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I am developing web application. The backend is a C# WCF service, and the frontend is html, JS. I need to digitally sign a PDF using a smart card on the client side. Does anyone know how I can solve this.

marko bogdanović
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  • Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. – Community Sep 30 '22 at 14:19
  • You may be able to refer to [this case](https://stackoverflow.com/questions/28949243/how-do-i-sign-a-pdf-with-a-smart-card-in-a-web-context-using-itext) to get what you want. – Jiayao Oct 03 '22 at 03:03
  • To insert digital signature to PDF files, consider using a PDF toolkit like LEADTOOLS. See the tutorial [here](https://www.leadtools.com/help/sdk/v22/tutorials/dotnet-console-add-a-digital-signature-to-a-pdf.html) for a C# example on how to do this. (Disclaimer: I am an employee of the vendor) – Hussam Barouqa Oct 20 '22 at 14:59
  • Refer to answer https://stackoverflow.com/a/55676351/9659885 - this also points to working POC of PDF signing... – Bharat Vasant Feb 04 '23 at 07:27

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