How to add signature With Time Stamp Authority (tsa)?

[ngochoaitn]

Summary of the issue

PdfSignatureAppearance.SetCrypto haven't TsaClient param How to add signature With Time Stamp Authority?

Environment

iTextSharp.LGPLv2.Core version: 1.7.3
.NET Core SDK version: .NET5
IDE: Visual Studio 2019

Example code/Steps to reproduce:

sap.SetCrypto(_asymmetricKeyParameter, _chain, null, PdfSignatureAppearance.SelfSigned);

Output:

Pdf file signed but haven't Time Stamp Authority

Thanks