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From "Tilman Hausherr (Jira)" <j...@apache.org>
Subject [jira] [Commented] (PDFBOX-4702) signature verification in Adobe products
Date Tue, 03 Dec 2019 04:39:00 GMT

    [ https://issues.apache.org/jira/browse/PDFBOX-4702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16986602#comment-16986602
] 

Tilman Hausherr commented on PDFBOX-4702:
-----------------------------------------

I added you as a "contributor" so you can add yourself there. But AFAIK this is the only advantage,
i.e. you still need one of the committers to commit your code.

Depending on the complexity of the patch we need a ICLA ( [https://www.apache.org/licenses/icla.pdf]
) but it isn't needed for things sized like you did in the past, or for refactoring, or bug
fixing.

I had a look at the last file; one difference I see is that /V is indirect. It was direct
in the "bad" file. And indirect in the default signing.

> signature verification in Adobe products
> ----------------------------------------
>
>                 Key: PDFBOX-4702
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4702
>             Project: PDFBox
>          Issue Type: Improvement
>            Reporter: Jason Pyeron
>            Priority: Major
>         Attachments: image-2019-12-01-17-33-28-155.png, image-2019-12-02-06-31-12-527.png,
image-2019-12-02-16-50-30-220.png, image-2019-12-02-16-51-06-551.png, pdfbox-4702-signed-Adobe.pdf,
pdfbox-4702-signed-PDFBOX-Tilman.pdf, pdfbox-4702-signed-PDFBOX.pdf, pdfbox-4702-unsigned-SignedAndLockedWithLocking.pdf,
pdfbox-4702-unsigned.pdf, pdfbox-4702.pdf, screenshot-1.png, test_signed.pdf
>
>
> Signatures with appearances have some unknown validation, that is resulting in "Bad parameter"
error when validating. 
> See mailing list thread: https://lists.apache.org/thread.html/dde2f9531be0126402251b9fa95bd2274c1162fe5806420cbe1ca9ee@%3Cdev.pdfbox.apache.org%3E



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