/*
 *  Baltisot
 *  Copyright (C) 1999-2007 Nicolas "Pixel" Noble
 *
 *  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) any later version.
 *
 *  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
 */

/* $Id: HashFunction.h,v 1.1 2007-09-05 14:11:54 pixel Exp $ */

#ifndef __HASHFUNCTION_H__
#define __HASHFUNCTION_H__

#include <Exceptions.h>

class HashFunction : public Base {
  public:
      HashFunction();
    void Update(const String &);
    void Update(const unsigned char * data, size_t len);
    String Finish();
    size_t RFinish(Uint8 * digest);
  protected:
    size_t finish();
    virtual void update(const unsigned char * data, size_t len) = 0;
    virtual size_t finish(Uint8 * digest) = 0;
    Uint8 digest[256];
    size_t l;
  private:
    bool finished;
};

class SHA1 : public HashFunction {
  public:
      SHA1();
      virtual ~SHA1();
    size_t size();
  protected:
    virtual void update(const unsigned char * data, size_t len);
    virtual size_t finish(Uint8 * digest);
  private:
    void * opaque;
};

class SHA256 : public HashFunction {
  public:
      SHA256();
      virtual ~SHA256();
    size_t size();
  protected:
    virtual void update(const unsigned char * data, size_t len);
    virtual size_t finish(Uint8 * digest);
  private:
    void * opaque;
};

class MD5 : public HashFunction {
  public:
      MD5();
      virtual ~MD5();
    size_t size();
  protected:
    virtual void update(const unsigned char * data, size_t len);
    virtual size_t finish(Uint8 * digest);
  private:
    void * opaque;
};

#endif