100b9cfa3SJouni Malinen /* 200b9cfa3SJouni Malinen * Copyright 2014-2015, Qualcomm Atheros, Inc. 300b9cfa3SJouni Malinen * 400b9cfa3SJouni Malinen * This program is free software; you can redistribute it and/or modify 500b9cfa3SJouni Malinen * it under the terms of the GNU General Public License version 2 as 600b9cfa3SJouni Malinen * published by the Free Software Foundation. 700b9cfa3SJouni Malinen */ 800b9cfa3SJouni Malinen 900b9cfa3SJouni Malinen #ifndef AES_GCM_H 1000b9cfa3SJouni Malinen #define AES_GCM_H 1100b9cfa3SJouni Malinen 124133da73SXiang Gao #include "aead_api.h" 1300b9cfa3SJouni Malinen 14f4a067f9SArd Biesheuvel #define GCM_AAD_LEN 32 15f4a067f9SArd Biesheuvel 164133da73SXiang Gao static inline int ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm, 174133da73SXiang Gao u8 *j_0, u8 *aad, u8 *data, 184133da73SXiang Gao size_t data_len, u8 *mic) 194133da73SXiang Gao { 204133da73SXiang Gao return aead_encrypt(tfm, j_0, aad + 2, 214133da73SXiang Gao be16_to_cpup((__be16 *)aad), 224133da73SXiang Gao data, data_len, mic); 234133da73SXiang Gao } 244133da73SXiang Gao 254133da73SXiang Gao static inline int ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm, 264133da73SXiang Gao u8 *j_0, u8 *aad, u8 *data, 274133da73SXiang Gao size_t data_len, u8 *mic) 284133da73SXiang Gao { 294133da73SXiang Gao return aead_decrypt(tfm, j_0, aad + 2, 304133da73SXiang Gao be16_to_cpup((__be16 *)aad), 314133da73SXiang Gao data, data_len, mic); 324133da73SXiang Gao } 334133da73SXiang Gao 344133da73SXiang Gao static inline struct crypto_aead * 354133da73SXiang Gao ieee80211_aes_gcm_key_setup_encrypt(const u8 key[], size_t key_len) 364133da73SXiang Gao { 374133da73SXiang Gao return aead_key_setup_encrypt("gcm(aes)", key, 384133da73SXiang Gao key_len, IEEE80211_GCMP_MIC_LEN); 394133da73SXiang Gao } 404133da73SXiang Gao 414133da73SXiang Gao static inline void ieee80211_aes_gcm_key_free(struct crypto_aead *tfm) 424133da73SXiang Gao { 434133da73SXiang Gao return aead_key_free(tfm); 444133da73SXiang Gao } 4500b9cfa3SJouni Malinen 4600b9cfa3SJouni Malinen #endif /* AES_GCM_H */ 47