| Jouni Malinen | 00b9cfa | 2015-01-24 19:52:06 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014-2015, Qualcomm Atheros, Inc. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | */ |
| 8 | |
| 9 | #ifndef AES_GCM_H |
| 10 | #define AES_GCM_H |
| 11 | |
| Xiang Gao | 4133da7 | 2017-10-10 22:31:49 -0400 | [diff] [blame] | 12 | #include "aead_api.h" |
| Jouni Malinen | 00b9cfa | 2015-01-24 19:52:06 +0200 | [diff] [blame] | 13 | |
| Ard Biesheuvel | f4a067f | 2016-10-17 15:05:33 +0100 | [diff] [blame] | 14 | #define GCM_AAD_LEN 32 |
| 15 | |
| Xiang Gao | 4133da7 | 2017-10-10 22:31:49 -0400 | [diff] [blame] | 16 | static inline int ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm, |
| 17 | u8 *j_0, u8 *aad, u8 *data, |
| 18 | size_t data_len, u8 *mic) |
| 19 | { |
| 20 | return aead_encrypt(tfm, j_0, aad + 2, |
| 21 | be16_to_cpup((__be16 *)aad), |
| 22 | data, data_len, mic); |
| 23 | } |
| 24 | |
| 25 | static inline int ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm, |
| 26 | u8 *j_0, u8 *aad, u8 *data, |
| 27 | size_t data_len, u8 *mic) |
| 28 | { |
| 29 | return aead_decrypt(tfm, j_0, aad + 2, |
| 30 | be16_to_cpup((__be16 *)aad), |
| 31 | data, data_len, mic); |
| 32 | } |
| 33 | |
| 34 | static inline struct crypto_aead * |
| 35 | ieee80211_aes_gcm_key_setup_encrypt(const u8 key[], size_t key_len) |
| 36 | { |
| 37 | return aead_key_setup_encrypt("gcm(aes)", key, |
| 38 | key_len, IEEE80211_GCMP_MIC_LEN); |
| 39 | } |
| 40 | |
| 41 | static inline void ieee80211_aes_gcm_key_free(struct crypto_aead *tfm) |
| 42 | { |
| 43 | return aead_key_free(tfm); |
| 44 | } |
| Jouni Malinen | 00b9cfa | 2015-01-24 19:52:06 +0200 | [diff] [blame] | 45 | |
| 46 | #endif /* AES_GCM_H */ |