198 lines
5.7 KiB
C
198 lines
5.7 KiB
C
/*
|
|
* VIA PadLock support functions
|
|
*
|
|
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
|
|
* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
|
|
*
|
|
* This file is provided under the Apache License 2.0, or the
|
|
* GNU General Public License v2.0 or later.
|
|
*
|
|
* **********
|
|
* Apache License 2.0:
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
* not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
* **********
|
|
*
|
|
* **********
|
|
* GNU General Public License v2.0 or later:
|
|
*
|
|
* 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.
|
|
*
|
|
* **********
|
|
*
|
|
* This file is part of mbed TLS (https://tls.mbed.org)
|
|
*/
|
|
/*
|
|
* This implementation is based on the VIA PadLock Programming Guide:
|
|
*
|
|
* http://www.via.com.tw/en/downloads/whitepapers/initiatives/padlock/
|
|
* programming_guide.pdf
|
|
*/
|
|
|
|
#if !defined(MBEDTLS_CONFIG_FILE)
|
|
#include "mbedtls/config.h"
|
|
#else
|
|
#include MBEDTLS_CONFIG_FILE
|
|
#endif
|
|
|
|
#if defined(MBEDTLS_PADLOCK_C)
|
|
|
|
#include "mbedtls/padlock.h"
|
|
|
|
#include <string.h>
|
|
|
|
#ifndef asm
|
|
#define asm __asm
|
|
#endif
|
|
|
|
#if defined(MBEDTLS_HAVE_X86)
|
|
|
|
/*
|
|
* PadLock detection routine
|
|
*/
|
|
int mbedtls_padlock_has_support( int feature )
|
|
{
|
|
static int flags = -1;
|
|
int ebx = 0, edx = 0;
|
|
|
|
if( flags == -1 )
|
|
{
|
|
asm( "movl %%ebx, %0 \n\t"
|
|
"movl $0xC0000000, %%eax \n\t"
|
|
"cpuid \n\t"
|
|
"cmpl $0xC0000001, %%eax \n\t"
|
|
"movl $0, %%edx \n\t"
|
|
"jb unsupported \n\t"
|
|
"movl $0xC0000001, %%eax \n\t"
|
|
"cpuid \n\t"
|
|
"unsupported: \n\t"
|
|
"movl %%edx, %1 \n\t"
|
|
"movl %2, %%ebx \n\t"
|
|
: "=m" (ebx), "=m" (edx)
|
|
: "m" (ebx)
|
|
: "eax", "ecx", "edx" );
|
|
|
|
flags = edx;
|
|
}
|
|
|
|
return( flags & feature );
|
|
}
|
|
|
|
/*
|
|
* PadLock AES-ECB block en(de)cryption
|
|
*/
|
|
int mbedtls_padlock_xcryptecb( mbedtls_aes_context *ctx,
|
|
int mode,
|
|
const unsigned char input[16],
|
|
unsigned char output[16] )
|
|
{
|
|
int ebx = 0;
|
|
uint32_t *rk;
|
|
uint32_t *blk;
|
|
uint32_t *ctrl;
|
|
unsigned char buf[256];
|
|
|
|
rk = ctx->rk;
|
|
blk = MBEDTLS_PADLOCK_ALIGN16( buf );
|
|
memcpy( blk, input, 16 );
|
|
|
|
ctrl = blk + 4;
|
|
*ctrl = 0x80 | ctx->nr | ( ( ctx->nr + ( mode^1 ) - 10 ) << 9 );
|
|
|
|
asm( "pushfl \n\t"
|
|
"popfl \n\t"
|
|
"movl %%ebx, %0 \n\t"
|
|
"movl $1, %%ecx \n\t"
|
|
"movl %2, %%edx \n\t"
|
|
"movl %3, %%ebx \n\t"
|
|
"movl %4, %%esi \n\t"
|
|
"movl %4, %%edi \n\t"
|
|
".byte 0xf3,0x0f,0xa7,0xc8 \n\t"
|
|
"movl %1, %%ebx \n\t"
|
|
: "=m" (ebx)
|
|
: "m" (ebx), "m" (ctrl), "m" (rk), "m" (blk)
|
|
: "memory", "ecx", "edx", "esi", "edi" );
|
|
|
|
memcpy( output, blk, 16 );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/*
|
|
* PadLock AES-CBC buffer en(de)cryption
|
|
*/
|
|
int mbedtls_padlock_xcryptcbc( mbedtls_aes_context *ctx,
|
|
int mode,
|
|
size_t length,
|
|
unsigned char iv[16],
|
|
const unsigned char *input,
|
|
unsigned char *output )
|
|
{
|
|
int ebx = 0;
|
|
size_t count;
|
|
uint32_t *rk;
|
|
uint32_t *iw;
|
|
uint32_t *ctrl;
|
|
unsigned char buf[256];
|
|
|
|
if( ( (long) input & 15 ) != 0 ||
|
|
( (long) output & 15 ) != 0 )
|
|
return( MBEDTLS_ERR_PADLOCK_DATA_MISALIGNED );
|
|
|
|
rk = ctx->rk;
|
|
iw = MBEDTLS_PADLOCK_ALIGN16( buf );
|
|
memcpy( iw, iv, 16 );
|
|
|
|
ctrl = iw + 4;
|
|
*ctrl = 0x80 | ctx->nr | ( ( ctx->nr + ( mode ^ 1 ) - 10 ) << 9 );
|
|
|
|
count = ( length + 15 ) >> 4;
|
|
|
|
asm( "pushfl \n\t"
|
|
"popfl \n\t"
|
|
"movl %%ebx, %0 \n\t"
|
|
"movl %2, %%ecx \n\t"
|
|
"movl %3, %%edx \n\t"
|
|
"movl %4, %%ebx \n\t"
|
|
"movl %5, %%esi \n\t"
|
|
"movl %6, %%edi \n\t"
|
|
"movl %7, %%eax \n\t"
|
|
".byte 0xf3,0x0f,0xa7,0xd0 \n\t"
|
|
"movl %1, %%ebx \n\t"
|
|
: "=m" (ebx)
|
|
: "m" (ebx), "m" (count), "m" (ctrl),
|
|
"m" (rk), "m" (input), "m" (output), "m" (iw)
|
|
: "memory", "eax", "ecx", "edx", "esi", "edi" );
|
|
|
|
memcpy( iv, iw, 16 );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
#endif /* MBEDTLS_HAVE_X86 */
|
|
|
|
#endif /* MBEDTLS_PADLOCK_C */
|