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77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
/**
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* \file entropy_poll.h
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*
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* \brief Platform-specific and custom entropy polling functions
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*
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* Copyright (C) 2006-2011, ARM Limited, All Rights Reserved
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*
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* This file is part of mbed TLS (http://www.polarssl.org)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef POLARSSL_ENTROPY_POLL_H
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#define POLARSSL_ENTROPY_POLL_H
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#include <string.h>
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#if !defined(POLARSSL_CONFIG_FILE)
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#include "config.h"
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#else
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#include POLARSSL_CONFIG_FILE
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Default thresholds for built-in sources
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*/
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#define ENTROPY_MIN_PLATFORM 128 /**< Minimum for platform source */
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#define ENTROPY_MIN_HAVEGE 128 /**< Minimum for HAVEGE */
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#define ENTROPY_MIN_HARDCLOCK 32 /**< Minimum for hardclock() */
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#if !defined(POLARSSL_NO_PLATFORM_ENTROPY)
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/**
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* \brief Platform-specific entropy poll callback
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*/
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int platform_entropy_poll( void *data,
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unsigned char *output, size_t len, size_t *olen );
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#endif
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#if defined(POLARSSL_HAVEGE_C)
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/**
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* \brief HAVEGE based entropy poll callback
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*
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* Requires an HAVEGE state as its data pointer.
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*/
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int havege_poll( void *data,
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unsigned char *output, size_t len, size_t *olen );
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#endif
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#if defined(POLARSSL_TIMING_C)
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/**
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* \brief hardclock-based entropy poll callback
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*/
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int hardclock_poll( void *data,
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unsigned char *output, size_t len, size_t *olen );
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* entropy_poll.h */
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