esp-idf/components/hal/ecdsa_hal.c
nilesh.kale 00fa28259b feat: enabled ecdsa support for c5
This commit adds support for ECDSA for ESP32-C5
2024-05-28 17:33:05 +05:30

188 lines
4.7 KiB
C

/*
* SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "hal/assert.h"
#include "hal/ecdsa_ll.h"
#include "hal/ecdsa_hal.h"
#include "hal/efuse_hal.h"
// Need to remove in IDF-8621
#if CONFIG_IDF_TARGET_ESP32C5
#include "soc/keymng_reg.h"
#endif
#ifdef SOC_KEY_MANAGER_SUPPORTED
#include "hal/key_mgr_hal.h"
#endif
#define ECDSA_HAL_P192_COMPONENT_LEN 24
#define ECDSA_HAL_P256_COMPONENT_LEN 32
static void configure_ecdsa_periph(ecdsa_hal_config_t *conf)
{
if (conf->use_km_key == 0) {
efuse_hal_set_ecdsa_key(conf->efuse_key_blk);
// Need to remove in IDF-8621
#if CONFIG_IDF_TARGET_ESP32C5
REG_SET_FIELD(KEYMNG_STATIC_REG, KEYMNG_USE_EFUSE_KEY, 1);
#endif
#if SOC_KEY_MANAGER_SUPPORTED
key_mgr_hal_set_key_usage(ESP_KEY_MGR_ECDSA_KEY, ESP_KEY_MGR_USE_EFUSE_KEY);
#endif
}
#if SOC_KEY_MANAGER_SUPPORTED
else {
key_mgr_hal_set_key_usage(ESP_KEY_MGR_ECDSA_KEY, ESP_KEY_MGR_USE_OWN_KEY);
}
#endif
ecdsa_ll_set_mode(conf->mode);
ecdsa_ll_set_curve(conf->curve);
if (conf->mode != ECDSA_MODE_EXPORT_PUBKEY) {
ecdsa_ll_set_z_mode(conf->sha_mode);
}
#if SOC_ECDSA_SUPPORT_DETERMINISTIC_MODE
ecdsa_ll_set_k_type(conf->sign_type);
if (conf->sign_type == ECDSA_K_TYPE_DETERMINISITIC) {
ecdsa_ll_set_deterministic_loop(conf->loop_number);
}
#endif
}
bool ecdsa_hal_get_operation_result(void)
{
return ecdsa_ll_get_operation_result();
}
void ecdsa_hal_gen_signature(ecdsa_hal_config_t *conf, const uint8_t *hash,
uint8_t *r_out, uint8_t *s_out, uint16_t len)
{
if (len != ECDSA_HAL_P192_COMPONENT_LEN && len != ECDSA_HAL_P256_COMPONENT_LEN) {
HAL_ASSERT(false && "Incorrect length");
}
if (conf->sha_mode == ECDSA_Z_USER_PROVIDED && hash == NULL) {
HAL_ASSERT(false && "Mismatch in SHA configuration");
}
if (ecdsa_ll_get_state() != ECDSA_STATE_IDLE) {
HAL_ASSERT(false && "Incorrect ECDSA state");
}
configure_ecdsa_periph(conf);
ecdsa_ll_set_stage(ECDSA_STAGE_START_CALC);
while(ecdsa_ll_get_state() != ECDSA_STATE_LOAD) {
;
}
ecdsa_ll_write_param(ECDSA_PARAM_Z, hash, len);
ecdsa_ll_set_stage(ECDSA_STAGE_LOAD_DONE);
while (ecdsa_ll_get_state() != ECDSA_STATE_GET) {
;
}
ecdsa_ll_read_param(ECDSA_PARAM_R, r_out, len);
ecdsa_ll_read_param(ECDSA_PARAM_S, s_out, len);
ecdsa_ll_set_stage(ECDSA_STAGE_GET_DONE);
while (ecdsa_ll_get_state() != ECDSA_STATE_IDLE) {
;
}
}
int ecdsa_hal_verify_signature(ecdsa_hal_config_t *conf, const uint8_t *hash, const uint8_t *r, const uint8_t *s,
const uint8_t *pub_x, const uint8_t *pub_y, uint16_t len)
{
if (len != ECDSA_HAL_P192_COMPONENT_LEN && len != ECDSA_HAL_P256_COMPONENT_LEN) {
HAL_ASSERT(false && "Incorrect length");
}
if (ecdsa_ll_get_state() != ECDSA_STATE_IDLE) {
HAL_ASSERT(false && "Incorrect ECDSA state");
}
configure_ecdsa_periph(conf);
ecdsa_ll_set_stage(ECDSA_STAGE_START_CALC);
while(ecdsa_ll_get_state() != ECDSA_STATE_LOAD) {
;
}
ecdsa_ll_write_param(ECDSA_PARAM_Z, hash, len);
ecdsa_ll_write_param(ECDSA_PARAM_R, r, len);
ecdsa_ll_write_param(ECDSA_PARAM_S, s, len);
ecdsa_ll_write_param(ECDSA_PARAM_QAX, pub_x, len);
ecdsa_ll_write_param(ECDSA_PARAM_QAY, pub_y, len);
ecdsa_ll_set_stage(ECDSA_STAGE_LOAD_DONE);
while (ecdsa_ll_get_state() != ECDSA_STATE_IDLE) {
;
}
bool res = ecdsa_hal_get_operation_result();
return (res ? 0 : -1);
}
#ifdef SOC_ECDSA_SUPPORT_EXPORT_PUBKEY
void ecdsa_hal_export_pubkey(ecdsa_hal_config_t *conf, uint8_t *pub_x, uint8_t *pub_y, uint16_t len)
{
if (len != ECDSA_HAL_P192_COMPONENT_LEN && len != ECDSA_HAL_P256_COMPONENT_LEN) {
HAL_ASSERT(false && "Incorrect length");
}
if (ecdsa_ll_get_state() != ECDSA_STATE_IDLE) {
HAL_ASSERT(false && "Incorrect ECDSA state");
}
configure_ecdsa_periph(conf);
ecdsa_ll_set_stage(ECDSA_STAGE_START_CALC);
while(ecdsa_ll_get_state() != ECDSA_STATE_LOAD) {
;
}
ecdsa_ll_set_stage(ECDSA_STAGE_LOAD_DONE);
while (ecdsa_ll_get_state() != ECDSA_STATE_GET) {
;
}
ecdsa_ll_read_param(ECDSA_PARAM_QAX, pub_x, len);
ecdsa_ll_read_param(ECDSA_PARAM_QAY, pub_y, len);
ecdsa_ll_set_stage(ECDSA_STAGE_GET_DONE);
while (ecdsa_ll_get_state() != ECDSA_STATE_IDLE) {
;
}
}
#endif /* SOC_ECDSA_SUPPORT_EXPORT_PUBKEY */
#ifdef SOC_ECDSA_SUPPORT_DETERMINISTIC_MODE
bool ecdsa_hal_det_signature_k_check(void)
{
return (ecdsa_ll_check_k_value() == 0);
}
#endif /* SOC_ECDSA_SUPPORT_DETERMINISTIC_MODE */