LXR linux/net/mac80211/aes

   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
  13static 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
  22static 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
  31static inline struct crypto_aead *
  32ieee80211_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
  38static 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 */
  44