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// SPDX-FileCopyrightText: 2022 Linus Jahn <lnj@kaidan.im>
//
// SPDX-License-Identifier: LGPL-2.1-or-later
#ifndef QXMPPFILEENCRYPTION_H
#define QXMPPFILEENCRYPTION_H
#include "QXmppGlobal.h"
#include <memory>
#include <QIODevice>
namespace QCA {
class Cipher;
class Initializer;
} // namespace QCA
namespace QXmpp::Private::Encryption {
enum Direction {
Encode,
Decode,
};
QXMPP_EXPORT QByteArray process(const QByteArray &data, Cipher cipherConfig, Direction direction, const QByteArray &key, const QByteArray &iv);
QXMPP_EXPORT QByteArray generateKey(Cipher cipher);
QXMPP_EXPORT QByteArray generateInitializationVector(Cipher);
// export for tests
class QXMPP_EXPORT EncryptionDevice : public QIODevice
{
public:
EncryptionDevice(std::unique_ptr<QIODevice> input, Cipher config, const QByteArray &key, const QByteArray &iv);
~EncryptionDevice() override;
bool open(QIODevice::OpenMode mode) override;
void close() override;
bool isSequential() const override;
qint64 size() const override;
qint64 readData(char *data, qint64 maxlen) override;
qint64 writeData(const char *data, qint64 len) override;
bool atEnd() const override;
private:
Cipher m_cipherConfig;
bool m_finalized = false;
std::vector<char> m_outputBuffer;
std::unique_ptr<QIODevice> m_input;
std::unique_ptr<QCA::Cipher> m_cipher;
};
class QXMPP_EXPORT DecryptionDevice : public QIODevice
{
public:
DecryptionDevice(std::unique_ptr<QIODevice> output, Cipher config, const QByteArray &key, const QByteArray &iv);
~DecryptionDevice() override;
bool open(QIODevice::OpenMode mode) override;
void close() override;
bool isSequential() const override;
qint64 size() const override;
qint64 readData(char *data, qint64 maxlen) override;
qint64 writeData(const char *data, qint64 len) override;
private:
Cipher m_cipherConfig;
std::vector<char> m_outputBuffer;
std::unique_ptr<QIODevice> m_output;
std::unique_ptr<QCA::Cipher> m_cipher;
};
} // namespace QXmpp::Private::Encryption
#endif // QXMPPFILEENCRYPTION_H
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