- PDF SIGNATURE PROBLEM HOW TO
- PDF SIGNATURE PROBLEM PDF
- PDF SIGNATURE PROBLEM CODE
Select the " Trust" tab in the "Certificate Viewer" window, where you can now see that the certificate is not trusted.
In the next window, you have the option to add the certificate to Adobe Reader's list of trusted certificates - that is, if this is a valid certificate. Press "Show Signer's Certificate." after which you can see information about the certificate.When you have pressed "Show signature Properties." a pop-up will appear, in the pop-up you must access the signing certificate Right-click with your mouse on the signature that reports an error.Tap on "Signature Panel" if it is not already open.If the error "At least one signature has problems" is still visible, it requires us to go into the settings for a signature, by browsing the certificate. however, I would recommend that you take a look here, to see what you can so in the future If the signatures are successfully validated, Adobe Reader displays that the documents are signed and all signatures are valid. Make the certificate a trusted identity in your Adobe reader We will now go through other possible issues, that aren't related to the design of the file.
PDF SIGNATURE PROBLEM PDF
The document is now saved as a PDF file (again) this time however, any elements that would not have been shown properly by Adobe, (And changed after signing!) are changed to adobe standards. Select the printer: Microsoft print to PDF. Open the original Non-signed document, and click File in upper right hand corner. The following fix does not alter the document in any way that simply signing the document usually wouldn't, but it does ensure that when the document is signed, it will verify the signature correctly. PDF SIGNATURE PROBLEM CODE
Note - this report code and description, does not always show, even if this issue is the case.
If the PDF was made in an older version of Adobe Acrobat, or some other form of file editing program, Adobe may have an issue validating the signature, as the document is altered once Adobe opens it, with the signature.Ĭertain Fonts, colors or images may cause this issue.
PDF SIGNATURE PROBLEM HOW TO
We will now guide you through how to "fix" the document, in order to avoid this issue with future signings. These can be design elements or javascript that cause images or fonts to change when the document is opened in Adobe.
The certificate is not an LTV (Long Term Validation) document - This requires a time stamp for the signature.Ī very common reason for this problem is that the original PDF (Before the Signature) contains design elements that are not supported by Adobe. The signer's identity is not captured and embedded in the document. The certificate used to sign is not an AATL/EUTL certificate. I also tried to use the ExternalSigningSupport from PDFBox but I cannot use it as I always run into an error: ": signature reserve byte range has been changed after addSignature(), please set the byte range that existed after addSignature()".If you experience this error, it can therefore mean the following: I then get the correct and valid signature hash back from the API and I can add it to the PDDocument but whenever this works, the resulting pdf has an invalid signature due to "being altered or manipulated"(the signer, timestamp and certificate are valid). I can create the PDDocument, the PDSignature and the digest of it and send it to the API. Awaiting a successful answer from the API (containing the signature hash) and inserting this hash into the PDDocuments PDSignature object without altering the whole document. adding this signature object to the PDDocument and creating a digest from the PDDocument to send to the API. 
creating a PDSignature with all given properties such as organisation or location but without the signature-hash itself. Creating a PDDocument with the content of the given pdf. I am trying to sign a pdf with PDFBox and a third-party signature provider.
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