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feat(ecc): add ECC peripheral support for esp32p4

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This commit is contained in:
harshal.patil 2023-07-18 12:22:44 +05:30
parent b4cf035608
commit f2801ae4c9
6 changed files with 243 additions and 1 deletions
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210
components/hal/esp32p4/include/hal/ecc_ll.h Normal file
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@ -0,0 +1,210 @@
/*
* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include <stdbool.h>
#include <string.h>
#include "hal/assert.h"
#include "hal/ecc_types.h"
#include "soc/ecc_mult_reg.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef enum {
ECC_PARAM_PX = 0x0,
ECC_PARAM_PY,
ECC_PARAM_K,
ECC_PARAM_QX,
ECC_PARAM_QY,
ECC_PARAM_QZ,
} ecc_ll_param_t;
static inline void ecc_ll_enable_interrupt(void)
{
REG_SET_FIELD(ECC_MULT_INT_ENA_REG, ECC_MULT_CALC_DONE_INT_ENA, 1);
}
static inline void ecc_ll_disable_interrupt(void)
{
REG_SET_FIELD(ECC_MULT_INT_ENA_REG, ECC_MULT_CALC_DONE_INT_ENA, 0);
}
static inline void ecc_ll_clear_interrupt(void)
{
REG_SET_FIELD(ECC_MULT_INT_CLR_REG, ECC_MULT_CALC_DONE_INT_CLR, 1);
}
static inline void ecc_ll_set_mode(ecc_mode_t mode)
{
switch(mode) {
case ECC_MODE_POINT_MUL:
REG_SET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_WORK_MODE, 0);
break;
case ECC_MODE_VERIFY:
REG_SET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_WORK_MODE, 2);
break;
case ECC_MODE_VERIFY_THEN_POINT_MUL:
REG_SET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_WORK_MODE, 3);
break;
case ECC_MODE_JACOBIAN_POINT_MUL:
REG_SET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_WORK_MODE, 4);
break;
case ECC_MODE_POINT_ADD:
REG_SET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_WORK_MODE, 5);
break;
case ECC_MODE_JACOBIAN_POINT_VERIFY:
REG_SET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_WORK_MODE, 6);
break;
case ECC_MODE_POINT_VERIFY_JACOBIAN_MUL:
REG_SET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_WORK_MODE, 7);
break;
case ECC_MODE_MOD_ADD:
REG_SET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_WORK_MODE, 8);
break;
case ECC_MODE_MOD_SUB:
REG_SET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_WORK_MODE, 9);
break;
case ECC_MODE_MOD_MUL:
REG_SET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_WORK_MODE, 10);
break;
case ECC_MODE_INVERSE_MUL:
REG_SET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_WORK_MODE, 11);
break;
default:
HAL_ASSERT(false && "Unsupported mode");
break;
}
}
static inline void ecc_ll_set_curve(ecc_curve_t curve)
{
switch(curve) {
case ECC_CURVE_SECP256R1:
REG_SET_BIT(ECC_MULT_CONF_REG, ECC_MULT_KEY_LENGTH);
break;
case ECC_CURVE_SECP192R1:
REG_CLR_BIT(ECC_MULT_CONF_REG, ECC_MULT_KEY_LENGTH);
break;
default:
HAL_ASSERT(false && "Unsupported curve");
return;
}
}
static inline void ecc_ll_set_mod_base(ecc_mod_base_t base)
{
switch(base) {
case ECC_MOD_N:
REG_CLR_BIT(ECC_MULT_CONF_REG, ECC_MULT_MOD_BASE);
break;
case ECC_MOD_P:
REG_SET_BIT(ECC_MULT_CONF_REG, ECC_MULT_MOD_BASE);
break;
default:
HAL_ASSERT(false && "Unsupported curve");
return;
}
}
static inline void ecc_ll_write_param(ecc_ll_param_t param, const uint8_t *buf, uint16_t len)
{
uint32_t reg;
uint32_t word;
switch (param) {
case ECC_PARAM_PX:
reg = ECC_MULT_PX_MEM;
break;
case ECC_PARAM_PY:
reg = ECC_MULT_PY_MEM;
break;
case ECC_PARAM_K:
reg = ECC_MULT_K_MEM;
break;
case ECC_PARAM_QX:
reg = ECC_MULT_QX_MEM;
break;
case ECC_PARAM_QY:
reg = ECC_MULT_QY_MEM;
break;
case ECC_PARAM_QZ:
reg = ECC_MULT_QZ_MEM;
break;
default:
HAL_ASSERT(false && "Invalid parameter");
return;
}
for (int i = 0; i < len; i += 4) {
memcpy(&word, buf + i, 4);
REG_WRITE(reg + i, word);
}
}
static inline void ecc_ll_start_calc(void)
{
REG_SET_BIT(ECC_MULT_CONF_REG, ECC_MULT_START);
}
static inline int ecc_ll_is_calc_finished(void)
{
return REG_GET_FIELD(ECC_MULT_INT_RAW_REG, ECC_MULT_CALC_DONE_INT_RAW);
}
static inline ecc_mode_t ecc_ll_get_mode(void)
{
return REG_GET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_WORK_MODE);
}
static inline int ecc_ll_get_verification_result(void)
{
return REG_GET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_VERIFICATION_RESULT);
}
static inline ecc_curve_t ecc_ll_get_curve(void)
{
return REG_GET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_KEY_LENGTH);
}
static inline ecc_mod_base_t ecc_ll_get_mod_base(void)
{
return REG_GET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_MOD_BASE);
}
static inline void ecc_ll_read_param(ecc_ll_param_t param, uint8_t *buf, uint16_t len)
{
uint32_t reg;
switch (param) {
case ECC_PARAM_PX:
reg = ECC_MULT_PX_MEM;
break;
case ECC_PARAM_PY:
reg = ECC_MULT_PY_MEM;
break;
case ECC_PARAM_K:
reg = ECC_MULT_K_MEM;
break;
case ECC_PARAM_QX:
reg = ECC_MULT_QX_MEM;
break;
case ECC_PARAM_QY:
reg = ECC_MULT_QY_MEM;
break;
case ECC_PARAM_QZ:
reg = ECC_MULT_QZ_MEM;
break;
default:
HAL_ASSERT(false && "Invalid parameter");
return;
}
memcpy(buf, (void *)reg, len);
}
#ifdef __cplusplus
}
#endif

8
components/soc/esp32p4/include/soc/Kconfig.soc_caps.in
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@ -43,6 +43,14 @@ config SOC_SYSTIMER_SUPPORTED
bool
default y
config SOC_ECC_SUPPORTED
bool
default y
config SOC_ECC_EXTENDED_MODES_SUPPORTED
bool
default y
config SOC_FLASH_ENC_SUPPORTED
bool
default y

18
components/soc/esp32p4/include/soc/ecc_mult_reg.h
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@ -162,6 +162,24 @@ extern "C" {
#define ECC_MULT_PY_MEM (DR_REG_ECC_MULT_BASE + 0x140)
#define ECC_MULT_PY_MEM_SIZE_BYTES 32
/** ECC_MULT_QX_MEM register
* The memory that stores Qx.
*/
#define ECC_MULT_QX_MEM (DR_REG_ECC_MULT_BASE + 0x160)
#define ECC_MULT_QX_MEM_SIZE_BYTES 32
/** ECC_MULT_QY_MEM register
* The memory that stores Qy.
*/
#define ECC_MULT_QY_MEM (DR_REG_ECC_MULT_BASE + 0x180)
#define ECC_MULT_QY_MEM_SIZE_BYTES 32
/** ECC_MULT_QZ_MEM register
* The memory that stores Qz.
*/
#define ECC_MULT_QZ_MEM (DR_REG_ECC_MULT_BASE + 0x1A0)
#define ECC_MULT_QZ_MEM_SIZE_BYTES 32
#ifdef __cplusplus
}
#endif

3
components/soc/esp32p4/include/soc/ecc_mult_struct.h
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@ -151,6 +151,9 @@ typedef struct {
volatile uint32_t k[8];
volatile uint32_t px[8];
volatile uint32_t py[8];
volatile uint32_t qx[8];
volatile uint32_t qy[8];
volatile uint32_t qz[8];
} ecc_mult_dev_t;

2
components/soc/esp32p4/include/soc/hwcrypto_reg.h
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@ -3,6 +3,8 @@
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#ifndef __HWCRYPTO_REG_H__
#define __HWCRYPTO_REG_H__

3
components/soc/esp32p4/include/soc/soc_caps.h
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@ -59,7 +59,8 @@
// #define SOC_SHA_SUPPORTED 1 //TODO: IDF-7541
// #define SOC_HMAC_SUPPORTED 1 //TODO: IDF-7543
// #define SOC_DIG_SIGN_SUPPORTED 1 //TODO: IDF-6518
// #define SOC_ECC_SUPPORTED 1 //TODO: IDF-7549
#define SOC_ECC_SUPPORTED 1
#define SOC_ECC_EXTENDED_MODES_SUPPORTED 1
#define SOC_FLASH_ENC_SUPPORTED 1
// #define SOC_SECURE_BOOT_SUPPORTED 1 //TODO: IDF-7544
// #define SOC_BOD_SUPPORTED 1 //TODO: IDF-7519