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https://issues.apache.org/jira/browse/PDFBOX-3984?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16292793#comment-16292793
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Alexis Suter commented on PDFBOX-3984:
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Thanks for the feedback.
* Maybe it depends on the Acrobat Version. Or more possibly: it is because the
root certificate is not trusted yet. Can be done by showing the root
certificate and then add it to the trusted.
!screenshot-1.png!
* Have changed handling of dictionaries, with a generic method. Thank you I had
to try harder.
* Changed SHA1DigestCalculator.getDigest() to MessageDigest
* CertInformationHelper: I wanted to access static methods directly in
CertInformationCollector. But that might have been a bit lazy ;-) Changed to
full static. The public methods might be useful from outside.
* COSStream, changed
* doValidation(): this has to do with the dictionaries?
> Add validation data of signer to document
> -----------------------------------------
>
> Key: PDFBOX-3984
> URL: https://issues.apache.org/jira/browse/PDFBOX-3984
> Project: PDFBox
> Issue Type: Improvement
> Components: Signing
> Affects Versions: 2.0.7
> Reporter: Alexis Suter
> Attachments: 1_only_signed.pdf, 2_signed_and_embeddedTs.pdf,
> 3_signed_external_timestamp.pdf, 4_resultof_signed_eTs_ocsp.pdf,
> How_LTV_looks_in_adobe.PNG, SignatureValidation_v0.1.java.patch,
> SignatureValidation_v0.2.java.patch, multi-Signature_AdobeValidation.pdf,
> multi-Signature_Base.pdf, multi-Signature_pdfBox_validation.pdf,
> screenshot-1.png
>
>
> To support Long Term Validation of a signature, we need to add a
> Valdiation-Dictionary to the document. Inside there is most importantly an
> OCSP-Response of the signers. (can be multiple).
> As Defined in [PAdES 4|https://en.wikipedia.org/wiki/PAdES] the following
> elements will be added to a document: A DSS (Document Security Store) linked
> to the VRI(s) of the signature(s)
> At first I will provide an example.
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