mirror of
https://github.com/taigrr/arduinolibs
synced 2025-01-18 04:33:12 -08:00
72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
/*
|
|
* Copyright (C) 2015 Southern Storm Software, Pty Ltd.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included
|
|
* in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
* DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef CRYPTO_RNG_h
|
|
#define CRYPTO_RNG_h
|
|
|
|
#include <inttypes.h>
|
|
#include <stddef.h>
|
|
|
|
class NoiseSource;
|
|
|
|
class RNGClass
|
|
{
|
|
public:
|
|
RNGClass();
|
|
~RNGClass();
|
|
|
|
void begin(const char *tag, int eepromAddress);
|
|
void addNoiseSource(NoiseSource &source);
|
|
|
|
void setAutoSaveTime(uint16_t minutes);
|
|
|
|
void rand(uint8_t *data, size_t len);
|
|
bool available(size_t len) const;
|
|
|
|
void stir(const uint8_t *data, size_t len, unsigned int credit = 0);
|
|
|
|
void save();
|
|
|
|
void loop();
|
|
|
|
void destroy();
|
|
|
|
static const int SEED_SIZE = 49;
|
|
|
|
private:
|
|
uint32_t block[16];
|
|
uint32_t stream[16];
|
|
int address;
|
|
uint16_t credits : 15;
|
|
uint16_t firstSave : 1;
|
|
unsigned long timer;
|
|
unsigned long timeout;
|
|
NoiseSource *noiseSources[4];
|
|
uint8_t count;
|
|
|
|
void rekey();
|
|
};
|
|
|
|
extern RNGClass RNG;
|
|
|
|
#endif
|