Lazy vytvoření klíčů

 - je to celkem náročná operace
 - nevytváříme tak zbytečně klíče, když je AsymetricJwtTokenizer uvedený jako závislost, ale při aktuálním běhu aplikace ho nevyužijeme

src/Tokenizer/AsymetricJwtTokenizer.php

@@ -9,38 +9,76 @@ final class AsymetricJwtTokenizer implements Tokenizer
 
 
 	/**
-	 * @var mixed
+	 * @var \OpenSSLAsymmetricKey|resource
 	 */
 	private $privateKey;
 
+	private string $privateKeyFile;
+
 	/**
-	 * @var mixed
+	 * @var \OpenSSLAsymmetricKey|resource
 	 */
 	private $publicKey;
 
+	private string $publicKeyFile;
+
 
 	public function __construct(
 		string $privateKey,
 		string $publicKey
 	)
 	{
-		$this->privateKey = \openssl_pkey_get_private('file://' . $privateKey);
-		$this->publicKey = \openssl_pkey_get_public('file://' . $publicKey);
+		$this->privateKeyFile = $privateKey;
+		$this->publicKeyFile= $publicKey;
 	}
 
 
 	public function create(\Pd\PublicAccess\PublicAccess $object): string
 	{
-		return \Firebase\JWT\JWT::encode($object->jsonSerialize(), $this->privateKey, self::ALGORITHM);
+		return \Firebase\JWT\JWT::encode($object->jsonSerialize(), $this->privateKey(), self::ALGORITHM);
 	}
 
 
 	public function decode(string $token): \stdClass
 	{
 		/** @var \stdClass $decode */
-		$decode = \Firebase\JWT\JWT::decode($token, new \Firebase\JWT\Key($this->publicKey, self::ALGORITHM));
+		$decode = \Firebase\JWT\JWT::decode($token, new \Firebase\JWT\Key($this->publicKey(), self::ALGORITHM));
 
 		return $decode;
 	}
 
+
+	/**
+	 * @return \OpenSSLAsymmetricKey|resource
+	 */
+	private function privateKey()
+	{
+		if ( ! isset($this->privateKey)) {
+			$this->privateKey = \openssl_pkey_get_private('file://' . $this->privateKeyFile);
+
+			if ($this->privateKey === FALSE) {
+				throw new \RuntimeException('Invalid private key for JWT tokenizer');
+			}
+		}
+
+		return $this->privateKey;
+	}
+
+
+	/**
+	 * @return \OpenSSLAsymmetricKey|resource
+	 */
+	private function publicKey()
+	{
+		if ( ! isset($this->publicKey)) {
+			$this->publicKey = \openssl_pkey_get_public('file://' . $this->publicKeyFile);
+
+			if ($this->publicKey === FALSE) {
+				throw new \RuntimeException('Invalid public key for JWT tokenizer');
+			}
+		}
+
+		return $this->publicKey;
+	}
+
 }