I am trying to use iText's PdfReader to check if a given PDF file is password protected or not, but am getting this exception:
Exception in thread "Main Thread" java.lang.NoClassDefFoundError:org/bouncycastle/asn1/ASN1OctetString
But when testing the same code against a non-password protected file it runs fine. Here is the complete code:
try {
PdfReader pdf = new PdfReader("C:\\abc.pdf");
} catch (IOException e) {
e.printStackTrace();
}
Use Apache PDFBox - Java PDF Library from here:
Sample Code:
try
{
document = PDDocument.load( "C:\\abc.pdf");
if(document.isEncrypted())
{
//Then the pdf file is encrypeted.
}
}