| /* 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 <stddef.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); |
| |
| /** |
| * Output len random bytes into buffer. |
| * |
| * Not supported on all platforms. |
| **/ |
| void rand_bytes(void *buffer, size_t len); |
| |
| #endif /* __EC_INCLUDE_TRNG_H */ |