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 */
44
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