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/*
* Copyright (c) 2019 Winner Microelectronics Co., Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-07-10 Ernest 1st version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <stdlib.h>
#include <string.h>
#include "drv_crypto.h"
#include "board.h"
struct stm32_hwcrypto_device
{
struct rt_hwcrypto_device dev;
struct rt_mutex mutex;
};
#if defined(BSP_USING_CRC)
struct hash_ctx_des
{
CRC_HandleTypeDef contex;
};
#if defined(SOC_SERIES_STM32L4) || defined(SOC_SERIES_STM32F0) || defined(SOC_SERIES_STM32H7) || defined(SOC_SERIES_STM32F7)
static struct hwcrypto_crc_cfg crc_backup_cfg;
static int reverse_bit(rt_uint32_t n)
{
n = ((n >> 1) & 0x55555555) | ((n << 1) & 0xaaaaaaaa);
n = ((n >> 2) & 0x33333333) | ((n << 2) & 0xcccccccc);
n = ((n >> 4) & 0x0f0f0f0f) | ((n << 4) & 0xf0f0f0f0);
n = ((n >> 8) & 0x00ff00ff) | ((n << 8) & 0xff00ff00);
n = ((n >> 16) & 0x0000ffff) | ((n << 16) & 0xffff0000);
return n;
}
#endif /* defined(SOC_SERIES_STM32L4) || defined(SOC_SERIES_STM32F0) || defined(SOC_SERIES_STM32H7) || defined(SOC_SERIES_STM32F7) */
static rt_uint32_t _crc_update(struct hwcrypto_crc *ctx, const rt_uint8_t *in, rt_size_t length)
{
rt_uint32_t result = 0;
struct stm32_hwcrypto_device *stm32_hw_dev = (struct stm32_hwcrypto_device *)ctx->parent.device->user_data;
#if defined(SOC_SERIES_STM32L4)|| defined(SOC_SERIES_STM32F0) || defined(SOC_SERIES_STM32H7) || defined(SOC_SERIES_STM32F7)
CRC_HandleTypeDef *HW_TypeDef = (CRC_HandleTypeDef *)(ctx->parent.contex);
#endif
rt_mutex_take(&stm32_hw_dev->mutex, RT_WAITING_FOREVER);
#if defined(SOC_SERIES_STM32L4) || defined(SOC_SERIES_STM32F0) || defined(SOC_SERIES_STM32H7) || defined(SOC_SERIES_STM32F7)
if (memcmp(&crc_backup_cfg, &ctx->crc_cfg, sizeof(struct hwcrypto_crc_cfg)) != 0)
{
if (HW_TypeDef->Init.DefaultPolynomialUse == DEFAULT_POLYNOMIAL_DISABLE)
{
HW_TypeDef->Init.GeneratingPolynomial = ctx ->crc_cfg.poly;
}
else
{
HW_TypeDef->Init.GeneratingPolynomial = DEFAULT_CRC32_POLY;
}
switch (ctx ->crc_cfg.flags)
{
case 0:
HW_TypeDef->Init.InputDataInversionMode = CRC_INPUTDATA_INVERSION_NONE;
HW_TypeDef->Init.OutputDataInversionMode = CRC_OUTPUTDATA_INVERSION_DISABLE;
break;
case CRC_FLAG_REFIN:
HW_TypeDef->Init.InputDataInversionMode = CRC_INPUTDATA_INVERSION_BYTE;
break;
case CRC_FLAG_REFOUT:
HW_TypeDef->Init.OutputDataInversionMode = CRC_OUTPUTDATA_INVERSION_ENABLE;
break;
case CRC_FLAG_REFIN|CRC_FLAG_REFOUT:
HW_TypeDef->Init.InputDataInversionMode = CRC_INPUTDATA_INVERSION_BYTE;
HW_TypeDef->Init.OutputDataInversionMode = CRC_OUTPUTDATA_INVERSION_ENABLE;
break;
default :
goto _exit;
}
HW_TypeDef->Init.CRCLength = ctx ->crc_cfg.width;
if (HW_TypeDef->Init.DefaultInitValueUse == DEFAULT_INIT_VALUE_DISABLE)
{
HW_TypeDef->Init.InitValue = ctx ->crc_cfg.last_val;
}
if (HAL_CRC_Init(HW_TypeDef) != HAL_OK)
{
goto _exit;
}
memcpy(&crc_backup_cfg, &ctx->crc_cfg, sizeof(struct hwcrypto_crc_cfg));
}
if (HAL_CRC_STATE_READY != HAL_CRC_GetState(HW_TypeDef))
{
goto _exit;
}
#else
if (ctx->crc_cfg.flags != 0 || ctx->crc_cfg.last_val != 0xFFFFFFFF || ctx->crc_cfg.xorout != 0 || length % 4 != 0)
{
goto _exit;
}
length /= 4;
#endif /* defined(SOC_SERIES_STM32L4) || defined(SOC_SERIES_STM32F0) || defined(SOC_SERIES_STM32H7) || defined(SOC_SERIES_STM32F7) */
result = HAL_CRC_Accumulate(ctx->parent.contex, (rt_uint32_t *)in, length);
#if defined(SOC_SERIES_STM32L4) || defined(SOC_SERIES_STM32F0) || defined(SOC_SERIES_STM32H7) || defined(SOC_SERIES_STM32F7)
if (HW_TypeDef->Init.OutputDataInversionMode)
{
ctx ->crc_cfg.last_val = reverse_bit(result);
}
else
{
ctx ->crc_cfg.last_val = result;
}
crc_backup_cfg.last_val = ctx ->crc_cfg.last_val;
result = (result ? result ^ (ctx ->crc_cfg.xorout) : result);
#endif /* defined(SOC_SERIES_STM32L4)|| defined(SOC_SERIES_STM32F0) || defined(SOC_SERIES_STM32H7) || defined(SOC_SERIES_STM32F7) */
_exit:
rt_mutex_release(&stm32_hw_dev->mutex);
return result;
}
static const struct hwcrypto_crc_ops crc_ops =
{
.update = _crc_update,
};
#endif /* BSP_USING_CRC */
#if defined(BSP_USING_RNG)
static rt_uint32_t _rng_rand(struct hwcrypto_rng *ctx)
{
rt_uint32_t gen_random = 0;
RNG_HandleTypeDef *HW_TypeDef = (RNG_HandleTypeDef *)(ctx->parent.contex);
if (HAL_OK == HAL_RNG_GenerateRandomNumber(HW_TypeDef, &gen_random))
{
return gen_random ;
}
return 0;
}
static const struct hwcrypto_rng_ops rng_ops =
{
.update = _rng_rand,
};
#endif /* BSP_USING_RNG */
static rt_err_t _crypto_create(struct rt_hwcrypto_ctx *ctx)
{
rt_err_t res = RT_EOK;
switch (ctx->type & HWCRYPTO_MAIN_TYPE_MASK)
{
#if defined(BSP_USING_RNG)
case HWCRYPTO_TYPE_RNG:
{
RNG_HandleTypeDef *hrng = rt_calloc(1, sizeof(RNG_HandleTypeDef));
hrng->Instance = RNG;
HAL_RNG_Init(hrng);
ctx->contex = hrng;
((struct hwcrypto_rng *)ctx)->ops = &rng_ops;
break;
}
#endif /* BSP_USING_RNG */
#if defined(BSP_USING_CRC)
case HWCRYPTO_TYPE_CRC:
{
CRC_HandleTypeDef *hcrc = rt_calloc(1, sizeof(CRC_HandleTypeDef));
if (RT_NULL == hcrc)
{
res = -RT_ERROR;
break;
}
hcrc->Instance = CRC;
#if defined(SOC_SERIES_STM32L4) || defined(SOC_SERIES_STM32F0) || defined(SOC_SERIES_STM32H7) || defined(SOC_SERIES_STM32F7)
hcrc->Init.DefaultPolynomialUse = DEFAULT_POLYNOMIAL_ENABLE;
hcrc->Init.DefaultInitValueUse = DEFAULT_INIT_VALUE_DISABLE;
hcrc->Init.InputDataInversionMode = CRC_INPUTDATA_INVERSION_BYTE;
hcrc->Init.OutputDataInversionMode = CRC_OUTPUTDATA_INVERSION_ENABLE;
hcrc->InputDataFormat = CRC_INPUTDATA_FORMAT_BYTES;
#else
if (HAL_CRC_Init(hcrc) != HAL_OK)
{
res = -RT_ERROR;
}
#endif /* defined(SOC_SERIES_STM32L4) || defined(SOC_SERIES_STM32F0) || defined(SOC_SERIES_STM32H7) || defined(SOC_SERIES_STM32F7) */
ctx->contex = hcrc;
((struct hwcrypto_crc *)ctx)->ops = &crc_ops;
break;
}
#endif /* BSP_USING_CRC */
default:
res = -RT_ERROR;
break;
}
return res;
}
static void _crypto_destroy(struct rt_hwcrypto_ctx *ctx)
{
switch (ctx->type & HWCRYPTO_MAIN_TYPE_MASK)
{
#if defined(BSP_USING_RNG)
case HWCRYPTO_TYPE_RNG:
break;
#endif /* BSP_USING_RNG */
#if defined(BSP_USING_CRC)
case HWCRYPTO_TYPE_CRC:
__HAL_CRC_DR_RESET((CRC_HandleTypeDef *)ctx-> contex);
HAL_CRC_DeInit((CRC_HandleTypeDef *)(ctx->contex));
break;
#endif /* BSP_USING_CRC */
default:
break;
}
rt_free(ctx->contex);
}
static rt_err_t _crypto_clone(struct rt_hwcrypto_ctx *des, const struct rt_hwcrypto_ctx *src)
{
rt_err_t res = RT_EOK;
switch (src->type & HWCRYPTO_MAIN_TYPE_MASK)
{
#if defined(BSP_USING_RNG)
case HWCRYPTO_TYPE_RNG:
if (des->contex && src->contex)
{
rt_memcpy(des->contex, src->contex, sizeof(struct hash_ctx_des));
}
break;
#endif /* BSP_USING_RNG */
#if defined(BSP_USING_CRC)
case HWCRYPTO_TYPE_CRC:
if (des->contex && src->contex)
{
rt_memcpy(des->contex, src->contex, sizeof(struct hash_ctx_des));
}
break;
#endif /* BSP_USING_CRC */
default:
res = -RT_ERROR;
break;
}
return res;
}
static void _crypto_reset(struct rt_hwcrypto_ctx *ctx)
{
switch (ctx->type & HWCRYPTO_MAIN_TYPE_MASK)
{
#if defined(BSP_USING_RNG)
case HWCRYPTO_TYPE_RNG:
break;
#endif /* BSP_USING_RNG */
#if defined(BSP_USING_CRC)
case HWCRYPTO_TYPE_CRC:
__HAL_CRC_DR_RESET((CRC_HandleTypeDef *)ctx-> contex);
break;
#endif /* BSP_USING_CRC */
default:
break;
}
}
static const struct rt_hwcrypto_ops _ops =
{
.create = _crypto_create,
.destroy = _crypto_destroy,
.copy = _crypto_clone,
.reset = _crypto_reset,
};
int stm32_hw_crypto_device_init(void)
{
static struct stm32_hwcrypto_device _crypto_dev;
rt_uint32_t cpuid[3] = {0};
_crypto_dev.dev.ops = &_ops;
#if defined(BSP_USING_UDID)
#if defined(SOC_SERIES_STM32L4) || defined(SOC_SERIES_STM32F0) || defined(SOC_SERIES_STM32F1) || defined(SOC_SERIES_STM32F4) || defined(SOC_SERIES_STM32F7)
cpuid[0] = HAL_GetUIDw0();
cpuid[1] = HAL_GetUIDw1();
#elif defined(SOC_SERIES_STM32H7)
cpuid[0] = HAL_GetREVID();
cpuid[1] = HAL_GetDEVID();
#endif
#endif /* BSP_USING_UDID */
_crypto_dev.dev.id = 0;
rt_memcpy(&_crypto_dev.dev.id, cpuid, 8);
_crypto_dev.dev.user_data = &_crypto_dev;
if (rt_hwcrypto_register(&_crypto_dev.dev, RT_HWCRYPTO_DEFAULT_NAME) != RT_EOK)
{
return -1;
}
rt_mutex_init(&_crypto_dev.mutex, RT_HWCRYPTO_DEFAULT_NAME, RT_IPC_FLAG_FIFO);
return 0;
}
INIT_DEVICE_EXPORT(stm32_hw_crypto_device_init);
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