1/*	$NetBSD: cipher-chachapoly.h,v 1.3 2020/05/28 17:05:49 christos Exp $	*/
2/* $OpenBSD: cipher-chachapoly.h,v 1.5 2020/04/03 04:27:03 djm Exp $ */
3
4/*
5 * Copyright (c) Damien Miller 2013 <djm@mindrot.org>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19#ifndef CHACHA_POLY_AEAD_H
20#define CHACHA_POLY_AEAD_H
21
22#include <sys/types.h>
23#include "chacha.h"
24#include "poly1305.h"
25
26#define CHACHA_KEYLEN	32 /* Only 256 bit keys used here */
27
28struct chachapoly_ctx;
29
30struct chachapoly_ctx *chachapoly_new(const u_char *key, u_int keylen)
31    __attribute__((__bounded__(__buffer__, 1, 2)));
32void chachapoly_free(struct chachapoly_ctx *cpctx);
33
34int	chachapoly_crypt(struct chachapoly_ctx *cpctx, u_int seqnr,
35    u_char *dest, const u_char *src, u_int len, u_int aadlen, u_int authlen,
36    int do_encrypt);
37int	chachapoly_get_length(struct chachapoly_ctx *cpctx,
38    u_int *plenp, u_int seqnr, const u_char *cp, u_int len)
39    __attribute__((__bounded__(__buffer__, 4, 5)));
40
41#endif /* CHACHA_POLY_AEAD_H */
42