esp-idf/components/mbedtls/port/ecc/esp_ecc.c

81 lines
1.7 KiB
C

/*
* SPDX-FileCopyrightText: 2021-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <string.h>
#include <stdio.h>
#include "esp_crypto_lock.h"
#include "esp_private/esp_crypto_lock_internal.h"
#include "ecc_impl.h"
#include "hal/ecc_hal.h"
#include "hal/ecc_ll.h"
static void esp_ecc_acquire_hardware(void)
{
esp_crypto_ecc_lock_acquire();
ECC_RCC_ATOMIC() {
ecc_ll_enable_bus_clock(true);
ecc_ll_reset_register();
}
}
static void esp_ecc_release_hardware(void)
{
ECC_RCC_ATOMIC() {
ecc_ll_enable_bus_clock(false);
}
esp_crypto_ecc_lock_release();
}
int esp_ecc_point_multiply(const ecc_point_t *point, const uint8_t *scalar, ecc_point_t *result, bool verify_first)
{
int ret = -1;
uint16_t len = point->len;
ecc_mode_t work_mode = verify_first ? ECC_MODE_VERIFY_THEN_POINT_MUL : ECC_MODE_POINT_MUL;
esp_ecc_acquire_hardware();
ecc_hal_write_mul_param(scalar, point->x, point->y, len);
ecc_hal_set_mode(work_mode);
ecc_hal_start_calc();
memset(result, 0, sizeof(ecc_point_t));
result->len = len;
while (!ecc_hal_is_calc_finished()) {
;
}
ret = ecc_hal_read_mul_result(result->x, result->y, len);
esp_ecc_release_hardware();
return ret;
}
int esp_ecc_point_verify(const ecc_point_t *point)
{
int result;
esp_ecc_acquire_hardware();
ecc_hal_write_verify_param(point->x, point->y, point->len);
ecc_hal_set_mode(ECC_MODE_VERIFY);
ecc_hal_start_calc();
while (!ecc_hal_is_calc_finished()) {
;
}
result = ecc_hal_read_verify_result();
esp_ecc_release_hardware();
return result;
}