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 12 #include "aead_api.h" 13 14 #define GCM_AAD_LEN 32 15 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 } 45 46 #endif /* AES_GCM_H */ 47