1. Feedback
  2. ASP.NET Core
  3. 68146

Welcome to the ASP.NET Core feedback portal. We’re happy you’re here! If you have feedback on how to improve the ASP.NET Core, we’d love to hear it!

  • Check out the features or bugs others have reported and vote on your favorites. Feedback will be prioritized based on popularity.
  • If you have feedback that’s not listed yet, submit your own.

Thanks for joining our community and helping improve Syncfusion products!

1
Vote

PDF Signature - display signer name and correct sign time in signature appearance

Hello,

We managed to successfully implement a deferred(2 step) signing process using Syncfusion PDF. The steps in our process are:


1 - Prepare the PDF file - add text and empty signature.

2 - Get digest of the PDF that should be signed.

3 - Send the digest to external provider.

4 - Signer signs using the external provider mobile app.

5 - Receive the signed digest from our external provider.

6 - Complete the signature by adding the signed digest in the signature field.


So far so good, we successfully build a valid QES with embedded timestamp and LTV enabled. Now we have to add visualization for the signature in the PDF, which must include the name of the signer and the correct signing date and time (the date and time the signer has signed in the external provider app - this information is available when we receive the signed data). 


We found a way to add visualization for the signature in the first step of the deferred signing process, but in this case the date and time are different than the actual signing date and time, which is visible in the signature properties, when opening the file with Adobe.


Attached you can find the code we are using for both steps, plus the implementations of the IPdfExternalSigner.


Is this possible to be done with Syncfusion PDF?

Could you please help us with the implementation?


Thank you in advance,
Kiril