/****************************************************************************/
/*	Copyright (c) 2009, Bendor Research Pty. Ltd. All rights reserved.		*/
/*	This software is released under the GNU General Public License, version	*/
/*	3, with the exemptions that 1) the header files installed by this 	 	*/
/*	package can be included in closed-source code and 2) the libraries		*/
/*	built by this package can be statically linked into a closed-source 	*/
/*	binary. See the file LICENSE for the details.							*/
/*	This software is provided "AS IS", without any warranty or guarantee.	*/
/*	By using this software you acknowledge that neither Bendor Research nor	*/
/*	any of its personnel or affiliates can be held liable for any damages,	*/
/*	including, but not limited to, loss of business, loss of money, loss of */
/*	life, loss or reputation, arising out of this software being faulty or	*/
/*	not performing as advertised, even if Bendor Research was aware of such	*/
/*	faults in the software. You use this software at your own risk, any and */
/*	all liabilities that arise out of your using this software are strictly	*/
/*	yours.																	*/
/****************************************************************************/

#include <crypto/cipher.h>
#include <crypto.h>

/****************************************************************************/
/*						Local prototypes									*/
/****************************************************************************/

static void	_bc_OfbXxcrypt( const BLKCIP block, const void *iptr, void *optr );

/****************************************************************************/
/*						Public data											*/
/****************************************************************************/

const struct bc_cblock _bc_block_ofb = {

	_bc_OfbXxcrypt,
	_bc_OfbXxcrypt
};

/****************************************************************************/
/*						Local functions										*/
/****************************************************************************/

static void	_bc_OfbXxcrypt( const BLKCIP block, const void *iptr, void *optr )
{
unsigned char	*iv;
unsigned char	*ip;
unsigned char	*op;
unsigned int	ct;

	(*block->cipher->en)( block->ksched, block->vector, block->vector );
	ct = block->cipher->bl+1;
	iv = (unsigned char *) block->vector;
	ip = (unsigned char *) iptr;
	op = (unsigned char *) optr;
	while ( --ct ) *op++ = *ip++ ^ *iv++;
}

