1/*	$OpenBSD: blake2s.h,v 1.3 2023/02/03 18:31:16 miod Exp $	*/
2/*
3 * Copyright (C) 2015-2020 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
4 * Copyright (C) 2019-2020 Matt Dunwoodie <ncon@noconroy.net>.
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
19#include <sys/types.h>
20
21#ifndef _BLAKE2S_H_
22#define _BLAKE2S_H_
23
24enum blake2s_lengths {
25	BLAKE2S_BLOCK_SIZE = 64,
26	BLAKE2S_HASH_SIZE = 32,
27	BLAKE2S_KEY_SIZE = 32
28};
29
30struct blake2s_state {
31	uint32_t h[8];
32	uint32_t t[2];
33	uint32_t f[2];
34	uint8_t buf[BLAKE2S_BLOCK_SIZE];
35	unsigned int buflen;
36	unsigned int outlen;
37};
38
39void blake2s_init(struct blake2s_state *state, const size_t outlen);
40void blake2s_init_key(struct blake2s_state *state, const size_t outlen,
41		      const void *key, const size_t keylen);
42void blake2s_update(struct blake2s_state *state, const uint8_t *in, size_t inlen);
43void blake2s_final(struct blake2s_state *state, uint8_t *out);
44
45static inline void blake2s(
46    uint8_t *out, const uint8_t *in, const uint8_t *key,
47    const size_t outlen, const size_t inlen, const size_t keylen)
48{
49	struct blake2s_state state;
50
51	KASSERT((in != NULL || inlen == 0) &&
52		out != NULL && outlen <= BLAKE2S_HASH_SIZE &&
53		(key != NULL || keylen == 0) && keylen <= BLAKE2S_KEY_SIZE);
54
55	if (keylen)
56		blake2s_init_key(&state, outlen, key, keylen);
57	else
58		blake2s_init(&state, outlen);
59
60	blake2s_update(&state, in, inlen);
61	blake2s_final(&state, out);
62}
63
64void blake2s_hmac(uint8_t *out, const uint8_t *in, const uint8_t *key,
65    const size_t outlen, const size_t inlen, const size_t keylen);
66
67#endif /* _BLAKE2S_H_ */
68