Hi ,
Thanks for your help Adam.
Today I have tried to change the permissions of my PDF, and your code worked
fine ... I access the PDF using 'Owner Password'.
My problem is I want to write to the encrypted PDF ... This works fine,
until the line of saving the PDF, I get this Exception :
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at
org.apache.pdfbox.pdmodel.encryption.StandardSecurityHandler.prepareDocumentForEncryption(StandardSecurityHandler.java:261)
at org.apache.pdfbox.pdfwriter.COSWriter.write(COSWriter.java:1002)
This exception just appears even if I don't write anything in the PDF ...
Just when I try to save it, ex :
pdfFile = PDDocument.load( file ); // Open this pdf to edit.// Decrypt the pdf
if it's encrypted :
if( pdfFile.isEncrypted() ) { StandardDecryptionMaterial dm = new
StandardDecryptionMaterial( "1234" );
pdfFile.openProtection( dm );
}
pdfFile.save( file ); // Exception here.
pdfFile.close();
Best regards ,
Hesham
--------------------------------------------------
From: <a...@swmc.com>
Sent: Friday, October 30, 2009 5:53 PM
To: <pdfbox-users@incubator.apache.org>
Cc: <pdfbox-users@incubator.apache.org>
Subject: Re: PDF Permissions
Here are the basics:
PDDocument doc = null;
try {
doc = PDDocument.load(someFile);
StandardDecryptionMaterial sdm = new
StandardDecryptionMaterial("yourPasswordGoesHere");
doc.openProtection(sdm);
// use the document like normal
} catch(...) {
// decryption error
} finally {
if(doc != null)
doc.close();
}
"Hesham G." <heshamgne...@gmail.com>
10/30/2009 04:37
Please respond to
pdfbox-users@incubator.apache.org
To
<pdfbox-users@incubator.apache.org>
cc
Subject
Re: PDF Permissions
I am having problems with encrypted PDFs too. I don't know but I think
there
are things wrong with the Encryption / Decryption classes.
Best regards ,
Hesham
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