Hi Experts
Though there are scores of questions answered on this, i (very possible
it's a mistake i am making) am unable to find a solution to this!.
I am stuck with a problem
I signed a pdf document using following code..
String pfxSource = "abcd.pfx";
String RESOURCE = $fileName;
String RESULT = $fileName_res;
KeyStore ks = KeyStore.getInstance("PKCS12");
ks.load(new FileInputStream(pfxSource), <pfx
password>.toCharArray());
String alias = (String)ks.aliases().nextElement();
PrivateKey key = (PrivateKey)ks.getKey(alias, <pfx
password>.toCharArray());
Certificate[] chain = ks.getCertificateChain(alias);
PdfReader reader = new PdfReader(RESOURCE);
FileOutputStream os = new FileOutputStream(RESULT);
PdfStamper stamper = PdfStamper.createSignature(reader, os,
'\0');
stamper.setEncryption(true, null, null
,PdfWriter.ALLOW_PRINTING); ----- A
PdfSignatureAppearance appearance =
stamper.getSignatureAppearance();
appearance.setCrypto(key, chain,
null,PdfSignatureAppearance.SELF_SIGNED);
Rectangle rectangle = new Rectangle(310, 50, 510, 100);
appearance.setVisibleSignature(rectangle, 1, null);
stamper.close();
This way i applied a digital signature to the file and locked all its
properties..only allowing printing (please refer to mark A)
I accidentally deleted the source file and now have to create it back
from this result file...but am unable to do so. I am unable to open the
file using a PdfReader..It says
"PdfReader not opened with owner password"
Or is there any other way to remove the digital signature, or to strip
content from a signed file?
What can possibly be the owner password. (Sorry, of course the problem i
am facing is due to my lack of knowledge...)
I really have gone through almost whole mail archive before asking it
here. Please help..thanks a lot!!
Thanks & Regards
Shwetank
5908
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