Protect PowerPoint Slides using C++

01_Protect_PowerPoint_Slides_C++

Protect PowerPoint Slides with Password and Digital Signature using C++

Protect-PowerPoint-Slides-With-Digital-Signature.cpp

// File paths
const String sourceFilePath = u"SourceDirectory\\SamplePresentation.pptx";
const String signatureFilePath = u"SourceDirectory\\testsignature1.pfx";
const String outputFilePath = u"OutputDirectory\\digital-signature-presentation.pptx";

// Load the presentation file
SharedPtr<Presentation> presentation = MakeObject<Presentation>(sourceFilePath);

// Create DigitalSignature object with PFX file and password
SharedPtr<DigitalSignature> signature = MakeObject<DigitalSignature>(signatureFilePath, u"testpass1");

// Add comment
signature->set_Comments(u"Test Comments");

// Add digital signature to presentation
presentation->get_DigitalSignatures()->Add(signature);

// Save the presentation
presentation->Save(outputFilePath, SaveFormat::Pptx);

Protect-PowerPoint-Slides-With-Password.cpp

// File paths
const String sourceFilePath = u"SourceDirectory\\SamplePresentation.pptx";
const String outputFilePath = u"OutputDirectory\\protected-presentation.pptx";

// Load the presentation file
SharedPtr<Presentation> presentation = MakeObject<Presentation>(sourceFilePath);

// Protect presentation with password
presentation->get_ProtectionManager()->Encrypt(u"password");

// Save the presentation
presentation->Save(outputFilePath, SaveFormat::Pptx);

Verify-Digitally-Signed-PowerPoint-Slides.cpp

// File path
const String sourceFilePath = u"SourceDirectory\\digital-signature-presentation.pptx";

// Load the presentation file
SharedPtr<Presentation> presentation = MakeObject<Presentation>(sourceFilePath);

// Check if presentation has digital signatures
if (presentation->get_DigitalSignatures()->get_Count() > 0)
{
	bool allSignaturesAreValid = true;

	Console::WriteLine(u"Signatures used to sign the presentation: ");

	// Verify digital signatures
	for (int i = 0; i < presentation->get_DigitalSignatures()->get_Count(); i++)
	{
		SharedPtr<IDigitalSignature> signature = presentation->get_DigitalSignatures()->idx_get(i);

		Console::WriteLine(System::Convert::ToString(signature->get_SignTime()) + u" -- " + (signature->get_IsValid() ? u"VALID" : u"INVALID"));
		if (signature->get_IsValid() == false)
		{
			allSignaturesAreValid = false;
		}
	}

	if (allSignaturesAreValid)
	{
		Console::WriteLine(u"Presentation is genuine, all signatures are valid.");
	}
	else
	{
		Console::WriteLine(u"Presentation has been modified since signing.");
	}
}