sha1.h

Last change: 2008-02-03 This is the source code of KCeasy。

/*
This file is part of KCeasy (http://www.kceasy.com)
Copyright (C) 2002-2004 Markus Kern <[e-mail]>

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.
*/
//---------------------------------------------------------------------------
#ifndef KSHA1H
#define KSHA1H
//---------------------------------------------------------------------------
#define KSHA_BLOCKSIZE		64
#define KSHA_DIGESTSIZE		20
//---------------------------------------------------------------------------

// the 'K' prefix is just to avoid collisions with stuff other people might
// have installed on their machines
class TKSHA1
{
public:
    TKSHA1();
    ~TKSHA1();

    void Update(const void *buf, unsigned int len);
    void Final(unsigned char *digest); // writes KSHA_DIGESTSIZE bytes to digest

    // hashes Length bytes of file File beginning at offset Start. If Length
    // is zero the hasing is done from Start to the end of the file.
    bool HashFile(const char *File, unsigned int Start = 0, unsigned int Length = 0);

private:
	unsigned long digest[5];           /* message digest */
	unsigned long count_lo, count_hi;  /* 64-bit bit count */
	unsigned char data[KSHA_BLOCKSIZE]; /* SHA data buffer */
	int           local;               /* unprocessed amount in data */

    void Transform();
};

//---------------------------------------------------------------------------

#endif