Update to using php 8

.github/workflows/php.yml

@@ -12,26 +12,26 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Composer run action PHPUnit
-      uses: MayMeowHQ/composer-run-action@v1
+      uses: MayMeowHQ/composer-run-action@v4
       with:
         composer_script: 'test'
 
 
-  codesniffer:
+  cs-check:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
     - name: Composer run action PHPC_CS
-      uses: MayMeowHQ/composer-run-action@v1
+      uses: MayMeowHQ/composer-run-action@v4
       with:
-        composer_script: 'codesniffer'
+        composer_script: 'cs-check'
 
   stan:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
     - name: Composer run action PHPStan
-      uses: MayMeowHQ/composer-run-action@v1
+      uses: MayMeowHQ/composer-run-action@v4
       with:
         composer_script: 'stan'
 

composer.json

@@ -18,7 +18,8 @@
         }
     ],
     "require": {
-        "php": "7.4.*"
+        "php": "8.0.*",
+        "ext-openssl": "*"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.5",
@@ -27,7 +28,7 @@
     },
     "scripts": {
         "test": "phpunit tests",
-        "codesniffer": "phpcs --standard=PSR2 src",
+        "cs-check": "phpcs --standard=PSR2 src",
         "stan": "phpstan analyse"
     }
 }

docker/devcontainer/Dockerfile

@@ -1,4 +1,4 @@
-FROM ghcr.io/maymeow/php-ci-cd/php-ci-cd:7.4.16-cs-1
+FROM ghcr.io/maymeow/php-ci-cd/php-ci-cd:8.0.11-cs
 
 # arguments in docker-compose file
 ARG user=vscode

src/RSACryptoServiceProvider.php

@@ -128,12 +128,10 @@ public function getFingerPrint(string $publicKey = null) : string
     }
 
     /**
-     * Returns RSA Parameters private key
-     *
-     * @return resource|string
+     * @return \OpenSSLAsymmetricKey|string
      * @throws Exceptions\DecryptPrivateKeyException
      */
-    private function getPrivateKey()
+    private function getPrivateKey() : \OpenSSLAsymmetricKey|string
     {
         return $this->parameters->getPrivateKey();
     }

src/RSAParameters.php

@@ -48,10 +48,10 @@ public function generateKeys(?string $passphrase = null, ?array $configArgs = nu
     }
 
     /**
-     * @return resource|string
+     * @return string|\OpenSSLAsymmetricKey
      * @throws DecryptPrivateKeyException
      */
-    public function getPrivateKey()
+    public function getPrivateKey() : \OpenSSLAsymmetricKey|string
     {
         if ($this->passphrase != null && $this->privateKey != null) {
             $privateKeyResource = openssl_pkey_get_private($this->privateKey, $this->passphrase);