PHP에서 API 인증을 위해 JWT 및 JWS를 사용하는 방법

composer require firebase/php-jwt
composer require lcobucci/jwt

use FirebaseJWTJWT;

// Set up the JWT payload data
$payload = array(
    "sub" => "1234567890",
    "name" => "John Doe",
    "iat" => 1516239022
);

// Set up the JWT secret key
$secret_key = "YOUR_SECRET_KEY";

// Generate the JWT
$jwt = JWT::encode($payload, $secret_key);

use FirebaseJWTJWT;

// Set up the JWT secret key
$secret_key = "YOUR_SECRET_KEY";

// Get the JWT from the request headers
$jwt = getAuthorizationHeader();

// Verify the JWT
try {
    $payload = JWT::decode($jwt, $secret_key, array('HS256'));
} catch (Exception $e) {
    // If the JWT is invalid, return an error response
    return json_encode(array(
        'success' => false,
        'message' => 'Invalid JWT'
    ));
}

// If the JWT is valid, return a success response with the payload data
return json_encode(array(
    'success' => true,
    'message' => 'Valid JWT',
    'payload' => $payload
));

// Function to get the Authorization header from the request
function getAuthorizationHeader()
{
    $headers = apache_request_headers();

    if (isset($headers['Authorization'])) {
        return $headers['Authorization'];
    } else {
        return null;
    }
}

use LcobucciJWTBuilder;
use LcobucciJWTSignerHmacSha256;

// Set up the JWT signer
$signer = new Sha256();

// Set up the JWT builder
$builder = new Builder();
$builder->setIssuer('http://example.com');
$builder->setAudience('http://example.org');
$builder->setId('4f1g23a12aa', true);
$builder->setIssuedAt(time());
$builder->setExpiration(time() + 3600);
$builder->set('uid', 1);

// Sign the JWT
$token = $builder->sign($signer, 'YOUR_SECRET_KEY')->getToken();

// Get the token string
$jwt = (string) $token;

use LcobucciJWTValidationData;

// Set up the JWT secret key
$secret_key = "YOUR_SECRET_KEY";

// Get the JWT from the request headers
$jwt = getAuthorizationHeader();

// Verify the JWS
$token = $signer->loadToken($jwt);
$validationData = new ValidationData();
$validationData->setIssuer('http://example.com');
$validationData->setAudience('http://example.org');
$validationData->setId('4f1g23a12aa');
$validationData->setCurrentTime(time());

if (!$token->validate($validationData) || !$token->verify($signer, $secret_key)) {
    // If the JWS is invalid, return an error response
    return json_encode(array(
        'success' => false,
        'message' => 'Invalid JWS'
    ));
}

// If the JWS is valid, return a success response with the payload data
$payload = $token->getClaims();
return json_encode(array(
    'success' => true,
    'message' => 'Valid JWS',
    'payload' => $payload
));