1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright 2014-2015, Qualcomm Atheros, Inc. 4 */ 5 6 #ifndef AES_GCM_H 7 #define AES_GCM_H 8 9 #include "aead_api.h" 10 11 #define GCM_AAD_LEN 32 12 13 static inline int ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm, 14 u8 *j_0, u8 *aad, u8 *data, 15 size_t data_len, u8 *mic) 16 { 17 return aead_encrypt(tfm, j_0, aad + 2, 18 be16_to_cpup((__be16 *)aad), 19 data, data_len, mic); 20 } 21 22 static inline int ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm, 23 u8 *j_0, u8 *aad, u8 *data, 24 size_t data_len, u8 *mic) 25 { 26 return aead_decrypt(tfm, j_0, aad + 2, 27 be16_to_cpup((__be16 *)aad), 28 data, data_len, mic); 29 } 30 31 static inline struct crypto_aead * 32 ieee80211_aes_gcm_key_setup_encrypt(const u8 key[], size_t key_len) 33 { 34 return aead_key_setup_encrypt("gcm(aes)", key, 35 key_len, IEEE80211_GCMP_MIC_LEN); 36 } 37 38 static inline void ieee80211_aes_gcm_key_free(struct crypto_aead *tfm) 39 { 40 return aead_key_free(tfm); 41 } 42 43 #endif /* AES_GCM_H */ 44