From 27518274b5ee097354b00ea7ec4f746c1a676b24 Mon Sep 17 00:00:00 2001
From: Rene Korss <rene.korss@gmail.com>
Date: Fri, 3 Feb 2023 16:01:31 +0200
Subject: [PATCH] Add PHP 8 support

---
 src/Protocol/IPizza.php | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/Protocol/IPizza.php b/src/Protocol/IPizza.php
index 512378f..a074403 100644
--- a/src/Protocol/IPizza.php
+++ b/src/Protocol/IPizza.php
@@ -178,7 +178,7 @@ public function __construct(
         $this->requestUrl = $requestUrl;
 
         // Detect which service to use
-        if (strlen($sellerName) > 0 && strlen($sellerAccount) > 0) {
+        if (is_string($sellerName) && strlen($sellerName) > 0 && is_string($sellerAccount) && strlen($sellerAccount) > 0) {
             $this->serviceId = Services::PAYMENT_REQUEST_1011;
             return;
         }
@@ -443,7 +443,11 @@ public function getSignature(array $data, string $encoding = 'UTF-8') : string
         }
 
         openssl_sign($mac, $signature, $privateKey, $this->algorithm);
-        openssl_free_key($privateKey);
+
+        // Only needed if < PHP 8
+        if (version_compare(PHP_VERSION, '8.0.0', '<')) {
+            openssl_free_key($privateKey);
+        }
 
         $result = base64_encode($signature);
 
@@ -512,7 +516,11 @@ protected function validateSignature(array $response, string $encoding = 'UTF-8'
         }
 
         $this->result = openssl_verify($data, base64_decode($response[static::FIELD_MAC]), $publicKey, $this->algorithm);
-        openssl_free_key($publicKey);
+
+        // Only needed if < PHP 8
+        if (version_compare(PHP_VERSION, '8.0.0', '<')) {
+            openssl_free_key($publicKey);
+        }
 
         return $this->result === 1;
     }