Sign PDF with a certificate and a signed hash returned from a 3rd party?

Question:

I need to sign a PDF with a certificate and a signed hash returned from a 3rd party.

Answer:

It’s possible, and it’s a feature that was introduced in the latest version of Chilkat (v9.5.0.96).

However, it requires a well-defined REST API (or something similar) where Chilkat can make the REST API call
from within the PDF signing process.   Current supported REST API’s include AWS KMS, Azure KeyVault, and ARSS (Aruba Remote Signing Service)

See these C# examples.

https://www.example-code.com/csharp/arss_sign_pdf.asp
https://www.example-code.com/csharp/azure_keyvault_sign_pdf.asp
https://www.example-code.com/csharp/aws_kms_sign_pdf.asp

The solution would be to understand your 3rd party signing service, and then incorporate that knowledge into
Chilkat so that it’s also supported.