d76a26e086
Keep applying the windows entropy patch (UWP support).
Remove no longer needed padlock patch.
Update thirdparty README to reflect changes, and new source inclusion
criteria.
(cherry picked from commit e375cbd094)
164 lines
4.5 KiB
C
164 lines
4.5 KiB
C
/*
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* VIA PadLock support functions
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*
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* Copyright The Mbed TLS Contributors
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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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/*
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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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#include "common.h"
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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 1f \n\t"
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"movl $0xC0000001, %%eax \n\t"
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"cpuid \n\t"
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"1: \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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