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/*
* poly1305.h - header file for Poly1305 implementation.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef FREEBL_POLY1305_H_
#define FREEBL_POLY1305_H_
#include "stddef.h"
typedef unsigned char poly1305_state[512];
/* Poly1305Init sets up |state| so that it can be used to calculate an
* authentication tag with the one-time key |key|. Note that |key| is a
* one-time key and therefore there is no `reset' method because that would
* enable several messages to be authenticated with the same key. */
extern void Poly1305Init(poly1305_state* state, const unsigned char key[32]);
/* Poly1305Update processes |in_len| bytes from |in|. It can be called zero or
* more times after poly1305_init. */
extern void Poly1305Update(poly1305_state* state, const unsigned char* in,
size_t inLen);
/* Poly1305Finish completes the poly1305 calculation and writes a 16 byte
* authentication tag to |mac|. */
extern void Poly1305Finish(poly1305_state* state, unsigned char mac[16]);
#endif /* FREEBL_POLY1305_H_ */
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