diff options
Diffstat (limited to 'lib/mbedtls-2.27.0/library/padlock.c')
| -rw-r--r-- | lib/mbedtls-2.27.0/library/padlock.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/lib/mbedtls-2.27.0/library/padlock.c b/lib/mbedtls-2.27.0/library/padlock.c new file mode 100644 index 0000000..8373374 --- /dev/null +++ b/lib/mbedtls-2.27.0/library/padlock.c @@ -0,0 +1,164 @@ +/* + * VIA PadLock support functions + * + * Copyright The Mbed TLS Contributors + * 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 implementation is based on the VIA PadLock Programming Guide: + * + * http://www.via.com.tw/en/downloads/whitepapers/initiatives/padlock/ + * programming_guide.pdf + */ + +#include "common.h" + +#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 1f \n\t" + "movl $0xC0000001, %%eax \n\t" + "cpuid \n\t" + "1: \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 */ |