1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2012, Jouni Malinen <j@w1.fi>
5 * All rights reserved.
6 *
7 * Galois/Counter Mode (GCM) and GMAC with AES
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29#ifndef __IEEE80211_CRYPTO_GCM_H__
30#define __IEEE80211_CRYPTO_GCM_H__
31
32#if defined(__KERNEL__) || defined(_KERNEL)
33
34#include <crypto/rijndael/rijndael.h>
35
36#define AES_BLOCK_LEN 16
37
38/*
39 * buffer is 2x the AES_BLOCK_LEN, but the AAD contents may be variable
40 * and are padded.
41 */
42#define GCM_AAD_LEN (AES_BLOCK_LEN * 2)
43
44/* GCMP is always 128 bit / 16 byte MIC */
45#define GCMP_MIC_LEN 16
46
47void ieee80211_crypto_aes_gcm_ae(rijndael_ctx *aes, const uint8_t *iv,
48 size_t iv_len, const uint8_t *plain, size_t plain_len,
49 const uint8_t *aad, size_t aad_len, uint8_t *crypt, uint8_t *tag);
50
51int ieee80211_crypto_aes_gcm_ad(rijndael_ctx *aes, const uint8_t *iv,
52 size_t iv_len, const uint8_t *crypt, size_t crypt_len,
53 const uint8_t *aad, size_t aad_len, const uint8_t *tag,
54 uint8_t *plain);
55
56#endif /* __KERNEL__ */
57
58#endif /* __IEEE80211_CRYPTO_GCM_H__ */