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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
*/
#pragma once
#include <rtl/cipher.h>
#include <rtl/ustring.hxx>
#include <vector>
#include <pdf/IPDFEncryptor.hxx>
namespace com::sun::star::uno
{
template <typename> class Reference;
}
namespace vcl::pdf
{
class EncryptionHashTransporter;
class PDFEncryptor : public IPDFEncryptor
{
private:
/* the numerical value of the access permissions, according to PDF spec, must be signed */
sal_Int32 m_nAccessPermissions = 0;
/* The encryption key, formed with the user password according to algorithm 3.2,
* maximum length is 16 bytes + 3 + 2 for 128 bit security */
sal_Int32 m_nKeyLength = 0; // key length, 16 or 5
sal_Int32 m_nRC4KeyLength = 0; // key length, 16 or 10, to be input to the algorithm 3.1
/* used to cipher the stream data and for password management */
rtlCipher m_aCipher = nullptr;
public:
PDFEncryptor();
~PDFEncryptor();
sal_Int32 getVersion() override { return 2; };
sal_Int32 getRevision() override { return 3; };
sal_Int32 getAccessPermissions() override { return m_nAccessPermissions; }
sal_Int32 getKeyLength() override { return m_nKeyLength; }
sal_Int32 getRC4KeyLength() { return m_nRC4KeyLength; }
static void initEncryption(EncryptionHashTransporter& rEncryptionHashTransporter,
const OUString& i_rOwnerPassword, const OUString& i_rUserPassword);
bool prepareEncryption(
const css::uno::Reference<css::beans::XMaterialHolder>& xEncryptionMaterialHolder,
PDFEncryptionProperties& rProperties) override;
void setupKeysAndCheck(PDFEncryptionProperties& rProperties) override;
void setupEncryption(std::vector<sal_uInt8>& rEncryptionKey, sal_Int32 nObject) override;
void encrypt(const void* pInput, sal_uInt64 nInputSize, std::vector<sal_uInt8>& rOutput,
sal_uInt64 nOutputSize) override;
};
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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