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Syncfusion Feedback

PDF Viewer not displaying digital signatures

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147455 Sep 11,2019 10:05 AM UTC Sep 13,2019 08:13 AM UTC ASP.NET Core - EJ 2 3
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Tags: PDF Viewer
Pankaj Minda
Asked On September 11, 2019 10:05 AM UTC

Hi,

I have a pdf file which has digital signatures from DocuSign, when I open the same in PDF Viewer it does not display them. We only want signature to be displayed in viewer, do not require any validation of certificates or digital signing.

The same pdf when viewed in WebPdf.js from Foxit, WebViewer from PDFTron, Veify.ink show properly.

Please advice how to resolve

Regards,
Pankaj

Akshaya Arivoli [Syncfusion]
Replied On September 12, 2019 09:28 AM UTC

Hi Pankaj, 
  
Thank you for contacting Syncfusion support. 
  
We do not have support for add and validate the Digital Signature in PDF Viewer. However, we have added it to our feature request list, but we don’t have any immediate plans to implement this feature. At the planning stage for every release cycle, we review all open features. We will let you know when this feature is implemented. 
  
The status of implementation can be tracked through below feedback link, 
  

Regards, 
Akshaya 


Pankaj Minda
Replied On September 12, 2019 09:36 AM UTC

Hi Akshya,

We do not want to add digital signature neither validate them. We just want the signature image to be displayed, as I understand you internally use pdf.js and in that there is a setting to display the signatures.

Attached file for your reference.

Please help.

Regards,
Pankaj

Attachment: Invoice_009_signed_utsav_(1)_2c7d0b8.zip

Akshaya Arivoli [Syncfusion]
Replied On September 13, 2019 08:13 AM UTC

Hi Pankaj, 
 
The digital signature should validated to get the details like author, date and time of the signature. The validated details is preserved in the PDF document content stream as XObject element while saving the signed document. As we mentioned earlier, we do not have support for parsing the validated details of Digital Signature from the content stream so the validated content of signature is not rendered in the PDF Viewer. We will parse and rendered the validated details of the signature from the document while implementing the support for Digital signature in PDF viewer control. We will let you know when this feature is implemented.    
  
The status of implementation can be tracked through below feedback link,    
  
  
Please let us know if you have any concerns on this. 
  
Regards, 
Akshaya 


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