| /* |
| * VIA PadLock support functions |
| * |
| * Copyright The Mbed TLS Contributors |
| * 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 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 */ |