864d74c6a5
* harbour/src/rtl/Makefile
+ harbour/src/rtl/hbbfish.c
* harbour/include/Makefile
+ harbour/include/hbbfish.h
+ added support for BlowFish encryption at C level:
hb_blowfishInit(), hb_blowfishEncrypt(), hb_blowfishDecrypt()
This code implements BlowFish algorithm designed by Bruce Schneier.
The description of BlowFish algorithm can be found at:
http://www.schneier.com/paper-blowfish-fse.html
This code uses for initial s-boxes and p-array values PI hex digits
taken from tables public at:
http://www.schneier.com/blowfish.html
which can be downloaded from:
http://www.schneier.com/code/constants.txt
This should be quite fast implementation (probably much faster
then reference one) but please remember that in BlowFish algorithm
startup initialization of encryption tables is intentionally
designed to be expensive to strongly reduce the efficiency of
brute force attacks so call hb_blowfishInit() once for each
new password and then reuse initialized encryption tables in
hb_blowfishEncrypt() and hb_blowfishDecrypt().
I'll add .prg functions later.
TODO: add some asymmetric key encryption.
87 lines
3.2 KiB
C
87 lines
3.2 KiB
C
/*
|
|
* $Id$
|
|
*/
|
|
|
|
/*
|
|
* Harbour Project source code:
|
|
* This code implements BlowFish algorithm designed by Bruce Schneier.
|
|
* The description of BlowFish algorithm can be found at:
|
|
* http://www.schneier.com/paper-blowfish-fse.html
|
|
* This code uses for initial s-boxes and p-array values PI hex digits
|
|
* taken from tables public at:
|
|
* http://www.schneier.com/blowfish.html
|
|
* which can be downloaded from:
|
|
* http://www.schneier.com/code/constants.txt
|
|
*
|
|
* Copyright 2009 Przemyslaw Czerpak <druzus / at / priv.onet.pl>
|
|
* www - http://www.harbour-project.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, 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 software; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
|
|
* Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
|
|
*
|
|
* As a special exception, the Harbour Project gives permission for
|
|
* additional uses of the text contained in its release of Harbour.
|
|
*
|
|
* The exception is that, if you link the Harbour libraries with other
|
|
* files to produce an executable, this does not by itself cause the
|
|
* resulting executable to be covered by the GNU General Public License.
|
|
* Your use of that executable is in no way restricted on account of
|
|
* linking the Harbour library code into it.
|
|
*
|
|
* This exception does not however invalidate any other reasons why
|
|
* the executable file might be covered by the GNU General Public License.
|
|
*
|
|
* This exception applies only to the code released by the Harbour
|
|
* Project under the name Harbour. If you copy code from other
|
|
* Harbour Project or Free Software Foundation releases into a copy of
|
|
* Harbour, as the General Public License permits, the exception does
|
|
* not apply to the code that you add in this way. To avoid misleading
|
|
* anyone as to the status of such modified files, you must delete
|
|
* this exception notice from them.
|
|
*
|
|
* If you write modifications of your own for Harbour, it is your choice
|
|
* whether to permit this exception to apply to your modifications.
|
|
* If you do not wish that, delete this exception notice.
|
|
*
|
|
*/
|
|
|
|
#ifndef HB_BLOWFISH_H_
|
|
#define HB_BLOWFISH_H_
|
|
|
|
#include "hbdefs.h"
|
|
|
|
HB_EXTERN_BEGIN
|
|
|
|
#define SUBKEYS_COUNT 18
|
|
#define SBOX_ENTRIES 256
|
|
|
|
typedef struct
|
|
{
|
|
UINT32 P[ SUBKEYS_COUNT ];
|
|
UINT32 S1[ SBOX_ENTRIES ];
|
|
UINT32 S2[ SBOX_ENTRIES ];
|
|
UINT32 S3[ SBOX_ENTRIES ];
|
|
UINT32 S4[ SBOX_ENTRIES ];
|
|
}
|
|
HB_BLOWFISH;
|
|
|
|
extern HB_EXPORT void hb_blowfishInit( HB_BLOWFISH * bf, const void * keydata, int keylen );
|
|
extern HB_EXPORT void hb_blowfishEncrypt( const HB_BLOWFISH * bf, UINT32 * xl, UINT32 * xr );
|
|
extern HB_EXPORT void hb_blowfishDecrypt( const HB_BLOWFISH * bf, UINT32 * xl, UINT32 * xr );
|
|
|
|
HB_EXTERN_END
|
|
|
|
#endif /* HB_BLOWFISH_H_ */
|