154 lines
4.1 KiB
C
154 lines
4.1 KiB
C
/*
|
|
* VIA PadLock support functions
|
|
*
|
|
* Copyright The Mbed TLS Contributors
|
|
* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
|
|
*/
|
|
/*
|
|
* 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>
|
|
|
|
/* *INDENT-OFF* */
|
|
#ifndef asm
|
|
#define asm __asm
|
|
#endif
|
|
/* *INDENT-ON* */
|
|
|
|
#if defined(MBEDTLS_VIA_PADLOCK_HAVE_CODE)
|
|
|
|
/*
|
|
* 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_VIA_PADLOCK_HAVE_CODE */
|
|
|
|
#endif /* MBEDTLS_PADLOCK_C */
|