net/mac80211/aes_gcm.h

   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 */