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int get_rdrand64u(uint64_t *rng_val, unsigned int retry_count)#
Returns a single 64-bit value using RDRAND.
This function invokes RDRAND instruction to fetch a single 64-bit value.
On success, the value returned by RDRAND is written to rng_val.
On failure, the function retries invoking RDRAND retry_count times. Any failure after this, the function will return error.- Parameters:
rng_val – [out] Pointer to memory to store the value returned by RDRAND
retry_count – [in] Number of retry attempts
- Returns:
success or failure status of function call: SECRNG_SUCCESS, SECRNG_FAILURE, SECRNG_NOTSUPPORTED