1261287Sdes/* $OpenBSD: cipher-chachapoly.h,v 1.1 2013/11/21 00:45:44 djm Exp $ */
2261287Sdes
3261287Sdes/*
4261287Sdes * Copyright (c) Damien Miller 2013 <djm@mindrot.org>
5261287Sdes *
6261287Sdes * Permission to use, copy, modify, and distribute this software for any
7261287Sdes * purpose with or without fee is hereby granted, provided that the above
8261287Sdes * copyright notice and this permission notice appear in all copies.
9261287Sdes *
10261287Sdes * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11261287Sdes * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12261287Sdes * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13261287Sdes * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14261287Sdes * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15261287Sdes * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16261287Sdes * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17261287Sdes */
18261287Sdes#ifndef CHACHA_POLY_AEAD_H
19261287Sdes#define CHACHA_POLY_AEAD_H
20261287Sdes
21261287Sdes#include <sys/types.h>
22261287Sdes#include "chacha.h"
23261287Sdes#include "poly1305.h"
24261287Sdes
25261287Sdes#define CHACHA_KEYLEN	32 /* Only 256 bit keys used here */
26261287Sdes
27261287Sdesstruct chachapoly_ctx {
28261287Sdes	struct chacha_ctx main_ctx, header_ctx;
29261287Sdes};
30261287Sdes
31261287Sdesvoid	chachapoly_init(struct chachapoly_ctx *cpctx,
32261287Sdes    const u_char *key, u_int keylen)
33261287Sdes    __attribute__((__bounded__(__buffer__, 2, 3)));
34261287Sdesint	chachapoly_crypt(struct chachapoly_ctx *cpctx, u_int seqnr,
35261287Sdes    u_char *dest, const u_char *src, u_int len, u_int aadlen, u_int authlen,
36261287Sdes    int do_encrypt);
37261287Sdesint	chachapoly_get_length(struct chachapoly_ctx *cpctx,
38261287Sdes    u_int *plenp, u_int seqnr, const u_char *cp, u_int len)
39261287Sdes    __attribute__((__bounded__(__buffer__, 4, 5)));
40261287Sdes
41261287Sdes#endif /* CHACHA_POLY_AEAD_H */
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