[iText-questions] PDF signature

Hi, I try to understand how you have developped your TSA request in order to make it by myself. I understood you need to hash 3 times the data (once without OCSP response, once with OCSP response, once with OCSP response and RSA encryted data) before encapsulating it in your TSA request and se

[iText-questions] URGENT : PDF signature

Hi, I'm new on your forum, I'm currently trying to sign a PDF file. I understood that iText library can be used for that but I would like to develop it by myself. I have tried to search documents explaining the principle of the PDF signature but my program does not sign correctly. So please