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/* port/ti/ti-des.c
*
* Copyright (C) 2006-2015 wolfSSL Inc.
*
* This file is part of wolfSSL. (formerly known as CyaSSL)
*
* wolfSSL 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.
*
* wolfSSL 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
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <wolfssl/wolfcrypt/settings.h>
#ifndef NO_DES
#if defined(WOLFSSL_TI_CRYPT)
#include <stdbool.h>
#include <stdint.h>
#include <wolfssl/wolfcrypt/des3.h>
#include <wolfssl/wolfcrypt/error-crypt.h>
#include <wolfssl/wolfcrypt/port/ti/ti-ccm.h>
#include "inc/hw_des.h"
#include "inc/hw_memmap.h"
#include "inc/hw_ints.h"
#include "driverlib/des.h"
#include "driverlib/sysctl.h"
#include "driverlib/rom_map.h"
#include "driverlib/rom.h"
static int DesSetIV(Des* des, const byte* iv, int tri)
{
if (des == NULL)
return BAD_FUNC_ARG;
if (iv)
XMEMCPY(des->reg, iv, tri == DES_CFG_TRIPLE ? DES3_IVLEN : DES_IVLEN);
else
XMEMSET(des->reg, 0, tri == DES_CFG_TRIPLE ? DES3_IVLEN : DES_IVLEN);
return 0;
}
static int DesSetKey(Des* des, const byte* key, const byte* iv,int dir, int tri)
{
if(!wolfSSL_TI_CCMInit())return 1 ;
if ((des == NULL) || (key == NULL) || (iv == NULL))
return BAD_FUNC_ARG;
if(!((dir == DES_ENCRYPTION) || (dir == DES_DECRYPTION)))
return BAD_FUNC_ARG;
XMEMCPY(des->key, key, tri == DES_CFG_SINGLE ? DES_KEYLEN : DES3_KEYLEN) ;
return DesSetIV(des, iv, tri);
}
static int DesCbcAlign16(Des* des, byte* out, const byte* in, word32 sz, word32 dir, word32 tri)
{
wolfSSL_TI_lockCCM() ;
ROM_DESReset(DES_BASE);
ROM_DESConfigSet(DES_BASE, (dir | DES_CFG_MODE_CBC | tri));
ROM_DESIVSet(DES_BASE, des->reg);
ROM_DESKeySet(DES_BASE, des->key);
if(dir == DES_CFG_DIR_DECRYPT)
/* if input and output same will overwrite input iv */
XMEMCPY(des->tmp, in + sz - DES_BLOCK_SIZE, DES_BLOCK_SIZE);
ROM_DESDataProcess(DES_BASE, (uint32_t *)in, (uint32_t *)out, sz);
wolfSSL_TI_unlockCCM() ;
/* store iv for next call */
if(dir == DES_CFG_DIR_ENCRYPT)
XMEMCPY(des->reg, out + sz - DES_BLOCK_SIZE, DES_BLOCK_SIZE);
else
XMEMCPY(des->reg, des->tmp, DES_BLOCK_SIZE);
return 0 ;
}
#define IS_ALIGN16(p) (((unsigned int)(p)&0xf) == 0)
static int DesCbc(Des* des, byte* out, const byte* in, word32 sz, word32 dir, word32 tri)
{
const byte * in_p ; byte * out_p ;
word32 size ;
#define TI_BUFFSIZE 1024
byte buff[TI_BUFFSIZE] ;
if ((des == NULL) || (in == NULL) || (out == NULL))
return BAD_FUNC_ARG;
if(sz % DES_BLOCK_SIZE)
return BAD_FUNC_ARG;
while(sz > 0) {
size = sz ; in_p = in ; out_p = out ;
if(!IS_ALIGN16(in)){
size = sz>TI_BUFFSIZE ? TI_BUFFSIZE : sz ;
XMEMCPY(buff, in, size) ;
in_p = (const byte *)buff ;
}
if(!IS_ALIGN16(out)){
size = sz>TI_BUFFSIZE ? TI_BUFFSIZE : sz ;
out_p = (byte *)buff ;
}
DesCbcAlign16(des, out_p, in_p, size, dir, tri) ;
if(!IS_ALIGN16(out)){
XMEMCPY(out, buff, size) ;
}
sz -= size ; in += size ; out += size ;
}
return 0 ;
}
WOLFSSL_API int wc_Des_SetKey(Des* des, const byte* key, const byte* iv,int dir)
{
return DesSetKey(des, key, iv, dir, DES_CFG_SINGLE) ;
}
WOLFSSL_API void wc_Des_SetIV(Des* des, const byte* iv)
{
DesSetIV(des, iv, DES_CFG_SINGLE) ;
}
WOLFSSL_API int wc_Des3_SetKey(Des3* des, const byte* key, const byte* iv,int dir)
{
return DesSetKey((Des *)des, key, iv, dir, DES_CFG_TRIPLE) ;
}
WOLFSSL_API int wc_Des3_SetIV(Des3* des, const byte* iv)
{
return DesSetIV((Des *)des, iv, DES_CFG_TRIPLE) ;
}
WOLFSSL_API int wc_Des_CbcEncrypt(Des* des, byte* out, const byte* in, word32 sz)
{
return DesCbc(des, out, in, sz, DES_CFG_DIR_ENCRYPT, DES_CFG_SINGLE) ;
}
WOLFSSL_API int wc_Des_CbcDecrypt(Des* des, byte* out, const byte* in, word32 sz)
{
return DesCbc(des, out, in, sz, DES_CFG_DIR_DECRYPT, DES_CFG_SINGLE) ;
}
WOLFSSL_API int wc_Des_CbcDecryptWithKey(byte* out, const byte* in, word32 sz,
const byte* key, const byte* iv)
{ return 0 ;}
WOLFSSL_API int wc_Des3_CbcEncrypt(Des3* des, byte* out, const byte* in, word32 sz)
{
return DesCbc((Des *)des, out, in, sz, DES_CFG_DIR_ENCRYPT, DES_CFG_TRIPLE) ;
}
WOLFSSL_API int wc_Des3_CbcDecrypt(Des3* des, byte* out, const byte* in, word32 sz)
{
return DesCbc((Des *)des, out, in, sz, DES_CFG_DIR_DECRYPT, DES_CFG_TRIPLE) ;
}
WOLFSSL_API int wc_Des3_CbcDecryptWithKey(byte* out, const byte* in, word32 sz,
const byte* key, const byte* iv)
{ return 0 ; }
#endif /* WOLFSSL_TI_CRYPT */
#endif /* NO_DES */
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