mirror of
https://github.com/libretro/dolphin
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9872473f70
PolarSSL has been renamed to "mbed TLS" and version 2.0 dropped backwards compatibility. This commit adds only the necessary files without any modifications, so it doesn't compile yet.
171 lines
4.7 KiB
C
171 lines
4.7 KiB
C
/*
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* VIA PadLock support functions
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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/*
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* This implementation is based on the VIA PadLock Programming Guide:
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*
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* http://www.via.com.tw/en/downloads/whitepapers/initiatives/padlock/
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* programming_guide.pdf
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*/
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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "mbedtls/config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#if defined(MBEDTLS_PADLOCK_C)
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#include "mbedtls/padlock.h"
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#include <string.h>
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#ifndef asm
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#define asm __asm
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#endif
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#if defined(MBEDTLS_HAVE_X86)
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/*
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* PadLock detection routine
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*/
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int mbedtls_padlock_has_support( int feature )
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{
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static int flags = -1;
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int ebx = 0, edx = 0;
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if( flags == -1 )
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{
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asm( "movl %%ebx, %0 \n\t"
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"movl $0xC0000000, %%eax \n\t"
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"cpuid \n\t"
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"cmpl $0xC0000001, %%eax \n\t"
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"movl $0, %%edx \n\t"
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"jb unsupported \n\t"
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"movl $0xC0000001, %%eax \n\t"
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"cpuid \n\t"
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"unsupported: \n\t"
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"movl %%edx, %1 \n\t"
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"movl %2, %%ebx \n\t"
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: "=m" (ebx), "=m" (edx)
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: "m" (ebx)
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: "eax", "ecx", "edx" );
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flags = edx;
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}
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return( flags & feature );
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}
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/*
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* PadLock AES-ECB block en(de)cryption
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*/
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int mbedtls_padlock_xcryptecb( mbedtls_aes_context *ctx,
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int mode,
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const unsigned char input[16],
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unsigned char output[16] )
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{
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int ebx = 0;
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uint32_t *rk;
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uint32_t *blk;
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uint32_t *ctrl;
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unsigned char buf[256];
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rk = ctx->rk;
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blk = MBEDTLS_PADLOCK_ALIGN16( buf );
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memcpy( blk, input, 16 );
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ctrl = blk + 4;
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*ctrl = 0x80 | ctx->nr | ( ( ctx->nr + ( mode^1 ) - 10 ) << 9 );
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asm( "pushfl \n\t"
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"popfl \n\t"
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"movl %%ebx, %0 \n\t"
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"movl $1, %%ecx \n\t"
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"movl %2, %%edx \n\t"
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"movl %3, %%ebx \n\t"
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"movl %4, %%esi \n\t"
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"movl %4, %%edi \n\t"
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".byte 0xf3,0x0f,0xa7,0xc8 \n\t"
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"movl %1, %%ebx \n\t"
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: "=m" (ebx)
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: "m" (ebx), "m" (ctrl), "m" (rk), "m" (blk)
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: "memory", "ecx", "edx", "esi", "edi" );
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memcpy( output, blk, 16 );
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return( 0 );
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}
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/*
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* PadLock AES-CBC buffer en(de)cryption
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*/
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int mbedtls_padlock_xcryptcbc( mbedtls_aes_context *ctx,
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int mode,
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size_t length,
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unsigned char iv[16],
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const unsigned char *input,
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unsigned char *output )
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{
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int ebx = 0;
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size_t count;
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uint32_t *rk;
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uint32_t *iw;
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uint32_t *ctrl;
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unsigned char buf[256];
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if( ( (long) input & 15 ) != 0 ||
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( (long) output & 15 ) != 0 )
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return( MBEDTLS_ERR_PADLOCK_DATA_MISALIGNED );
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rk = ctx->rk;
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iw = MBEDTLS_PADLOCK_ALIGN16( buf );
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memcpy( iw, iv, 16 );
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ctrl = iw + 4;
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*ctrl = 0x80 | ctx->nr | ( ( ctx->nr + ( mode ^ 1 ) - 10 ) << 9 );
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count = ( length + 15 ) >> 4;
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asm( "pushfl \n\t"
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"popfl \n\t"
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"movl %%ebx, %0 \n\t"
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"movl %2, %%ecx \n\t"
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"movl %3, %%edx \n\t"
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"movl %4, %%ebx \n\t"
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"movl %5, %%esi \n\t"
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"movl %6, %%edi \n\t"
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"movl %7, %%eax \n\t"
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".byte 0xf3,0x0f,0xa7,0xd0 \n\t"
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"movl %1, %%ebx \n\t"
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: "=m" (ebx)
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: "m" (ebx), "m" (count), "m" (ctrl),
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"m" (rk), "m" (input), "m" (output), "m" (iw)
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: "memory", "eax", "ecx", "edx", "esi", "edi" );
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memcpy( iv, iw, 16 );
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return( 0 );
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}
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#endif /* MBEDTLS_HAVE_X86 */
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#endif /* MBEDTLS_PADLOCK_C */
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