cipher-chachapoly.h revision 262566 
1/* $OpenBSD: cipher-chachapoly.h,v 1.1 2013/11/21 00:45:44 djm Exp $ */
2
3/*
4 * Copyright (c) Damien Miller 2013 <djm@mindrot.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18#ifndef CHACHA_POLY_AEAD_H
19#define CHACHA_POLY_AEAD_H
20
21#include <sys/types.h>
22#include "chacha.h"
23#include "poly1305.h"
24
25#define CHACHA_KEYLEN	32 /* Only 256 bit keys used here */
26
27struct chachapoly_ctx {
28	struct chacha_ctx main_ctx, header_ctx;
29};
30
31void	chachapoly_init(struct chachapoly_ctx *cpctx,
32    const u_char *key, u_int keylen)
33    __attribute__((__bounded__(__buffer__, 2, 3)));
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