src/crypto/chacha20.h

   1 // Copyright (c) 2017 The Bitcoin Core developers
   2 // Distributed under the MIT software license, see the accompanying
   3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4
   5 #ifndef BITCOIN_CRYPTO_CHACHA20_H
   6 #define BITCOIN_CRYPTO_CHACHA20_H
   7
   8 #include <stdint.h>
   9 #include <stdlib.h>
  10
  11 /** A PRNG class for ChaCha20. */
  12 class ChaCha20
  13 {
  14 private:
  15     uint32_t input[16];
  16
  17 public:
  18     ChaCha20();
  19     ChaCha20(const unsigned char* key, size_t keylen);
  20     void SetKey(const unsigned char* key, size_t keylen);
  21     void SetIV(uint64_t iv);
  22     void Seek(uint64_t pos);
  23     void Output(unsigned char* output, size_t bytes);
  24 };
  25
  26 #endif // BITCOIN_CRYPTO_CHACHA20_H