/* * 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; }