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// Copyright (c) 2017 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_CRYPTO_CHACHA20_H
#define BITCOIN_CRYPTO_CHACHA20_H
#include <stdint.h>
#include <stdlib.h>
/** A PRNG class for ChaCha20. */
class ChaCha20
{
private:
uint32_t input[16];
public:
ChaCha20();
ChaCha20(const unsigned char* key, size_t keylen);
void SetKey(const unsigned char* key, size_t keylen);
void SetIV(uint64_t iv);
void Seek(uint64_t pos);
void Output(unsigned char* output, size_t bytes);
};
#endif // BITCOIN_CRYPTO_CHACHA20_H