net/mac80211/aes_ccm.h

   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 */