kopia lustrzana https://github.com/espressif/esp-idf
76 wiersze
1.6 KiB
C
76 wiersze
1.6 KiB
C
/*
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* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <string.h>
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#include <stdio.h>
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#include "esp_private/periph_ctrl.h"
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#include "ecc_impl.h"
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#include "hal/ecc_hal.h"
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static _lock_t s_crypto_ecc_lock;
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static void esp_ecc_acquire_hardware(void)
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{
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_lock_acquire(&s_crypto_ecc_lock);
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periph_module_enable(PERIPH_ECC_MODULE);
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}
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static void esp_ecc_release_hardware(void)
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{
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periph_module_disable(PERIPH_ECC_MODULE);
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_lock_release(&s_crypto_ecc_lock);
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}
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int esp_ecc_point_multiply(const ecc_point_t *point, const uint8_t *scalar, ecc_point_t *result, bool verify_first)
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{
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int ret = -1;
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uint16_t len = point->len;
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ecc_mode_t work_mode = verify_first ? ECC_MODE_VERIFY_THEN_POINT_MUL : ECC_MODE_POINT_MUL;
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esp_ecc_acquire_hardware();
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ecc_hal_write_mul_param(scalar, point->x, point->y, len);
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ecc_hal_set_mode(work_mode);
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ecc_hal_start_calc();
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memset(result, 0, sizeof(ecc_point_t));
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result->len = len;
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while (!ecc_hal_is_calc_finished()) {
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;
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}
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ret = ecc_hal_read_mul_result(result->x, result->y, len);
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esp_ecc_release_hardware();
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return ret;
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}
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int esp_ecc_point_verify(const ecc_point_t *point)
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{
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int result;
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esp_ecc_acquire_hardware();
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ecc_hal_write_verify_param(point->x, point->y, point->len);
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ecc_hal_set_mode(ECC_MODE_VERIFY);
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ecc_hal_start_calc();
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while (!ecc_hal_is_calc_finished()) {
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;
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}
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result = ecc_hal_read_verify_result();
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esp_ecc_release_hardware();
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return result;
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}
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