PDF Certification in C++

Use PdfFileSignature for this task. The examples below retain the original C++ code and API Reference steps.

Certify PDF with mdp signature

Create a PKCS7 signature and certify page 1 with FillingInForms modification permissions and a visible signature.

1. Load the certificate and configure a PKCS7 signature object.
2. Set the certification permissions with DocMDPSignature.
3. Create PdfFileSignature.
4. Bind the PDF input with Facade::BindPdf().
5. Apply the certification signature with PdfFileSignature::Certify().
6. Save the resulting PDF with PdfFileSignature::Save().

#include <Aspose.PDF.Cpp/Facades/PdfFileSignature.h>
#include <Aspose.PDF.Cpp/InteractiveFeatures/Forms/DocMDPAccessPermissions.h>
#include <Aspose.PDF.Cpp/InteractiveFeatures/Forms/DocMDPSignature.h>
#include <Aspose.PDF.Cpp/InteractiveFeatures/Forms/PKCS7.h>
#include <drawing/rectangle.h>
#include <system/string.h>

namespace Facades::Examples::PDF_FileSignature
{
	using namespace System;
	using namespace Aspose::Pdf;
	using namespace Aspose::Pdf::Facades;
	using PKCS7 = Aspose::Pdf::Forms::PKCS7;
	using DocMDPSignature = Aspose::Pdf::Forms::DocMDPSignature;
	using DocMDPAccessPermissions = Aspose::Pdf::Forms::DocMDPAccessPermissions;

	void CertifyPdfWithMdpSignature(String inputFile, String certificateFile, String outputFile)
	{
		auto certificateSignature = MakeObject<PKCS7>(certificateFile, u"Aspose2021");
		certificateSignature->set_Reason(u"Certified for form filling and signing");
		certificateSignature->set_ContactInfo(u"[e-mail]");
		certificateSignature->set_Location(u"New York, USA");
		certificateSignature->set_Authority(u"Aspose.PDF Example");

		auto pdfSignature = MakeObject<PdfFileSignature>();
		pdfSignature->BindPdf(inputFile);
		auto signature = MakeObject<DocMDPSignature>(certificateSignature, DocMDPAccessPermissions::FillingInForms);
		pdfSignature->Certify(1, u"Certified for form filling and signing", u"[e-mail]", u"New York, USA", true,
			System::Drawing::Rectangle(10, 10, 200, 60), signature);
		pdfSignature->Save(outputFile);
	}
} // namespace Facades::Examples::PDF_FileSignature