| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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| 2 | /* |
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| 3 | * Copyright 2014-2015, Qualcomm Atheros, Inc. |
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| 4 | */ |
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| 5 | |
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| 6 | #ifndef AES_GCM_H |
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| 7 | #define AES_GCM_H |
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| 8 | |
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| 9 | #include "aead_api.h" |
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| 10 | |
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| 11 | #define GCM_AAD_LEN 32 |
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| 12 | |
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| 13 | static inline int ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm, |
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| 14 | u8 *j_0, u8 *aad, u8 *data, |
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| 15 | size_t data_len, u8 *mic) |
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| 16 | { |
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| 17 | return aead_encrypt(tfm, b_0: j_0, aad: aad + 2, |
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| 18 | be16_to_cpup(p: (__be16 *)aad), |
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| 19 | data, data_len, mic); |
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| 20 | } |
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| 21 | |
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| 22 | static inline int ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm, |
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| 23 | u8 *j_0, u8 *aad, u8 *data, |
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| 24 | size_t data_len, u8 *mic) |
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| 25 | { |
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| 26 | return aead_decrypt(tfm, b_0: j_0, aad: aad + 2, |
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| 27 | be16_to_cpup(p: (__be16 *)aad), |
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| 28 | data, data_len, mic); |
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| 29 | } |
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| 30 | |
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| 31 | static inline struct crypto_aead * |
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| 32 | ieee80211_aes_gcm_key_setup_encrypt(const u8 key[], size_t key_len) |
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| 33 | { |
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| 34 | return aead_key_setup_encrypt(alg: "gcm(aes)" , key, |
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| 35 | key_len, IEEE80211_GCMP_MIC_LEN); |
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| 36 | } |
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| 37 | |
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| 38 | static inline void ieee80211_aes_gcm_key_free(struct crypto_aead *tfm) |
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| 39 | { |
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| 40 | return aead_key_free(tfm); |
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| 41 | } |
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| 42 | |
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| 43 | #endif /* AES_GCM_H */ |
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| 44 | |
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