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/* $OpenBSD: poly1305.h,v 1.2 2020/07/22 13:54:30 tobhe Exp $ */
/*
* Public Domain poly1305 from Andrew Moon
*
* poly1305 implementation using 32 bit * 32 bit = 64 bit multiplication
* and 64 bit addition from https://github.com/floodyberry/poly1305-donna
*/
#ifndef _POLY1305_H_
#define _POLY1305_H_
#define poly1305_block_size 16
typedef struct poly1305_state {
unsigned long r[5];
unsigned long h[5];
unsigned long pad[4];
size_t leftover;
unsigned char buffer[poly1305_block_size];
unsigned char final;
} poly1305_state;
void poly1305_init(poly1305_state *, const unsigned char[32]);
void poly1305_update(poly1305_state *, const unsigned char *, size_t);
void poly1305_finish(poly1305_state *, unsigned char[16]);
#endif /* _POLY1305_H_ */
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