Update WC_Gateway_Payfull.php

fix hash

wp-content/plugins/payfull/src/WC_Gateway_Payfull.php

@@ -487,26 +487,19 @@ public function payfull_check_payment_response()
         wp_redirect($redirect_url);
     }
 
-    protected function payfull_generateHash($params)
+    protected function payfull_generateHash($data)
     {
         $arr = [];
-        unset($params['hash']);
+        unset($data['hash']);
 
-        foreach($params as $param_key => $param_val) {
-            $arr[strtolower($param_key)] = $param_val;
-
-        }
-        ksort($arr);
-        $hashString_char_count = "";
-
-        foreach ($arr as $key => $val) {
-            $l =  mb_strlen($val);
-            $hashString_char_count .= $l . $val;
+        $message = '';
+        ksort($data);
+        foreach($data as $key=>$value) {
+            $l = mb_strlen($value);
+            $message .= $l . $value;
         }
-
-        $hashString_char_count      = strtolower(hash_hmac("sha1", $hashString_char_count, $this->password));
-
-        return $hashString_char_count;
+        $hash = hash_hmac('sha256', $message, $this->password);
+        return $hash;
     }
 
     protected function payfull_processPaymentResponse($order, $response)