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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                declare(strict_types=1);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /*  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * This file is part of the AppleApnPush package  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * (c) Vitaliy Zhuk <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * For the full copyright and license information, please view the LICENSE  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * file that was distributed with this source code  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace Apple\ApnPush\Protocol\Http\Authenticator;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Apple\ApnPush\Jwt\JwtInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Apple\ApnPush\Protocol\Http\Request;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Jose\Factory\JWKFactory;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Jose\Factory\JWSFactory;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Authenticate request via Json Web Token  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class JwtAuthenticator implements AuthenticatorInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private const ALGORITHM = 'ES256';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var JwtInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $jwt;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Constructor.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param JwtInterface $jwt  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function __construct(JwtInterface $jwt)  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $this->jwt = $jwt;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * {@inheritdoc} | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function authenticate(Request $request): Request  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $jws = $this->createJwsContent();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $request = $request->withHeader('authorization', sprintf('bearer %s', $jws)); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $request;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Create the content of JWS by Json Web Token  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private function createJwsContent(): string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $jwk = JWKFactory::createFromKeyFile($this->jwt->getPath(), '', [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'kid' => $this->jwt->getKey(),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'alg' => self::ALGORITHM,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'use' => 'sig',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        ]);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $payload = [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'iss' => $this->jwt->getTeamId(),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'iat' => time(),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $header = [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'alg' => self::ALGORITHM,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'kid' => $jwk->get('kid'), | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return JWSFactory::createJWSToCompactJSON(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $payload,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $jwk,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $header  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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