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/**
* \file padlock.h
*
* \brief VIA PadLock ACE for HW encryption/decryption supported by some processors
*
* Copyright (C) 2006-2010, Brainspark B.V.
*
* This file is part of PolarSSL (http://www.polarssl.org)
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
*
* All rights reserved.
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef POLARSSL_PADLOCK_H
#define POLARSSL_PADLOCK_H
#include "polarssl/aes.h"
#define POLARSSL_ERR_PADLOCK_DATA_MISALIGNED -0x0030 /**< Input data should be aligned. */
#if defined(POLARSSL_HAVE_ASM) && defined(__GNUC__) && defined(__i386__)
#ifndef POLARSSL_HAVE_X86
#define POLARSSL_HAVE_X86
#endif
#define PADLOCK_RNG 0x000C
#define PADLOCK_ACE 0x00C0
#define PADLOCK_PHE 0x0C00
#define PADLOCK_PMM 0x3000
#define PADLOCK_ALIGN16(x) (unsigned long *) (16 + ((long) x & ~15))
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief PadLock detection routine
*
* \param The feature to detect
*
* \return 1 if CPU has support for the feature, 0 otherwise
*/
int padlock_supports( int feature );
/**
* \brief PadLock AES-ECB block en(de)cryption
*
* \param ctx AES context
* \param mode AES_ENCRYPT or AES_DECRYPT
* \param input 16-byte input block
* \param output 16-byte output block
*
* \return 0 if success, 1 if operation failed
*/
int padlock_xcryptecb( aes_context *ctx,
int mode,
const unsigned char input[16],
unsigned char output[16] );
/**
* \brief PadLock AES-CBC buffer en(de)cryption
*
* \param ctx AES context
* \param mode AES_ENCRYPT or AES_DECRYPT
* \param length length of the input data
* \param iv initialization vector (updated after use)
* \param input buffer holding the input data
* \param output buffer holding the output data
*
* \return 0 if success, 1 if operation failed
*/
int padlock_xcryptcbc( aes_context *ctx,
int mode,
size_t length,
unsigned char iv[16],
const unsigned char *input,
unsigned char *output );
#ifdef __cplusplus
}
#endif
#endif /* HAVE_X86 */
#endif /* padlock.h */
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