1/* Copyright (c) 2018, 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_INTERNAL
16#define OPENSSL_HEADER_CHACHA_INTERNAL
17
18#include <openssl/base.h>
19
20#if defined(__cplusplus)
21extern "C" {
22#endif
23
24
25// CRYPTO_hchacha20 computes the HChaCha20 function, which should only be used
26// as part of XChaCha20.
27void CRYPTO_hchacha20(uint8_t out[32], const uint8_t key[32],
28 const uint8_t nonce[16]);
29
30#if !defined(OPENSSL_NO_ASM) && \
31 (defined(OPENSSL_X86) || defined(OPENSSL_X86_64) || \
32 defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64))
33#define CHACHA20_ASM
34
35// ChaCha20_ctr32 is defined in asm/chacha-*.pl.
36void ChaCha20_ctr32(uint8_t *out, const uint8_t *in, size_t in_len,
37 const uint32_t key[8], const uint32_t counter[4]);
38#endif
39
40
41#if defined(__cplusplus)
42} // extern C
43#endif
44
45#endif // OPENSSL_HEADER_CHACHA_INTERNAL
46