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Issue #183: Option to ignore PDF security settings

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Jakub Melka
2024-06-27 16:00:11 +02:00
parent 3a57bc6de5
commit 8166d9f8f4
7 changed files with 78 additions and 15 deletions
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27
Pdf4QtLibCore/sources/pdfsecurityhandler.cpp
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@ -1,4 +1,4 @@
// Copyright (C) 2019-2022 Jakub Melka
// Copyright (C) 2019-2024 Jakub Melka
//
// This file is part of PDF4QT.
//
@ -52,6 +52,8 @@
namespace pdf
{
static bool s_noDrmMode = false;
template<typename T>
using openssl_ptr = std::unique_ptr<T, void(*)(T*)>;
@ -514,6 +516,16 @@ PDFSecurityHandlerPointer PDFSecurityHandler::createSecurityHandler(const PDFObj
return handler;
}
void PDFSecurityHandler::setNoDRMMode()
{
s_noDrmMode = true;
}
bool PDFSecurityHandler::isNoDRM()
{
return s_noDrmMode;
}
void PDFSecurityHandler::fillEncryptionDictionary(PDFObjectFactory& factory, bool publicKeyHandler) const
{
factory.beginDictionaryItem("V");
@ -1306,9 +1318,10 @@ PDFSecurityHandler::AuthorizationResult PDFStandardSecurityHandler::authenticate
if (U == m_U)
{
// We have authorized user access
m_authorizationData.authorizationResult = AuthorizationResult::UserAuthorized;
const AuthorizationResult authorizationResult = isNoDRM() ? AuthorizationResult::OwnerAuthorized : AuthorizationResult::UserAuthorized;
m_authorizationData.authorizationResult = authorizationResult;
m_authorizationData.fileEncryptionKey = fileEncryptionKey;
return AuthorizationResult::UserAuthorized;
return authorizationResult;
}
}
@ -1375,7 +1388,8 @@ PDFSecurityHandler::AuthorizationResult PDFStandardSecurityHandler::authenticate
AES_cbc_encrypt(convertByteArrayToUcharPtr(m_UE), convertByteArrayToUcharPtr(m_authorizationData.fileEncryptionKey), m_UE.size(), &key, aesInitializationVector, AES_DECRYPT);
// We have authorized user access
m_authorizationData.authorizationResult = AuthorizationResult::UserAuthorized;
const AuthorizationResult authorizationResult = isNoDRM() ? AuthorizationResult::OwnerAuthorized : AuthorizationResult::UserAuthorized;
m_authorizationData.authorizationResult = authorizationResult;
}
}
@ -2524,9 +2538,10 @@ PDFSecurityHandler::AuthorizationResult PDFPublicKeySecurityHandler::authenticat
m_permissions = qFromLittleEndian<uint32_t>(decryptedData.data() + 20);
}
const AuthorizationResult authorizationResult = isNoDRM() ? AuthorizationResult::OwnerAuthorized : AuthorizationResult::UserAuthorized;
m_authorizationData.fileEncryptionKey = digestBuffer.left(m_keyLength / 8);
m_authorizationData.authorizationResult = AuthorizationResult::UserAuthorized;
return AuthorizationResult::UserAuthorized;
m_authorizationData.authorizationResult = authorizationResult;
return authorizationResult;
}
}
}