Stefan Strobl created PDFBOX-4689:
-------------------------------------
Summary: Invisible Signature should have empty Appearance
Dictionary
Key: PDFBOX-4689
URL: https://issues.apache.org/jira/browse/PDFBOX-4689
Project: PDFBox
Issue Type: Improvement
Components: Signing
Affects Versions: 2.0.17
Reporter: Stefan Strobl
According to TechNote 0006: Digital Signatures in PDF/A-1
[http://www.pdfa.org/wp-content/uploads/2011/08/tn0006_digital_signatures_in_pdfa-1_2008-03-141.pdf]
Section 2.4 "The visual appearance must also exist for an invisible signature
but may be empty."
This should be easily handled by modifying PDDocument as indicated below:
{code:java}
private void prepareNonVisibleSignature(PDSignatureField signatureField)
throws IOException
{
// "Signature fields that are not intended to be visible shall
// have an annotation rectangle that has zero height and width."
// Set rectangle for non-visual signature to rectangle array [ 0 0 0 0 ]
signatureField.getWidgets().get(0).setRectangle(new PDRectangle());
+ signatureField.getWidgets().get(0).setAppearance(new
PDAppearanceDictionary());
}
{code}
If this is an acceptable solution I would be happy to provide a PR
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
