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105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
/*
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* SPDX-FileCopyrightText: 2023 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 "hal/assert.h"
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#include "hal/ecdsa_ll.h"
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#include "hal/ecdsa_hal.h"
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#include "hal/efuse_hal.h"
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#define ECDSA_HAL_P192_COMPONENT_LEN 24
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#define ECDSA_HAL_P256_COMPONENT_LEN 32
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static void configure_ecdsa_periph(ecdsa_hal_config_t *conf)
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{
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efuse_hal_set_ecdsa_key(conf->efuse_key_blk);
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ecdsa_ll_set_mode(conf->mode);
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ecdsa_ll_set_curve(conf->curve);
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ecdsa_ll_set_k_mode(conf->k_mode);
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ecdsa_ll_set_z_mode(conf->sha_mode);
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}
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void ecdsa_hal_gen_signature(ecdsa_hal_config_t *conf, const uint8_t *k, const uint8_t *hash,
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uint8_t *r_out, uint8_t *s_out, uint16_t len)
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{
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if (len != ECDSA_HAL_P192_COMPONENT_LEN && len != ECDSA_HAL_P256_COMPONENT_LEN) {
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HAL_ASSERT(false && "Incorrect length");
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}
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if (conf->k_mode == ECDSA_K_USER_PROVIDED && k == NULL) {
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HAL_ASSERT(false && "Mismatch in K configuration");
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}
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if (conf->sha_mode == ECDSA_Z_USER_PROVIDED && hash == NULL) {
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HAL_ASSERT(false && "Mismatch in SHA configuration");
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}
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if (ecdsa_ll_get_state() != ECDSA_STATE_IDLE) {
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HAL_ASSERT(false && "Incorrect ECDSA state");
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}
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configure_ecdsa_periph(conf);
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ecdsa_ll_set_stage(ECDSA_STAGE_START_CALC);
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while(ecdsa_ll_get_state() != ECDSA_STATE_LOAD) {
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;
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}
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ecdsa_ll_write_param(ECDSA_PARAM_Z, hash, len);
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ecdsa_ll_set_stage(ECDSA_STAGE_LOAD_DONE);
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while (ecdsa_ll_get_state() != ECDSA_STATE_GET) {
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;
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}
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ecdsa_ll_read_param(ECDSA_PARAM_R, r_out, len);
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ecdsa_ll_read_param(ECDSA_PARAM_S, s_out, len);
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ecdsa_ll_set_stage(ECDSA_STAGE_GET_DONE);
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while (ecdsa_ll_get_state() != ECDSA_STATE_IDLE) {
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;
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}
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}
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int ecdsa_hal_verify_signature(ecdsa_hal_config_t *conf, const uint8_t *hash, const uint8_t *r, const uint8_t *s,
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const uint8_t *pub_x, const uint8_t *pub_y, uint16_t len)
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{
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if (len != ECDSA_HAL_P192_COMPONENT_LEN && len != ECDSA_HAL_P256_COMPONENT_LEN) {
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HAL_ASSERT(false && "Incorrect length");
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}
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if (ecdsa_ll_get_state() != ECDSA_STATE_IDLE) {
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HAL_ASSERT(false && "Incorrect ECDSA state");
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}
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configure_ecdsa_periph(conf);
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ecdsa_ll_set_stage(ECDSA_STAGE_START_CALC);
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while(ecdsa_ll_get_state() != ECDSA_STATE_LOAD) {
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;
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}
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ecdsa_ll_write_param(ECDSA_PARAM_Z, hash, len);
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ecdsa_ll_write_param(ECDSA_PARAM_R, r, len);
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ecdsa_ll_write_param(ECDSA_PARAM_S, s, len);
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ecdsa_ll_write_param(ECDSA_PARAM_QAX, pub_x, len);
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ecdsa_ll_write_param(ECDSA_PARAM_QAY, pub_y, len);
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ecdsa_ll_set_stage(ECDSA_STAGE_LOAD_DONE);
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while (ecdsa_ll_get_state() != ECDSA_STATE_IDLE) {
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;
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}
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int res = ecdsa_ll_get_verification_result();
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return (res ? 0 : -1);
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}
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