mirror of
https://github.com/Mbed-TLS/mbedtls.git
synced 2025-10-30 10:45:34 +03:00
162 lines
4.4 KiB
C
162 lines
4.4 KiB
C
/*
|
|
* VIA PadLock support functions
|
|
*
|
|
* Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
|
|
*
|
|
* Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot 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 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 implementation is based on the VIA PadLock Programming Guide:
|
|
*
|
|
* http://www.via.com.tw/en/downloads/whitepapers/initiatives/padlock/
|
|
* programming_guide.pdf
|
|
*/
|
|
|
|
#include "polarssl/config.h"
|
|
|
|
#if defined(POLARSSL_PADLOCK_C)
|
|
|
|
#include "polarssl/aes.h"
|
|
#include "polarssl/padlock.h"
|
|
|
|
#if defined(POLARSSL_HAVE_X86)
|
|
|
|
#include <string.h>
|
|
|
|
/*
|
|
* PadLock detection routine
|
|
*/
|
|
int padlock_supports( int feature )
|
|
{
|
|
static int flags = -1;
|
|
int ebx, edx;
|
|
|
|
if( flags == -1 )
|
|
{
|
|
asm( "movl %%ebx, %0 \n" \
|
|
"movl $0xC0000000, %%eax \n" \
|
|
"cpuid \n" \
|
|
"cmpl $0xC0000001, %%eax \n" \
|
|
"movl $0, %%edx \n" \
|
|
"jb unsupported \n" \
|
|
"movl $0xC0000001, %%eax \n" \
|
|
"cpuid \n" \
|
|
"unsupported: \n" \
|
|
"movl %%edx, %1 \n" \
|
|
"movl %2, %%ebx \n"
|
|
: "=m" (ebx), "=m" (edx)
|
|
: "m" (ebx)
|
|
: "eax", "ecx", "edx" );
|
|
|
|
flags = edx;
|
|
}
|
|
|
|
return( flags & feature );
|
|
}
|
|
|
|
/*
|
|
* PadLock AES-ECB block en(de)cryption
|
|
*/
|
|
int padlock_xcryptecb( aes_context *ctx,
|
|
int mode,
|
|
unsigned char input[16],
|
|
unsigned char output[16] )
|
|
{
|
|
int ebx;
|
|
unsigned long *rk;
|
|
unsigned long *blk;
|
|
unsigned long *ctrl;
|
|
unsigned char buf[256];
|
|
|
|
rk = ctx->rk;
|
|
blk = PADLOCK_ALIGN16( buf );
|
|
memcpy( blk, input, 16 );
|
|
|
|
ctrl = blk + 4;
|
|
*ctrl = 0x80 | ctx->nr | ( ( ctx->nr + ( mode^1 ) - 10 ) << 9 );
|
|
|
|
asm( "pushfl; popfl \n" \
|
|
"movl %%ebx, %0 \n" \
|
|
"movl $1, %%ecx \n" \
|
|
"movl %2, %%edx \n" \
|
|
"movl %3, %%ebx \n" \
|
|
"movl %4, %%esi \n" \
|
|
"movl %4, %%edi \n" \
|
|
".byte 0xf3,0x0f,0xa7,0xc8\n" \
|
|
"movl %1, %%ebx \n"
|
|
: "=m" (ebx)
|
|
: "m" (ebx), "m" (ctrl), "m" (rk), "m" (blk)
|
|
: "ecx", "edx", "esi", "edi" );
|
|
|
|
memcpy( output, blk, 16 );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/*
|
|
* PadLock AES-CBC buffer en(de)cryption
|
|
*/
|
|
int padlock_xcryptcbc( aes_context *ctx,
|
|
int mode,
|
|
int length,
|
|
unsigned char iv[16],
|
|
unsigned char *input,
|
|
unsigned char *output )
|
|
{
|
|
int ebx, count;
|
|
unsigned long *rk;
|
|
unsigned long *iw;
|
|
unsigned long *ctrl;
|
|
unsigned char buf[256];
|
|
|
|
if( ( (long) input & 15 ) != 0 ||
|
|
( (long) output & 15 ) != 0 )
|
|
return( 1 );
|
|
|
|
rk = ctx->rk;
|
|
iw = 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; popfl \n" \
|
|
"movl %%ebx, %0 \n" \
|
|
"movl %2, %%ecx \n" \
|
|
"movl %3, %%edx \n" \
|
|
"movl %4, %%ebx \n" \
|
|
"movl %5, %%esi \n" \
|
|
"movl %6, %%edi \n" \
|
|
"movl %7, %%eax \n" \
|
|
".byte 0xf3,0x0f,0xa7,0xd0\n" \
|
|
"movl %1, %%ebx \n"
|
|
: "=m" (ebx)
|
|
: "m" (ebx), "m" (count), "m" (ctrl),
|
|
"m" (rk), "m" (input), "m" (output), "m" (iw)
|
|
: "eax", "ecx", "edx", "esi", "edi" );
|
|
|
|
memcpy( iv, iw, 16 );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif
|