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RNG API 参考

RNG

typedef wm_hal_rng_cfg_t wm_drv_rng_cfg_t

wm_device_t *wm_drv_rng_init(const char *dev_name)

Initialize RNG driver.

备注

This API must be called before all other RNG API can be called

参数:

dev_name – RNG device name

返回:

• NULL: failed

• others: RNG driver device

int wm_drv_rng_deinit(wm_device_t *dev)

Release access to GPSEC hardware and deinitialize RNG driver.

参数:

dev – RNG driver device

返回:

• WM_ERR_SUCCESS: succeed

• WM_ERR_INVALID_PARAM: invalid argument

• others: failed

uint32_t wm_drv_rng_read(wm_device_t *dev)

Get one random from hardware RNG.

参数:

dev – [in] Pointer to the RNG device structure.

返回:

Random value

int wm_drv_rng_read_bytes(wm_device_t *dev, void *buf, uint32_t len)

Fill a buffer with random from hardware RNG.

参数:

• dev – [in] Pointer to the RNG device structure.

• buf – [in] Pointer to buffer to fill with random numbers.

• len – [in] Length of buffer in bytes

返回:

• WM_ERR_SUCCESS: succeed

• WM_ERR_INVALID_PARAM: invalid argument

• others: failed

int wm_drv_fill_random(void *buf, uint32_t len)

Fill a buffer with random from hardware RNG.

参数:

• buf – [in] Pointer to buffer to fill with random numbers.

• len – [in] Length of buffer in bytes

返回:

• WM_ERR_SUCCESS: succeed

• others: failed