Modified mbed TLS headers for AES functionality only to reduce build size
Dependents: BLE_Gateway_Linker_fix BLE_Gateway
Fork of mbedtls by
source/padlock.c
- Committer:
- Christopher Haster
- Date:
- 2016-01-22
- Revision:
- 1:24750b9ad5ef
File content as of revision 1:24750b9ad5ef:
/* * VIA PadLock support functions * * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved * SPDX-License-Identifier: Apache-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. * * 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 */