LXR linux/net/mac80211/aes

   1/*
   2 * Copyright 2014-2015, Qualcomm Atheros, Inc.
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License version 2 as
   6 * published by the Free Software Foundation.
   7 */
   8
   9#ifndef AES_GCM_H
  10#define AES_GCM_H
  11
  12#include "aead_api.h"
  13
  14#define GCM_AAD_LEN     32
  15
  16static inline int ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm,
  17                                            u8 *j_0, u8 *aad,  u8 *data,
  18                                            size_t data_len, u8 *mic)
  19{
  20        return aead_encrypt(tfm, j_0, aad + 2,
  21                            be16_to_cpup((__be16 *)aad),
  22                            data, data_len, mic);
  23}
  24
  25static inline int ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm,
  26                                            u8 *j_0, u8 *aad, u8 *data,
  27                                            size_t data_len, u8 *mic)
  28{
  29        return aead_decrypt(tfm, j_0, aad + 2,
  30                            be16_to_cpup((__be16 *)aad),
  31                            data, data_len, mic);
  32}
  33
  34static inline struct crypto_aead *
  35ieee80211_aes_gcm_key_setup_encrypt(const u8 key[], size_t key_len)
  36{
  37        return aead_key_setup_encrypt("gcm(aes)", key,
  38                                      key_len, IEEE80211_GCMP_MIC_LEN);
  39}
  40
  41static inline void ieee80211_aes_gcm_key_free(struct crypto_aead *tfm)
  42{
  43        return aead_key_free(tfm);
  44}
  45
  46#endif /* AES_GCM_H */
  47