1 /* 2 * Copyright 2003-2004, Instant802 Networks, Inc. 3 * Copyright 2006, Devicescape Software, Inc. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 */ 9 10 #ifndef AES_CCM_H 11 #define AES_CCM_H 12 13 #include "aead_api.h" 14 15 #define CCM_AAD_LEN 32 16 17 static inline struct crypto_aead * 18 ieee80211_aes_key_setup_encrypt(const u8 key[], size_t key_len, size_t mic_len) 19 { 20 return aead_key_setup_encrypt("ccm(aes)", key, key_len, mic_len); 21 } 22 23 static inline int 24 ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm, 25 u8 *b_0, u8 *aad, u8 *data, 26 size_t data_len, u8 *mic) 27 { 28 return aead_encrypt(tfm, b_0, aad + 2, 29 be16_to_cpup((__be16 *)aad), 30 data, data_len, mic); 31 } 32 33 static inline int 34 ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm, 35 u8 *b_0, u8 *aad, u8 *data, 36 size_t data_len, u8 *mic) 37 { 38 return aead_decrypt(tfm, b_0, aad + 2, 39 be16_to_cpup((__be16 *)aad), 40 data, data_len, mic); 41 } 42 43 static inline void ieee80211_aes_key_free(struct crypto_aead *tfm) 44 { 45 return aead_key_free(tfm); 46 } 47 48 #endif /* AES_CCM_H */ 49