title: I can't open my decrypt Amazon Selling Partner Feed Document
body: <p>I see this image when I try to read the file. Is this normal?</p>
  <p><a href="https://i.stack.imgur.com/f6fPs.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/f6fPs.png" alt="enter image description here" /></a></p>
  <p>My code</p>
  <pre><code> public function openTheFeedDocument() {
  
          $data = json_decode($this-&gt;getFeedDocument());
  
          $url = $data-&gt;payload-&gt;url;
          $iv  = base64_decode($data-&gt;payload-&gt;encryptionDetails-&gt;initializationVector);
          $key = base64_decode($data-&gt;payload-&gt;encryptionDetails-&gt;key);
  
          $decryptedData = openssl_decrypt(file_get_contents($url), 'AES-256-CBC', $key, OPENSSL_RAW_DATA, $iv);
  
          $raw_document =  mb_convert_encoding($decryptedData, 'UTF-8', 'ASCII, JIS, UTF-8, SJIS');
  
          echo $raw_document;
      }
  </code></pre>