1/* Copyright (c) 2014, Google Inc.
2 *
3 * Permission to use, copy, modify, and/or distribute this software for any
4 * purpose with or without fee is hereby granted, provided that the above
5 * copyright notice and this permission notice appear in all copies.
6 *
7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
10 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
14
15#ifndef OPENSSL_HEADER_CHACHA_H
16#define OPENSSL_HEADER_CHACHA_H
17
18#include <openssl/base.h>
19
20#ifdef  __cplusplus
21extern "C" {
22#endif
23
24
25/* CRYPTO_chacha_20 encrypts |in_len| bytes from |in| with the given key and
26 * nonce and writes the result to |out|, which may be equal to |in|. The
27 * initial block counter is specified by |counter|. */
28void CRYPTO_chacha_20(uint8_t *out, const uint8_t *in,
29                      size_t in_len, const uint8_t key[32],
30                      const uint8_t nonce[8], size_t counter);
31
32
33#if defined(__cplusplus)
34}  /* extern C */
35#endif
36
37#endif  /* OPENSSL_HEADER_CHACHA_H */
38