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Encryption bugfixing (RC4)

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This commit is contained in:
Jakub Melka
2021-05-30 15:37:06 +02:00
parent e3fecc0568
commit e001adc65b
11 changed files with 132 additions and 64 deletions
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46
Pdf4QtViewer/pdfprogramcontroller.cpp
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@ -24,6 +24,7 @@
#include "pdfdrawspacecontroller.h"
#include "pdfwidgetutils.h"
#include "pdfconstants.h"
#include "pdfdocumentbuilder.h"
#include "pdfviewersettings.h"
#include "pdfundoredomanager.h"
@ -1133,7 +1134,15 @@ void PDFProgramController::onActionOptimizeTriggered()
void PDFProgramController::onActionEncryptionTriggered()
{
// Check that we have owner acces to the document
auto queryPassword = [this](bool* ok)
{
QString result;
*ok = false;
onQueryPasswordRequest(&result, ok);
return result;
};
// Check that we have owner access to the document
const pdf::PDFSecurityHandler* securityHandler = m_pdfDocument->getStorage().getSecurityHandler();
pdf::PDFSecurityHandler::AuthorizationResult authorizationResult = securityHandler->getAuthorizationResult();
if (authorizationResult != pdf::PDFSecurityHandler::AuthorizationResult::OwnerAuthorized &&
@ -1142,15 +1151,6 @@ void PDFProgramController::onActionEncryptionTriggered()
// Jakub Melka: we must authorize as owner, otherwise we can't continue,
// because we don't have sufficient permissions.
pdf::PDFSecurityHandlerPointer clonedSecurityHandler(securityHandler->clone());
auto queryPassword = [this](bool* ok)
{
QString result;
*ok = false;
onQueryPasswordRequest(&result, ok);
return result;
};
authorizationResult = clonedSecurityHandler->authenticate(queryPassword, true);
if (authorizationResult != pdf::PDFSecurityHandler::AuthorizationResult::OwnerAuthorized)
@ -1167,8 +1167,30 @@ void PDFProgramController::onActionEncryptionTriggered()
onDocumentModified(qMove(document));
}
PDFEncryptionSettingsDialog dialog(m_mainWindow);
dialog.exec();
PDFEncryptionSettingsDialog dialog(m_pdfDocument->getIdPart(0), m_mainWindow);
if (dialog.exec() == QDialog::Accepted)
{
pdf::PDFSecurityHandlerPointer updatedSecurityHandler = dialog.getUpdatedSecurityHandler();
// Jakub Melka: If we changed encryption (password), recheck, that user doesn't
// forgot (or accidentally entered wrong) password. So, we require owner authentization
// to continue.
if (updatedSecurityHandler->getMode() != pdf::EncryptionMode::None)
{
if (updatedSecurityHandler->authenticate(queryPassword, true) != pdf::PDFSecurityHandler::AuthorizationResult::OwnerAuthorized)
{
QMessageBox::critical(m_mainWindow, QApplication::applicationDisplayName(), tr("Reauthorization is required to change document encryption."));
return;
}
}
pdf::PDFDocumentBuilder builder(m_pdfDocument.data());
builder.setSecurityHandler(qMove(updatedSecurityHandler));
pdf::PDFDocumentPointer pointer(new pdf::PDFDocument(builder.build()));
pdf::PDFModifiedDocument document(qMove(pointer), m_optionalContentActivity, pdf::PDFModifiedDocument::Reset);
onDocumentModified(qMove(document));
}
}
void PDFProgramController::onActionFitPageTriggered()