/*
 * Copyright (C) 2007-2023 Xagasoft, All rights reserved.
 *
 * This file is part of the libbu++ library and is released under the
 * terms of the license contained in the file LICENSE.
 */

#ifndef BU_MD5_H
#define BU_MD5_H

#include "bu/cryptohash.h"

namespace Bu
{
    /**
     * Class for easily calculating MD5 sums of just about any data.
     * This code is based on some public domain code written by Colin Plumb in
     * 1993.
     *@author Mike Buland
     */
    class Md5 : public Bu::CryptoHash
    {
    public:
        /** Build an MD5 sum builder. */
        Md5();

        /** Deconstruct */
        virtual ~Md5();

        virtual void reset();
        virtual void setSalt( const Bu::String &sSalt );
        virtual void addData( const void *sData, int iSize );
        using Bu::CryptoHash::addData;
        virtual String getResult();
        virtual void writeResult( Bu::Stream &sOut );

    private:
        /**
         * Compute one block of input data.
         */
        void compBlock( uint32_t *lsum, uint32_t *x );
        void compCap( uint32_t *sumout );

        void _addData( uint8_t *target, int &iCurFill, const void *sData,
                int iSize );
        void _toLittleEndian( uint8_t *buf, uint32_t count );
        
        uint8_t inbuf[64];
        uint32_t sum[4];
        uint32_t uBits[2];
    };
};

#endif
