JUCE/modules/juce_cryptography/encryption/juce_BlowFish.h

/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2015 - ROLI Ltd.

   Permission is granted to use this software under the terms of either:
   a) the GPL v2 (or any later version)
   b) the Affero GPL v3

   Details of these licenses can be found at: www.gnu.org/licenses

   JUCE 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.

   ------------------------------------------------------------------------------

   To release a closed-source product which uses JUCE, commercial licenses are
   available: visit www.juce.com for more information.

  ==============================================================================
*/

#ifndef JUCE_BLOWFISH_H_INCLUDED
#define JUCE_BLOWFISH_H_INCLUDED


//==============================================================================
/**
    BlowFish encryption class.

*/
class JUCE_API  BlowFish
{
public:
    //==============================================================================
    /** Creates an object that can encode/decode based on the specified key.

        The key data can be up to 72 bytes long.
    */
    BlowFish (const void* keyData, int keyBytes);

    /** Creates a copy of another blowfish object. */
    BlowFish (const BlowFish&);

    /** Copies another blowfish object. */
    BlowFish& operator= (const BlowFish&) noexcept;

    /** Destructor. */
    ~BlowFish() noexcept;

    //==============================================================================
    /** Encrypts a pair of 32-bit integers. */
    void encrypt (uint32& data1, uint32& data2) const noexcept;

    /** Decrypts a pair of 32-bit integers. */
    void decrypt (uint32& data1, uint32& data2) const noexcept;


private:
    //==============================================================================
    uint32 p[18];
    HeapBlock <uint32> s[4];

    uint32 F (uint32) const noexcept;

    JUCE_LEAK_DETECTOR (BlowFish)
};


#endif   // JUCE_BLOWFISH_H_INCLUDED