cipher implementation

[quassel.git] / src / common / cipher.h

diff --git a/src/common/cipher.h b/src/common/cipher.h
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+/***************************************************************************
+ *   Copyright (C) 2005-09 by the Quassel Project                          *
+ *   devel@quassel-irc.org                                                 *
+ *                                                                         *
+ *   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 of the License, or     *
+ *   (at your option) version 3.                                           *
+ *                                                                         *
+ *   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, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+/*
+  Copyright (C) 1997 Robey Pointer <robeypointer@gmail.com>
+  Copyright (C) 2005 Ismail Donmez <ismail@kde.org>
+  Copyright (C) 2009 Travis McHenry <tmchenryaz@cox.net>
+  Copyright (C) 2009 Johannes Huber <johu@gmx.de>
+*/
+
+#ifndef CIPHER_H
+#define CIPHER_H
+
+#include<QtCrypto>
+
+class Cipher
+{
+  public:
+    Cipher();
+    explicit Cipher(QByteArray key, QString cipherType=QString("blowfish"));
+    ~Cipher();
+    QByteArray decrypt(QByteArray cipher);
+    QByteArray decryptTopic(QByteArray cipher);
+    bool encrypt(QByteArray& cipher);
+    QByteArray initKeyExchange();
+    QByteArray parseInitKeyX(QByteArray key);
+    bool parseFinishKeyX(QByteArray key);
+    bool setKey(QByteArray key);
+    QByteArray key() { return m_key; }
+    bool setType(const QString &type);
+    QString type() { return m_type; }
+    
+  private:
+    //direction is true for encrypt, false for decrypt
+    QByteArray blowfishCBC(QByteArray cipherText, bool direction);
+    QByteArray blowfishECB(QByteArray cipherText, bool direction);
+    QByteArray b64ToByte(QByteArray text);
+    QByteArray byteToB64(QByteArray text);
+
+    QCA::Initializer init;
+    QByteArray m_key;
+    QCA::DHPrivateKey m_tempKey;
+    QCA::BigInteger m_primeNum;
+    QString m_type;
+    bool m_cbc;
+};
+#endif // CIPHER_H
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