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Posted to dev@pdfbox.apache.org by "Michael Klink (JIRA)" <ji...@apache.org> on 2015/11/02 14:10:27 UTC

[jira] [Comment Edited] (PDFBOX-3017) Improve document signing

    [ https://issues.apache.org/jira/browse/PDFBOX-3017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14985190#comment-14985190 ] 

Michael Klink edited comment on PDFBOX-3017 at 11/2/15 1:10 PM:
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{quote}
{{prepareNonVisualSignature}} clears the AcroForm *DR* ({{acroForm.setDefaultResources(null)}}) which is not good if there are other form fields
{quote}

The pendant for this issue in the context of visual signatures has been observed in real life, cf. the stackoverflow posting [PDFBox 1.8.10: Fill and Sign Document, Filling again fails|http://stackoverflow.com/a/33174411/1729265].


was (Author: mkl):
{quote}
{{prepareNonVisualSignature}} clears the AcroForm *DR* ({{acroForm.setDefaultResources(null)}}) which is not good if there are other form fields
{quote}

This issue has been observed in real life, cf. the stackoverflow posting [PDFBox 1.8.10: Fill and Sign Document, Filling again fails|http://stackoverflow.com/a/33174411/1729265].

> Improve document signing
> ------------------------
>
>                 Key: PDFBOX-3017
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-3017
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: Signing
>    Affects Versions: 2.0.0
>            Reporter: Tilman Hausherr
>
> Improve signing code:
> - incremental save only works for signatures and doesn't respect certificates such as Adobe Extended Usage Rights
> - {{prepareNonVisualSignature}} clears the AcroForm DR {{acroForm.setDefaultResources(null)}} which is not good if there are other form fields
> - visual/nonVisualSignature should move into the {{interactive.forms}} package and be handled within the signature field
> - verify signature (to have tests that go full circle)
> - document or refactor / rewrite visible labyrinthine signature code
> - ... your ideas...



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