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// Copyright (c) 2019-2022 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_POLY1305_H
#define BITCOIN_CRYPTO_POLY1305_H
#include <cstdlib>
#include <stdint.h>
#define POLY1305_KEYLEN 32
#define POLY1305_TAGLEN 16
#define POLY1305_BLOCK_SIZE 16
namespace poly1305_donna {
// Based on the public domain implementation by Andrew Moon
// poly1305-donna-32.h from https://github.com/floodyberry/poly1305-donna
typedef struct {
uint32_t r[5];
uint32_t h[5];
uint32_t pad[4];
size_t leftover;
unsigned char buffer[POLY1305_BLOCK_SIZE];
unsigned char final;
} poly1305_context;
void poly1305_init(poly1305_context *st, const unsigned char key[32]) noexcept;
void poly1305_update(poly1305_context *st, const unsigned char *m, size_t bytes) noexcept;
void poly1305_finish(poly1305_context *st, unsigned char mac[16]) noexcept;
} // namespace poly1305_donna
void poly1305_auth(unsigned char out[POLY1305_TAGLEN], const unsigned char *m, size_t inlen,
const unsigned char key[POLY1305_KEYLEN]);
#endif // BITCOIN_CRYPTO_POLY1305_H
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