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63 lines
2.6 KiB
63 lines
2.6 KiB
/***************************************************************************
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* Copyright (C) 2005 by Tarek Saidi *
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* tarek@linux *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; version 2 of the License. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#ifndef _SECSTRING_H_
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#define _SECSTRING_H_
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#include <QByteArray>
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#include <QString>
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#include <QGlobalStatic>
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#include "crypto/arcfour.h"
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//! QString based class with in-memory encryption of its content.
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/*!
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This class can hold a QString object in an encrypted buffer. To get access to the string it is neccassary to unlock the SecString object.
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*/
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class SecString{
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public:
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SecString();
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~SecString();
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/*! Sets the content of the object.
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The SecString is locked after this operation.
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\param Source The string which should be set as content of the SecString.
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\param DelSrc Set this parameter TRUE if you want that SecString overwrites an deletes the source string.*/
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void setString(QString& Source, bool DelSrc=false);
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/*! Locks the string.
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That means that the unencrypted string will be overwritten and deleted and only the encrypted buffer remains.
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It is forbidden to call the function string() when the SecString is locked.*/
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void lock();
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void unlock();
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const QString& string();
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operator QString();
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int length();
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static void overwrite(unsigned char* str,int len);
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static void overwrite(QString& str);
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static void generateSessionKey();
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private:
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bool locked;
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static CArcFour RC4;
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QByteArray crypt;
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QString plain;
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};
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#endif
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