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common: expose true random number generator API

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When supported, the true random number generator provide to API calls,
to initialize it and to retrieve a random number.

BRANCH=none
BUG=chrome-os-partner:43025
TEST=with other patches in place TPM2 gets proper random numbers
     stream.

Change-Id: I11effdf6f81ca76581a354218203620708195b2b
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/306688
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
This commit is contained in:
Vadim Bendebury
2015-10-16 14:32:33 -07:00
committed by chrome-bot
parent 0686445847
commit 95fdecb7b4
1 changed files with 22 additions and 0 deletions
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22
include/trng.h Normal file
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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
/**
* Initialize the true random number generator.
*
* Not supported by all platforms.
**/
void init_trng(void);
/**
* Retrieve a 32 bit random value.
*
* Not supported on all platforms.
**/
uint32_t rand(void);
#endif /* __EC_INCLUDE_TRNG_H */