net/mac80211/aes_ccm.h

   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 */