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bernhard_63
Participant
March 4, 2017
Question

Signature check seems to be wrong in - Acrobat Reader DC

  • March 4, 2017
  • 2 replies
  • 849 views

The reader doesn't show all certificates of the chain and the check seems to be wrong  ( Acrobat Reader DC )

On top there should be the A-Trust-Qual-03, it's missing. The second certificate a-sign-premium-mobile-03 was outdated when the signature was created but the Reader says its OK. The signers certificates is valid from 2014-09-17 the issuers is valid till 2014-09-09  -  thats realy strange, and I think it's wrong to show the cert chain as correct.

A former version of the Reader seems to show right results for the same document.

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    2 replies

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    bernhard_63Author
    Participant
    March 11, 2017

    Hi Adobe,
    no feed back about this issue?

    I think the reader has a real bug and that exists since several versions  -  and it's now worse than it ever had been. The actual versions shows a wrong certificate chain.  :-(

    regards
    Bernhard Lassy

    B
    bernhard_63Author
    Participant
    March 4, 2017

    Is my interpretation wrong or is that a bug in the Reader-Software?

    best regards
    Bernard

    B
    bernhard_63Author
    Participant
    March 4, 2017

    There is a program Digiseal V3 which allows to check PDF-documents. This software shows different values for the middle certificate. How is this possible, and why shows the PDF-Reader not the same values and verifies the document with a brocken certificat-chain?

    With data shown by Digiseal the verfication is Ok because all certificates are valid at creation of the signature.  Either the PDF-Reader or Digiseal is wrong, but which program can be trusted?

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