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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\Adapters\Lcobucci; |
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use Lcobucci\JWT\ValidationData; |
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use Lcobucci\JWT\Builder; |
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use Lcobucci\JWT\Signer\Hmac\Sha256; |
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use Lcobucci\JWT\Parser; |
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use Canis\Lumen\Jwt\Token; |
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use Canis\Lumen\Jwt\Contracts\Generator as GeneratorContract; |
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class Generator |
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extends HelperBase |
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implements GeneratorContract |
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{ |
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/** |
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* Generates the token |
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* @param array $claims |
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* @return string |
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*/ |
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final public function __invoke(array $claims) |
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{ |
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$signer = new Sha256(); |
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$builder = new Builder(); |
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$claims = array_merge($this->getDefaultClaims(), $claims, $this->getForcedClaims()); |
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if (!$this->checkRequiredClaims(array_keys($claims))) { |
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return false; |
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}; |
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foreach ($claims as $claim => $value) { |
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if ($this->isBadClaim($claim)) { |
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continue; |
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} |
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$builder->set($claim, $value); |
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} |
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$jti = substr(hash('sha256', serialize($claims) . openssl_random_pseudo_bytes(20)), 0, 16); |
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$builder->setId($jti, $this->config['jtiInHeader']); |
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$builder->sign($signer, $this->config['secret']); |
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$token = $builder->getToken(); |
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$generatedClaims = $token->getClaims(); |
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foreach ($generatedClaims as $key => $value) { |
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$generatedClaims[$key] = $value->getValue(); |
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} |
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return new Token((string) $token, $generatedClaims); |
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} |
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/** |
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* Default claims (can be overriden) |
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* |
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* @return array |
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*/ |
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protected function getDefaultClaims() |
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{ |
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$default = []; |
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$default['nbf'] = time() + $this->config['nbfOffset']; |
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$default['exp'] = time() + $this->config['expOffset']; |
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if (!empty($this->config['issuer'])) { |
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$default['iss'] = $this->config['issuer']; |
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} |
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if (!empty($this->config['audience'])) { |
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$default['aud'] = $this->config['audience']; |
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} |
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return $default; |
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} |
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/** |
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* Forced claims |
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* |
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* @return array |
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*/ |
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private function getForcedClaims() |
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{ |
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return [ |
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'iat' => time() |
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]; |
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} |
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/** |
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* Checks if claim is bad |
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* |
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* @param string $claim |
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* @return boolean |
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*/ |
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private function isBadClaim($claim) |
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{ |
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return in_array($claim, ['jti']); |
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} |
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} |
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Let’s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let’s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: