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 [](https://packagist.org/packages/firebase/php-jwt) [](https://packagist.org/packages/firebase/php-jwt) [](https://packagist.org/packages/firebase/php-jwt) PHP-JWT ======= A simple library to encode and decode JSON Web Tokens (JWT) in PHP, conforming to [RFC 7519](https://tools.ietf.org/html/rfc7519). Installation ------------ Use composer to manage your dependencies and download PHP-JWT: ```bash composer require firebase/php-jwt ``` Optionally, install the `paragonie/sodium_compat` package from composer if your php is < 7.2 or does not have libsodium installed: ```bash composer require paragonie/sodium_compat ``` Example ------- ```php use Firebase\JWT\JWT; use Firebase\JWT\Key; $key = 'example_key'; $payload = [ 'iss' => 'http://example.org', 'aud' => 'http://example.com', 'iat' => 1356999524, 'nbf' => 1357000000 ]; /** * IMPORTANT: * You must specify supported algorithms for your application. See * https://tools.ietf.org/html/draft-ietf-jose-json-web-algorithms-40 * for a list of spec-compliant algorithms. */ $jwt = JWT::encode($payload, $key, 'HS256'); $decoded = JWT::decode($jwt, new Key($key, 'HS256')); print_r($decoded); /* NOTE: This will now be an object instead of an associative array. To get an associative array, you will need to cast it as such: */ $decoded_array = (array) $decoded; /** * You can add a leeway to account for when there is a clock skew times between * the signing and verifying servers. It is recommended that this leeway should * not be bigger than a few minutes. * * Source: http://self-issued.info/docs/draft-ietf-oauth-json-web-token.html#nbfDef */ JWT::$leeway = 60; // $leeway in seconds $decoded = JWT::decode($jwt, new Key($key, 'HS256')); ``` Example with RS256 (openssl) ---------------------------- ```php use Firebase\JWT\JWT; use Firebase\JWT\Key; $privateKey = <<<EOD -----BEGIN RSA PRIVATE KEY----- MIICXAIBAAKBgQC8kGa1pSjbSYZVebtTRBLxBz5H4i2p/llLCrEeQhta5kaQu/Rn vuER4W8oDH3+3iuIYW4VQAzyqFpwuzjkDI+17t5t0tyazyZ8JXw+KgXTxldMPEL9 5+qVhgXvwtihXC1c5oGbRlEDvDF6Sa53rcFVsYJ4ehde/zUxo6UvS7UrBQIDAQAB AoGAb/MXV46XxCFRxNuB8LyAtmLDgi/xRnTAlMHjSACddwkyKem8//8eZtw9fzxz bWZ/1/doQOuHBGYZU8aDzzj59FZ78dyzNFoF91hbvZKkg+6wGyd/LrGVEB+Xre0J Nil0GReM2AHDNZUYRv+HYJPIOrB0CRczLQsgFJ8K6aAD6F0CQQDzbpjYdx10qgK1 cP59UHiHjPZYC0loEsk7s+hUmT3QHerAQJMZWC11Qrn2N+ybwwNblDKv+s5qgMQ5 5tNoQ9IfAkEAxkyffU6ythpg/H0Ixe1I2rd0GbF05biIzO/i77Det3n4YsJVlDck ZkcvY3SK2iRIL4c9yY6hlIhs+K9wXTtGWwJBAO9Dskl48mO7woPR9uD22jDpNSwe k90OMepTjzSvlhjbfuPN1IdhqvSJTDychRwn1kIJ7LQZgQ8fVz9OCFZ/6qMCQGOb qaGwHmUK6xzpUbbacnYrIM6nLSkXgOAwv7XXCojvY614ILTK3iXiLBOxPu5Eu13k eUz9sHyD6vkgZzjtxXECQAkp4Xerf5TGfQXGXhxIX52yH+N2LtujCdkQZjXAsGdm B2zNzvrlgRmgBrklMTrMYgm1NPcW+bRLGcwgW2PTvNM= -----END RSA PRIVATE KEY----- EOD; $publicKey = <<<EOD -----BEGIN PUBLIC KEY----- MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC8kGa1pSjbSYZVebtTRBLxBz5H 4i2p/llLCrEeQhta5kaQu/RnvuER4W8oDH3+3iuIYW4VQAzyqFpwuzjkDI+17t5t 0tyazyZ8JXw+KgXTxldMPEL95+qVhgXvwtihXC1c5oGbRlEDvDF6Sa53rcFVsYJ4 ehde/zUxo6UvS7UrBQIDAQAB -----END PUBLIC KEY----- EOD; $payload = [ 'iss' => 'example.org', 'aud' => 'example.com', 'iat' => 1356999524, 'nbf' => 1357000000 ]; $jwt = JWT::encode($payload, $privateKey, 'RS256'); echo "Encode:\n" . print_r($jwt, true) . "\n"; $decoded = JWT::decode($jwt, new Key($publicKey, 'RS256')); /* NOTE: This will now be an object instead of an associative array. To get an associative array, you will need to cast it as such: */ $decoded_array = (array) $decoded; echo "Decode:\n" . print_r($decoded_array, true) . "\n"; ``` Example with a passphrase ------------------------- ```php use Firebase\JWT\JWT; use Firebase\JWT\Key; // Your passphrase $passphrase = '[YOUR_PASSPHRASE]'; // Your private key file with passphrase // Can be generated with "ssh-keygen -t rsa -m pem" $privateKeyFile = '/path/to/key-with-passphrase.pem'; // Create a private key of type "resource" $privateKey = openssl_pkey_get_private( file_get_contents($privateKeyFile), $passphrase ); $payload = [ 'iss' => 'example.org', 'aud' => 'example.com', 'iat' => 1356999524, 'nbf' => 1357000000 ]; $jwt = JWT::encode($payload, $privateKey, 'RS256'); echo "Encode:\n" . print_r($jwt, true) . "\n"; // Get public key from the private key, or pull from from a file. $publicKey = openssl_pkey_get_details($privateKey)['key']; $decoded = JWT::decode($jwt, new Key($publicKey, 'RS256')); echo "Decode:\n" . print_r((array) $decoded, true) . "\n"; ``` Example with EdDSA (libsodium and Ed25519 signature) ---------------------------- ```php use Firebase\JWT\JWT; use Firebase\JWT\Key; // Public and private keys are expected to be Base64 encoded. The last // non-empty line is used so that keys can be generated with // sodium_crypto_sign_keypair(). The secret keys generated by other tools may // need to be adjusted to match the input expected by libsodium. $keyPair = sodium_crypto_sign_keypair(); $privateKey = base64_encode(sodium_crypto_sign_secretkey($keyPair)); $publicKey = base64_encode(sodium_crypto_sign_publickey($keyPair)); $payload = [ 'iss' => 'example.org', 'aud' => 'example.com', 'iat' => 1356999524, 'nbf' => 1357000000 ]; $jwt = JWT::encode($payload, $privateKey, 'EdDSA'); echo "Encode:\n" . print_r($jwt, true) . "\n"; $decoded = JWT::decode($jwt, new Key($publicKey, 'EdDSA')); echo "Decode:\n" . print_r((array) $decoded, true) . "\n"; ```` Using JWKs ---------- ```php use Firebase\JWT\JWK; use Firebase\JWT\JWT; // Set of keys. The "keys" key is required. For example, the JSON response to // this endpoint: https://www.gstatic.com/iap/verify/public_key-jwk $jwks = ['keys' => []]; // JWK::parseKeySet($jwks) returns an associative array of **kid** to Firebase\JWT\Key // objects. Pass this as the second parameter to JWT::decode. JWT::decode($payload, JWK::parseKeySet($jwks)); ``` Using Cached Key Sets --------------------- The `CachedKeySet` class can be used to fetch and cache JWKS (JSON Web Key Sets) from a public URI. This has the following advantages: 1. The results are cached for performance. 2. If an unrecognized key is requested, the cache is refreshed, to accomodate for key rotation. 3. If rate limiting is enabled, the JWKS URI will not make more than 10 requests a second. ```php use Firebase\JWT\CachedKeySet; use Firebase\JWT\JWT; // The URI for the JWKS you wish to cache the results from $jwksUri = 'https://www.gstatic.com/iap/verify/public_key-jwk'; // Create an HTTP client (can be any PSR-7 compatible HTTP client) $httpClient = new GuzzleHttp\Client(); // Create an HTTP request factory (can be any PSR-17 compatible HTTP request factory) $httpFactory = new GuzzleHttp\Psr\HttpFactory(); // Create a cache item pool (can be any PSR-6 compatible cache item pool) $cacheItemPool = Phpfastcache\CacheManager::getInstance('files'); $keySet = new CachedKeySet( $jwksUri, $httpClient, $httpFactory, $cacheItemPool, null, // $expiresAfter int seconds to set the JWKS to expire true // $rateLimit true to enable rate limit of 10 RPS on lookup of invalid keys ); $jwt = 'eyJhbGci...'; // Some JWT signed by a key from the $jwkUri above $decoded = JWT::decode($jwt, $keySet); ``` Miscellaneous ------------- #### Exception Handling When a call to `JWT::decode` is invalid, it will throw one of the following exceptions: ```php use Firebase\JWT\JWT; use Firebase\JWT\SignatureInvalidException; use Firebase\JWT\BeforeValidException; use Firebase\JWT\ExpiredException; use DomainException; use InvalidArgumentException; use UnexpectedValueException; try { $decoded = JWT::decode($payload, $keys); } catch (InvalidArgumentException $e) {