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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 8774 | rgimad | 1 | /** |
| 2 | * \file havege.h |
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| 3 | * |
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| 4 | * \brief HAVEGE: HArdware Volatile Entropy Gathering and Expansion |
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| 5 | */ |
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| 6 | /* |
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| 7 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved |
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| 8 | * SPDX-License-Identifier: GPL-2.0 |
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| 9 | * |
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| 10 | * This program is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License as published by |
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| 12 | * the Free Software Foundation; either version 2 of the License, or |
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| 13 | * (at your option) any later version. |
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| 14 | * |
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| 15 | * This program is distributed in the hope that it will be useful, |
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| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 18 | * GNU General Public License for more details. |
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| 19 | * |
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| 20 | * You should have received a copy of the GNU General Public License along |
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| 21 | * with this program; if not, write to the Free Software Foundation, Inc., |
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| 22 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
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| 23 | * |
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| 24 | * This file is part of mbed TLS (https://tls.mbed.org) |
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| 25 | */ |
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| 26 | #ifndef MBEDTLS_HAVEGE_H |
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| 27 | #define MBEDTLS_HAVEGE_H |
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| 28 | |||
| 29 | #if !defined(MBEDTLS_CONFIG_FILE) |
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| 30 | #include "config.h" |
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| 31 | #else |
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| 32 | #include MBEDTLS_CONFIG_FILE |
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| 33 | #endif |
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| 34 | |||
| 35 | #include |
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| 36 | |||
| 37 | #define MBEDTLS_HAVEGE_COLLECT_SIZE 1024 |
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| 38 | |||
| 39 | #ifdef __cplusplus |
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| 40 | extern "C" { |
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| 41 | #endif |
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| 42 | |||
| 43 | /** |
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| 44 | * \brief HAVEGE state structure |
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| 45 | */ |
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| 46 | typedef struct mbedtls_havege_state |
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| 47 | { |
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| 48 | int PT1, PT2, offset[2]; |
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| 49 | int pool[MBEDTLS_HAVEGE_COLLECT_SIZE]; |
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| 50 | int WALK[8192]; |
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| 51 | } |
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| 52 | mbedtls_havege_state; |
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| 53 | |||
| 54 | /** |
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| 55 | * \brief HAVEGE initialization |
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| 56 | * |
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| 57 | * \param hs HAVEGE state to be initialized |
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| 58 | */ |
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| 59 | void mbedtls_havege_init( mbedtls_havege_state *hs ); |
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| 60 | |||
| 61 | /** |
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| 62 | * \brief Clear HAVEGE state |
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| 63 | * |
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| 64 | * \param hs HAVEGE state to be cleared |
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| 65 | */ |
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| 66 | void mbedtls_havege_free( mbedtls_havege_state *hs ); |
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| 67 | |||
| 68 | /** |
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| 69 | * \brief HAVEGE rand function |
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| 70 | * |
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| 71 | * \param p_rng A HAVEGE state |
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| 72 | * \param output Buffer to fill |
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| 73 | * \param len Length of buffer |
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| 74 | * |
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| 75 | * \return 0 |
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| 76 | */ |
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| 77 | int mbedtls_havege_random( void *p_rng, unsigned char *output, size_t len ); |
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| 78 | |||
| 79 | #ifdef __cplusplus |
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| 80 | } |
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| 81 | #endif |
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| 82 | |||
| 83 | #endif /* havege.h */ |