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/* Copyright 2015 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef __EC_INCLUDE_TRNG_H
#define __EC_INCLUDE_TRNG_H
#include <common.h>
#include <stddef.h>
#include <stdint.h>
/**
* Initialize the true random number generator.
*
* Not supported by all platforms.
**/
void init_trng(void);
/**
* Shutdown the true random number generator.
*
* The opposite operation of init_trng(), disable the hardware resources
* used by the TRNG to save power.
*
* Not supported by all platforms.
**/
void exit_trng(void);
/**
* Retrieve a 32 bit random value.
*
* Not supported on all platforms.
**/
#ifndef HIDE_EC_STDLIB
uint32_t rand(void);
#endif
/**
* Output len random bytes into buffer.
*
* Not supported on all platforms.
**/
void rand_bytes(void *buffer, size_t len);
#endif /* __EC_INCLUDE_TRNG_H */
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