = $request->getCookieParams(); |
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$cookieName = $this->defaultCookie->getName(); |
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if (!isset($cookies[$cookieName])) { |
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return null; |
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} |
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try { |
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$token = $this->tokenParser->parse($cookies[$cookieName]); |
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} catch (\InvalidArgumentException $invalidToken) { |
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return null; |
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} |
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if (!$token->validate(new ValidationData())) { |
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return null; |
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} |
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return $token; |
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} |
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public function appendToken( |
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SessionInterface $session, |
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ResponseInterface $response, |
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Token $token = null |
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) : ResponseInterface |
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{ |
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$sessionContainerChanged = $session->hasChanged(); |
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if ($sessionContainerChanged && $session->isEmpty()) { |
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return FigResponseCookies::set($response, $this->getExpirationCookie()); |
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} |
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if ($sessionContainerChanged || ($this->shouldTokenBeRefreshed($token) && ! $session->isEmpty())) { |
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return FigResponseCookies::set($response, $this->getTokenCookie($session)); |
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} |
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return $response; |
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} |
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public function extractSessionContainer(Token $token = null) : SessionInterface |
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{ |
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try { |
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if (is_null($token) || !$token->verify($this->signer, $this->verificationKey)) { |
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return new Session(); |
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} |
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// Re-encode the payload and decode as array to not get stdClass tree |
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return new Session( |
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json_decode(json_encode($token->getClaim(self::SESSION_CLAIM, [])), true) |
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); |
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} catch (\BadMethodCallException $invalidToken) { |
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return new Session(); |
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} |
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} |
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private function shouldTokenBeRefreshed(Token $token = null) : bool |
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{ |
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if (is_null($token)) { |
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return false; |
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} |
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if (!$token->hasClaim(self::ISSUED_AT_CLAIM)) { |
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return false; |
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} |
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return time() >= ($token->getClaim(self::ISSUED_AT_CLAIM) + $this->refreshTime); |
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} |
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private function getTokenCookie(SessionInterface $session) : SetCookie |
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{ |
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$timestamp = time(); |
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return $this |
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->defaultCookie |
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->withValue( |
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(new Builder()) |
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->setIssuedAt($timestamp) |
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->setExpiration($timestamp + $this->expirationTime) |
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->set(self::SESSION_CLAIM, $session->toArray()) |
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->sign($this->signer, $this->signatureKey) |
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->getToken() |
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) |
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->withExpires($timestamp + $this->expirationTime); |
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} |
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private function getExpirationCookie() : SetCookie |
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{ |
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$expirationDate = new \DateTime('-30 days'); |
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return $this |
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->defaultCookie |
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->withValue(null) |
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->withExpires($expirationDate->getTimestamp()); |
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} |
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} |
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jschreuder /
Middle
This check marks PHPDoc comments that could not be parsed by our parser. To see which comment annotations we can parse, please refer to our documentation on supported doc-types.