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 47 void 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 51 int 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__ */ 59