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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-04-25 tyx the first version
*/
#ifndef __HW_RNG_H__
#define __HW_RNG_H__
#include <hwcrypto.h>
#ifdef __cplusplus
extern "C" {
#endif
struct hwcrypto_rng;
struct hwcrypto_rng_ops
{
rt_uint32_t (*update)(struct hwcrypto_rng *ctx); /**< Return a random number */
};
/**
* @brief random context. Hardware driver usage
*/
struct hwcrypto_rng
{
struct rt_hwcrypto_ctx parent; /**< Inheritance from hardware crypto context */
const struct hwcrypto_rng_ops *ops; /**< !! Hardware initializes this value when creating context !! */
};
/**
* @brief Creating RNG Context
*
* @param device Hardware crypto device
*
* @return RNG context
*/
struct rt_hwcrypto_ctx *rt_hwcrypto_rng_create(struct rt_hwcrypto_device *device);
/**
* @brief Destroy RNG Context
*
* @param ctx RNG context
*/
void rt_hwcrypto_rng_destroy(struct rt_hwcrypto_ctx *ctx);
/**
* @brief Setting RNG default devices
*
* @return RT_EOK on success.
*/
rt_err_t rt_hwcrypto_rng_default(struct rt_hwcrypto_device *device);
/**
* @brief Getting Random Numbers from RNG Context
*
* @param ctx RNG context
*
* @return Random number
*/
rt_uint32_t rt_hwcrypto_rng_update_ctx(struct rt_hwcrypto_ctx *ctx);
/**
* @brief Return a random number
*
* @return Random number
*/
rt_uint32_t rt_hwcrypto_rng_update(void);
#ifdef __cplusplus
}
#endif
#endif
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