[
https://issues.apache.org/jira/browse/PDFBOX-4239?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16506005#comment-16506005
]
Maruan Sahyoun commented on PDFBOX-4239:
----------------------------------------
If you have a signed document there are two choices
- do a full save -> will make the existing signature invalid
- do an incremental save -> will keep the existing signature. In Adobe
Reader/Acrobar you will still see a hint that the document was changed
afterwards
Now - for actions other than signing - there is no good support for incremental
save in PDFBox. You'd need to walks through the changes objects yourself and
mark them using {{setNeedToBeUpdated}} for saving and then use
{{PDDocument.saveIncremental}}. Although that should work there will be some
try and error - see PDFBOX-45
> How to avoid invalid signature after pdfbox modify a signed PDF
> ---------------------------------------------------------------
>
> Key: PDFBOX-4239
> URL: https://issues.apache.org/jira/browse/PDFBOX-4239
> Project: PDFBox
> Issue Type: Wish
> Components: Signing
> Affects Versions: 2.0.2
> Reporter: Lux
> Priority: Major
> Attachments: 0608_1.jpg
>
>
> Dear Team
> Our team need add some text into a signed PDF, But we got a pdf with an
> invalid signture.
> So that sometimes we can't view it on IE.
> Do you know how to avoid invalid signature after modify a signed pdf.
> Looking forward your reply. Thanks in advance.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
