Check signature on PDF File

OpenPdf.java

  ByteArrayInputStream pdfBytes=new ByteArrayInputStream(
                    Files.readAllBytes(Paths.get(pdfFile.getAbsolutePath())));

  pdfDoc=PDDocument.load(pdfFile);

  pdfDoc.getSignatureDictionaries().forEach(signature-> {
                try {
                     //Get PKCS#7 Data
                     CMSSignedData signedData=new CMSSignedData(signature.getContents());
                    }