1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright 2003-2004, Instant802 Networks, Inc. 4 * Copyright 2006, Devicescape Software, Inc. 5 */ 6 7 #ifndef AES_CCM_H 8 #define AES_CCM_H 9 10 #include "aead_api.h" 11 12 #define CCM_AAD_LEN 32 13 14 static inline struct crypto_aead * 15 ieee80211_aes_key_setup_encrypt(const u8 key[], size_t key_len, size_t mic_len) 16 { 17 return aead_key_setup_encrypt("ccm(aes)", key, key_len, mic_len); 18 } 19 20 static inline int 21 ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm, 22 u8 *b_0, u8 *aad, u8 *data, 23 size_t data_len, u8 *mic) 24 { 25 return aead_encrypt(tfm, b_0, aad + 2, 26 be16_to_cpup((__be16 *)aad), 27 data, data_len, mic); 28 } 29 30 static inline int 31 ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm, 32 u8 *b_0, u8 *aad, u8 *data, 33 size_t data_len, u8 *mic) 34 { 35 return aead_decrypt(tfm, b_0, aad + 2, 36 be16_to_cpup((__be16 *)aad), 37 data, data_len, mic); 38 } 39 40 static inline void ieee80211_aes_key_free(struct crypto_aead *tfm) 41 { 42 return aead_key_free(tfm); 43 } 44 45 #endif /* AES_CCM_H */ 46