Tilman Hausherr created PDFBOX-3552:
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             Summary: Allow external signing in two steps
                 Key: PDFBOX-3552
                 URL: https://issues.apache.org/jira/browse/PDFBOX-3552
             Project: PDFBox
          Issue Type: Improvement
          Components: Signing
    Affects Versions: 2.0.3
            Reporter: Tilman Hausherr
            Assignee: Tilman Hausherr
             Fix For: 2.0.4, 2.1.0


As requested by user Fabricio Pombo Koch in the mailing list:
{quote}
I'm trying to sign a PDF with an external service. This service receives the 
PDF's content (hash) and returns the signature (hash).
I followed the "CreateSignature" and "CreateVisibleSignature" examples and I 
was able to make it works.
But, I need to sign the PDF in 2 steps:    1- Get PDF's content, calculate the 
hash and send the hash to the service that is responsible to sign the hash.
    2- Get the signature hash returned from the service and insert it into my 
PDF. 

Note that in the 2nd step I'm not in the same context from 1st step, so, I 
can't access the PDF that was loaded in step 1. I would need to load it again.
{quote}




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