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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
**
** GNU Lesser General Public License Usage
**
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this file.
** Please review the following information to ensure the GNU Lesser General
** Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**************************************************************************/
#ifndef SSHABSTRACTCRYPTOFACILITY_P_H
#define SSHABSTRACTCRYPTOFACILITY_P_H
#include <botan/auto_rng.h>
#include <botan/symkey.h>
#include <QByteArray>
#include <QScopedPointer>
namespace Botan {
class BigInt;
class BlockCipher;
class BlockCipherMode;
class BlockCipherModePaddingMethod;
class HashFunction;
class HMAC;
class Pipe;
class PK_Signing_Key;
}
namespace QSsh {
namespace Internal {
class SshKeyExchange;
class SshAbstractCryptoFacility
{
public:
virtual ~SshAbstractCryptoFacility();
void clearKeys();
void recreateKeys(const SshKeyExchange &kex);
QByteArray generateMac(const QByteArray &data, quint32 dataSize) const;
quint32 cipherBlockSize() const { return m_cipherBlockSize; }
quint32 macLength() const { return m_macLength; }
protected:
SshAbstractCryptoFacility();
void convert(QByteArray &data, quint32 offset, quint32 dataSize) const;
QByteArray sessionId() const { return m_sessionId; }
private:
SshAbstractCryptoFacility(const SshAbstractCryptoFacility &);
SshAbstractCryptoFacility &operator=(const SshAbstractCryptoFacility &);
virtual QByteArray cryptAlgoName(const SshKeyExchange &kex) const = 0;
virtual QByteArray hMacAlgoName(const SshKeyExchange &kex) const = 0;
virtual Botan::BlockCipherMode *makeCipherMode(Botan::BlockCipher *cipher,
Botan::BlockCipherModePaddingMethod *paddingMethod,
const Botan::InitializationVector &iv,
const Botan::SymmetricKey &key) = 0;
virtual char ivChar() const = 0;
virtual char keyChar() const = 0;
virtual char macChar() const = 0;
QByteArray generateHash(const SshKeyExchange &kex, char c, quint32 length);
void checkInvariant() const;
QByteArray m_sessionId;
QScopedPointer<Botan::Pipe> m_pipe;
QScopedPointer<Botan::HMAC> m_hMac;
quint32 m_cipherBlockSize;
quint32 m_macLength;
};
class SshEncryptionFacility : public SshAbstractCryptoFacility
{
public:
void encrypt(QByteArray &data) const;
void createAuthenticationKey(const QByteArray &privKeyFileContents);
QByteArray authenticationAlgorithmName() const;
QByteArray authenticationPublicKey() const { return m_authPubKeyBlob; }
QByteArray authenticationKeySignature(const QByteArray &data) const;
QByteArray getRandomNumbers(int count) const;
~SshEncryptionFacility();
private:
virtual QByteArray cryptAlgoName(const SshKeyExchange &kex) const;
virtual QByteArray hMacAlgoName(const SshKeyExchange &kex) const;
virtual Botan::BlockCipherMode *makeCipherMode(Botan::BlockCipher *cipher,
Botan::BlockCipherModePaddingMethod *paddingMethod,
const Botan::InitializationVector &iv, const Botan::SymmetricKey &key);
virtual char ivChar() const { return 'A'; }
virtual char keyChar() const { return 'C'; }
virtual char macChar() const { return 'E'; }
bool createAuthenticationKeyFromPKCS8(const QByteArray &privKeyFileContents,
QList<Botan::BigInt> &pubKeyParams, QList<Botan::BigInt> &allKeyParams, QString &error);
bool createAuthenticationKeyFromOpenSSL(const QByteArray &privKeyFileContents,
QList<Botan::BigInt> &pubKeyParams, QList<Botan::BigInt> &allKeyParams, QString &error);
static const QByteArray PrivKeyFileStartLineRsa;
static const QByteArray PrivKeyFileStartLineDsa;
static const QByteArray PrivKeyFileEndLineRsa;
static const QByteArray PrivKeyFileEndLineDsa;
QByteArray m_authKeyAlgoName;
QByteArray m_authPubKeyBlob;
QByteArray m_cachedPrivKeyContents;
QScopedPointer<Botan::PK_Signing_Key> m_authKey;
mutable Botan::AutoSeeded_RNG m_rng;
};
class SshDecryptionFacility : public SshAbstractCryptoFacility
{
public:
void decrypt(QByteArray &data, quint32 offset, quint32 dataSize) const;
private:
virtual QByteArray cryptAlgoName(const SshKeyExchange &kex) const;
virtual QByteArray hMacAlgoName(const SshKeyExchange &kex) const;
virtual Botan::BlockCipherMode *makeCipherMode(Botan::BlockCipher *cipher,
Botan::BlockCipherModePaddingMethod *paddingMethod,
const Botan::InitializationVector &iv, const Botan::SymmetricKey &key);
virtual char ivChar() const { return 'B'; }
virtual char keyChar() const { return 'D'; }
virtual char macChar() const { return 'F'; }
};
} // namespace Internal
} // namespace QSsh
#endif // SSHABSTRACTCRYPTOFACILITY_P_H
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