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 */
46
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