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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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33
Pdf4QtLib/sources/pdfdocumentbuilder.cpp
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@ -1143,6 +1143,31 @@ void PDFDocumentBuilder::copyAnnotation(PDFObjectReference pageReference, PDFObj
void PDFDocumentBuilder::setSecurityHandler(PDFSecurityHandlerPointer handler)
{
if (!handler)
{
handler.reset(new PDFNoneSecurityHandler());
}
PDFObjectFactory objectBuilder;
objectBuilder.beginDictionary();
objectBuilder.beginDictionaryItem("Encrypt");
PDFObject encryptionDictionaryObject = handler->createEncryptionDictionaryObject();
Q_ASSERT(!encryptionDictionaryObject.isReference());
if (!encryptionDictionaryObject.isNull())
{
encryptionDictionaryObject = PDFObject::createReference(addObject(encryptionDictionaryObject));
}
objectBuilder << encryptionDictionaryObject;
objectBuilder.endDictionaryItem();
objectBuilder.endDictionary();
PDFObject updatedTrailerDictionary = objectBuilder.takeObject();
m_storage.updateTrailerDictionary(qMove(updatedTrailerDictionary));
m_storage.setSecurityHandler(qMove(handler));
}
@ -4297,13 +4322,7 @@ void PDFDocumentBuilder::removeEncryption()
{
PDFObjectFactory objectBuilder;
objectBuilder.beginDictionary();
objectBuilder.beginDictionaryItem("Encrypt");
objectBuilder << PDFObject();
objectBuilder.endDictionaryItem();
objectBuilder.endDictionary();
PDFObject updatedTrailerDictionary = objectBuilder.takeObject();
m_storage.updateTrailerDictionary(qMove(updatedTrailerDictionary));
setSecurityHandler(nullptr);
}