[
https://issues.apache.org/jira/browse/PDFBOX-2776?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17220723#comment-17220723
]
Michael Klink commented on PDFBOX-2776:
---------------------------------------
{quote}The remaining problem is "have LTV" in a pdf whose signature is
"certified"
{quote}
More exactly, _in PDFs whose signature is "certified" with *no changes
allowed*_. Applying LTV to documents with signatures certified with *only form
fill-ins allowed* or with *form fill-ins and annotation creation, deletion, and
modification allowed* can be LTV-enabled just like PDFs with mere approval
signatures.
ISO 32000-2 explicitly does allow adding DSS information to PDFs whose
signature is certified with no changes allowed but Adobe Acrobat rejects such
attempts nonetheless, see PDFBOX-3017.
This might even not be a simple Acrobat bug (one could hope to be fixed
sometime soon) but actually a deviation from the standard desired by Adobe
(never to be fixed); maybe they based their implemented work flows too strictly
on PDFs not changing anymore once they are certified with no changes allowed.
> support "Long Term Validation" signature extensions (LTV)
> ---------------------------------------------------------
>
> Key: PDFBOX-2776
> URL: https://issues.apache.org/jira/browse/PDFBOX-2776
> Project: PDFBox
> Issue Type: Improvement
> Components: Signing
> Affects Versions: 2.0.0
> Reporter: Ralf Hauser
> Priority: Major
> Fix For: 3.0.0 PDFBox
>
> Attachments: nonSigPdf-sig1.pdf,
> notCertified_368835_Sig_en_201026090509.pdf,
> notCertified_368835_Sig_en_201026090509_report.png
>
>
> in recent acrobat readers, every signature is commented w.r.t. "LTV"
> ETSI TS 102 778-4 V1.1.2 (2009-12) Technical Specification
> referenced as part 4 in
> http://en.wikipedia.org/wiki/PAdES
> It would be great if pdf signatures created with PDFBox would assist in
> creatign those.
> Target test setup:
> 1) input of an unsigned PDF-1.5 document
> 2) signature with
> a) local key pair
> b) hsm
> c) remote signature service (e.g. via soap)
> 3) add ocsp response for LTV (crls typically are larger)
> ==> Result: signed pdf where acrobat reader claims it to be "LTV enabled"
> see also PDFBOX-1848
> more in
> http://stackoverflow.com/questions/26090558/ltv-enabled-signature-in-pdf
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
