OVMS3-idf/components/mbedtls/port/esp32s2/esp_sha512.c
Marius Vikhammer 37369a8a57 crypto: SHA and AES accelerator bring up for S2
Brings up, fixes and enables AES and SHA hardware acceleration.

Closes IDF-714
Closes IDF-716
2020-03-11 15:09:45 +08:00

317 lines
7.9 KiB
C

/*
* SHA-512 implementation with hardware ESP32 support added.
* Uses mbedTLS software implementation for failover when concurrent
* SHA operations are in use.
*
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
* Additions Copyright (C) 2016-2020, Espressif Systems (Shanghai) PTE LTD
* 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.
*
*/
/*
* The SHA-512 Secure Hash Standard was published by NIST in 2002.
*
* http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
*/
#if !defined(MBEDTLS_CONFIG_FILE)
#include "mbedtls/config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif
#if defined(MBEDTLS_SHA512_C) && defined(MBEDTLS_SHA512_ALT)
#include "mbedtls/sha512.h"
#if defined(_MSC_VER) || defined(__WATCOMC__)
#define UL64(x) x##ui64
#else
#define UL64(x) x##ULL
#endif
#include <string.h>
#if defined(MBEDTLS_SELF_TEST)
#if defined(MBEDTLS_PLATFORM_C)
#include "mbedtls/platform.h"
#else
#include <stdio.h>
#define mbedtls_printf printf
#endif /* MBEDTLS_PLATFORM_C */
#endif /* MBEDTLS_SELF_TEST */
#include "esp32s2/sha.h"
/* Implementation that should never be optimized out by the compiler */
static void mbedtls_zeroize( void *v, size_t n )
{
volatile unsigned char *p = v; while ( n-- ) *p++ = 0;
}
/*
* 64-bit integer manipulation macros (big endian)
*/
#ifndef PUT_UINT64_BE
#define PUT_UINT64_BE(n,b,i) \
{ \
(b)[(i) ] = (unsigned char) ( (n) >> 56 ); \
(b)[(i) + 1] = (unsigned char) ( (n) >> 48 ); \
(b)[(i) + 2] = (unsigned char) ( (n) >> 40 ); \
(b)[(i) + 3] = (unsigned char) ( (n) >> 32 ); \
(b)[(i) + 4] = (unsigned char) ( (n) >> 24 ); \
(b)[(i) + 5] = (unsigned char) ( (n) >> 16 ); \
(b)[(i) + 6] = (unsigned char) ( (n) >> 8 ); \
(b)[(i) + 7] = (unsigned char) ( (n) ); \
}
#endif /* PUT_UINT64_BE */
void esp_sha512_set_mode(mbedtls_sha512_context *ctx, esp_sha_type type)
{
switch (type) {
case SHA2_384:
case SHA2_512224:
case SHA2_512256:
case SHA2_512T:
ctx->mode = type;
break;
default:
ctx->mode = SHA2_512;
break;
}
}
/* For SHA512/t mode the intial hash value will depend on t */
void esp_sha512_set_t( mbedtls_sha512_context *ctx, uint16_t t_val)
{
ctx->t_val = t_val;
}
void mbedtls_sha512_init( mbedtls_sha512_context *ctx )
{
memset( ctx, 0, sizeof( mbedtls_sha512_context ) );
}
void mbedtls_sha512_free( mbedtls_sha512_context *ctx )
{
if ( ctx == NULL ) {
return;
}
mbedtls_zeroize( ctx, sizeof( mbedtls_sha512_context ) );
}
void mbedtls_sha512_clone( mbedtls_sha512_context *dst,
const mbedtls_sha512_context *src )
{
memcpy(dst, src, sizeof(mbedtls_sha512_context));
}
/*
* SHA-512 context setup
*/
int mbedtls_sha512_starts_ret( mbedtls_sha512_context *ctx, int is384 )
{
mbedtls_zeroize( ctx, sizeof( mbedtls_sha512_context ) );
if ( is384 ) {
ctx->mode = SHA2_384;
} else {
ctx->mode = SHA2_512;
}
return 0;
}
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
void mbedtls_sha512_starts( mbedtls_sha512_context *ctx,
int is384 )
{
mbedtls_sha512_starts_ret( ctx, is384 );
}
#endif
static int esp_internal_sha512_dma_process(mbedtls_sha512_context *ctx,
const uint8_t *data, size_t len,
uint8_t *buf, size_t buf_len)
{
return esp_sha_dma(ctx->mode, data, len, buf, buf_len, ctx->first_block);
}
int mbedtls_internal_sha512_process( mbedtls_sha512_context *ctx, const unsigned char data[128] )
{
int ret;
esp_sha_acquire_hardware();
ret = esp_internal_sha512_dma_process(ctx, data, 128, 0, 0);
esp_sha_release_hardware();
return ret;
}
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
void mbedtls_sha512_process( mbedtls_sha512_context *ctx,
const unsigned char data[128] )
{
mbedtls_internal_sha512_process( ctx, data );
}
#endif
/*
* SHA-512 process buffer
*/
int mbedtls_sha512_update_ret( mbedtls_sha512_context *ctx, const unsigned char *input,
size_t ilen )
{
int ret;
size_t fill;
unsigned int left, len, local_len = 0;
if ( ilen == 0 ) {
return 0;
}
left = (unsigned int) (ctx->total[0] & 0x7F);
fill = 128 - left;
ctx->total[0] += (uint64_t) ilen;
if ( ctx->total[0] < (uint64_t) ilen ) {
ctx->total[1]++;
}
if ( left && ilen >= fill ) {
memcpy( (void *) (ctx->buffer + left), input, fill );
input += fill;
ilen -= fill;
left = 0;
local_len = 128;
}
len = (ilen / 128) * 128;
if ( len || local_len) {
esp_sha_acquire_hardware();
if (ctx->sha_state == ESP_SHA512_STATE_INIT) {
if (ctx->mode == SHA2_512T) {
esp_sha_512_t_init_hash(ctx->t_val);
ctx->first_block = false;
} else {
ctx->first_block = true;
}
ctx->sha_state = ESP_SHA512_STATE_IN_PROCESS;
} else if (ctx->sha_state == ESP_SHA512_STATE_IN_PROCESS) {
ctx->first_block = false;
esp_sha_write_digest_state(ctx->mode, ctx->state);
}
ret = esp_internal_sha512_dma_process(ctx, input, len, ctx->buffer, local_len);
esp_sha_read_digest_state(ctx->mode, ctx->state);
esp_sha_release_hardware();
if (ret != 0) {
return ret;
}
}
if ( ilen > 0 ) {
memcpy( (void *) (ctx->buffer + left), input + len, ilen - len );
}
return 0;
}
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
void mbedtls_sha512_update( mbedtls_sha512_context *ctx,
const unsigned char *input,
size_t ilen )
{
mbedtls_sha512_update_ret( ctx, input, ilen );
}
#endif
static const unsigned char sha512_padding[128] = {
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
/*
* SHA-512 final digest
*/
int mbedtls_sha512_finish_ret( mbedtls_sha512_context *ctx, unsigned char output[64] )
{
int ret;
size_t last, padn;
uint64_t high, low;
unsigned char msglen[16];
high = ( ctx->total[0] >> 61 )
| ( ctx->total[1] << 3 );
low = ( ctx->total[0] << 3 );
PUT_UINT64_BE( high, msglen, 0 );
PUT_UINT64_BE( low, msglen, 8 );
last = (size_t)( ctx->total[0] & 0x7F );
padn = ( last < 112 ) ? ( 112 - last ) : ( 240 - last );
if ( ( ret = mbedtls_sha512_update_ret( ctx, sha512_padding, padn ) ) != 0 ) {
return ret;
}
if ( ( ret = mbedtls_sha512_update_ret( ctx, msglen, 16 ) ) != 0 ) {
return ret;
}
if (ctx->mode == SHA2_384) {
memcpy(output, ctx->state, 48);
} else {
memcpy(output, ctx->state, 64);
}
return ret;
}
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
void mbedtls_sha512_finish( mbedtls_sha512_context *ctx,
unsigned char output[64] )
{
mbedtls_sha512_finish_ret( ctx, output );
}
#endif
#endif /* MBEDTLS_SHA512_C && MBEDTLS_SHA512_ALT */