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| 5496 | leency | 1 | /** |
| 2 | * \file entropy_poll.h |
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| 3 | * |
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| 4 | * \brief Platform-specific and custom entropy polling functions |
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| 5 | * |
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| 6 | * Copyright (C) 2006-2011, Brainspark B.V. |
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| 7 | * |
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| 8 | * This file is part of PolarSSL (http://www.polarssl.org) |
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| 9 | * Lead Maintainer: Paul Bakker |
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| 10 | * |
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| 11 | * All rights reserved. |
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| 12 | * |
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| 13 | * This program is free software; you can redistribute it and/or modify |
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| 14 | * it under the terms of the GNU General Public License as published by |
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| 15 | * the Free Software Foundation; either version 2 of the License, or |
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| 16 | * (at your option) any later version. |
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| 17 | * |
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| 18 | * This program is distributed in the hope that it will be useful, |
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| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 21 | * GNU General Public License for more details. |
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| 22 | * |
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| 23 | * You should have received a copy of the GNU General Public License along |
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| 24 | * with this program; if not, write to the Free Software Foundation, Inc., |
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| 25 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
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| 26 | */ |
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| 27 | #ifndef POLARSSL_ENTROPY_POLL_H |
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| 28 | #define POLARSSL_ENTROPY_POLL_H |
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| 29 | |||
| 30 | #include |
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| 31 | |||
| 32 | #include "config.h" |
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| 33 | |||
| 34 | #ifdef __cplusplus |
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| 35 | extern "C" { |
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| 36 | #endif |
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| 37 | |||
| 38 | /* |
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| 39 | * Default thresholds for built-in sources |
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| 40 | */ |
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| 41 | #define ENTROPY_MIN_PLATFORM 128 /**< Minimum for platform source */ |
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| 42 | #define ENTROPY_MIN_HAVEGE 128 /**< Minimum for HAVEGE */ |
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| 43 | #define ENTROPY_MIN_HARDCLOCK 32 /**< Minimum for hardclock() */ |
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| 44 | |||
| 45 | #if !defined(POLARSSL_NO_PLATFORM_ENTROPY) |
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| 46 | /** |
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| 47 | * \brief Platform-specific entropy poll callback |
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| 48 | */ |
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| 49 | int platform_entropy_poll( void *data, |
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| 50 | unsigned char *output, size_t len, size_t *olen ); |
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| 51 | #endif |
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| 52 | |||
| 53 | #if defined(POLARSSL_HAVEGE_C) |
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| 54 | /** |
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| 55 | * \brief HAVEGE based entropy poll callback |
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| 56 | * |
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| 57 | * Requires an HAVEGE state as its data pointer. |
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| 58 | */ |
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| 59 | int havege_poll( void *data, |
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| 60 | unsigned char *output, size_t len, size_t *olen ); |
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| 61 | #endif |
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| 62 | |||
| 63 | #if defined(POLARSSL_TIMING_C) |
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| 64 | /** |
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| 65 | * \brief hardclock-based entropy poll callback |
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| 66 | */ |
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| 67 | int hardclock_poll( void *data, |
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| 68 | unsigned char *output, size_t len, size_t *olen ); |
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| 69 | #endif |
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| 70 | |||
| 71 | #ifdef __cplusplus |
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| 72 | } |
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| 73 | #endif |
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| 74 | |||
| 75 | #endif /* entropy_poll.h */ |