85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
/* entropium.h */
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/*
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This file is part of the AVR-Crypto-Lib.
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Copyright (C) 2006-2015 Daniel Otte (bg@nerilex.org)
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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 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* File: entropium.h
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* Author: Daniel Otte
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* Date: 23.07.2006
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* License: GPL
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* Description: This file contains the declarations for the pseudo-random-number generator.
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**/
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/**
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* \file entropium.h
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* \author Daniel Otte
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* \date 23.07.2006
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* \license GPLv3 or later
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* \brief This file contains the declarations for the pseudo-random-number generator.
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**/
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#ifndef ENTROPIUM_H_
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#define ENTROPIUM_H_
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#include <stdint.h>
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/*
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* length in bits
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*/
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#define ENTROPIUM_RANDOMBLOCK_SIZE 32 /* bytes */
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/** \fn void entropium_addEntropy(unsigned length_b, const void *data)
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* \brief add entropy to the prng
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*
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* This function adds data to the internal entropy pool
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* \param length_b length of the data block in bits
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* \param data pointer to the data
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*/
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void entropium_addEntropy(unsigned length_b, const void *data);
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/** \fn void entropium_getRandomBlock(void *b)
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* \brief generate a fixed size block of random data
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*
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* This function writes 32 bytes of random extracted from the entropy pool
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* in the supplied buffer.
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* \param b buffer where the random data gets written
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*/
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void entropium_getRandomBlock(void *b);
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/** \fn uint8_t entropium_getRandomByte(void)
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* \brief get a single byte of random data
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*
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* This function utilizes a internal buffer which gets automatically filled
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* again.
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* \return a byte of random data
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*/
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uint8_t entropium_getRandomByte(void);
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/** \fn void entropium_fillBlockRandom(void *block, unsigned length_B)
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* \brief get a block of random data
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*
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* This function writes random data extracted from the entropy pool in the
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* supplied buffer. It shares a internal buffer with the
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* entropium_getRandomByte() function.
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* \param block pointer to the buffer where the random data goes
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* \param length_B number of bytes to be written to the buffer
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*/
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void entropium_fillBlockRandom(void *block, unsigned length_B);
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#endif /*PRNG_H_*/
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