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/*
* Copyright (C) 2010 Felix Geyer <debfx@fobos.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 or (at your option)
* version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef KEEPASSX_SYMMETRICCIPHER_H
#define KEEPASSX_SYMMETRICCIPHER_H
#include <QByteArray>
#include <QScopedPointer>
#include <QString>
#include "crypto/SymmetricCipherBackend.h"
#include "format/KeePass2.h"
#include "core/Uuid.h"
class SymmetricCipher
{
public:
enum Algorithm
{
Aes128,
Aes256,
Twofish,
Salsa20,
ChaCha20,
InvalidAlgorithm = -1
};
enum Mode
{
Cbc,
Ctr,
Ecb,
Stream,
InvalidMode = -1
};
enum Direction
{
Decrypt,
Encrypt
};
SymmetricCipher(Algorithm algo, Mode mode, Direction direction);
~SymmetricCipher();
Q_DISABLE_COPY(SymmetricCipher)
bool init(const QByteArray& key, const QByteArray& iv);
bool isInitalized() const;
inline QByteArray process(const QByteArray& data, bool* ok)
{
return m_backend->process(data, ok);
}
Q_REQUIRED_RESULT inline bool processInPlace(QByteArray& data)
{
return m_backend->processInPlace(data);
}
Q_REQUIRED_RESULT inline bool processInPlace(QByteArray& data, quint64 rounds)
{
Q_ASSERT(rounds > 0);
return m_backend->processInPlace(data, rounds);
}
bool reset();
int keySize() const;
int blockSize() const;
QString errorString() const;
Algorithm algorithm() const;
static Algorithm cipherToAlgorithm(Uuid cipher);
static Uuid algorithmToCipher(Algorithm algo);
static int algorithmIvSize(Algorithm algo);
static Mode algorithmMode(Algorithm algo);
private:
static SymmetricCipherBackend* createBackend(Algorithm algo, Mode mode, Direction direction);
const QScopedPointer<SymmetricCipherBackend> m_backend;
bool m_initialized;
Algorithm m_algo;
};
#endif // KEEPASSX_SYMMETRICCIPHER_H
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