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/* Copyright (c) 2014, Google Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
#ifndef OPENSSL_HEADER_POLY1305_H
#define OPENSSL_HEADER_POLY1305_H
#include <openssl/base.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef unsigned char poly1305_state[512];
/* poly1305_init 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 CRYPTO_poly1305_init(poly1305_state* state, const uint8_t key[32]);
/* poly1305_update processes |in_len| bytes from |in|. It can be called zero or
* more times after poly1305_init. */
extern void CRYPTO_poly1305_update(poly1305_state* state, const uint8_t* in,
size_t in_len);
/* poly1305_finish completes the poly1305 calculation and writes a 16 byte
* authentication tag to |mac|. The |mac| address must be 16-byte aligned. */
extern void CRYPTO_poly1305_finish(poly1305_state* state, uint8_t mac[16]);
#if defined(__cplusplus)
} /* extern C */
#endif
#endif /* OPENSSL_HEADER_POLY1305_H */
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