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Now that AES-CMAC has a library API, convert the mac80211 AES-CMAC packet authentication code to use it instead of a "cmac(aes)" crypto_shash. This has multiple benefits, such as: - It's faster. The AES-CMAC code is now called directly, without unnecessary overhead such as indirect calls. - MAC calculation can no longer fail. - The AES-CMAC key struct is now a fixed size, allowing it to be embedded directly into 'struct ieee80211_key' rather than using a separate allocation. Note that although this increases the size of the 'u.cmac' field of 'struct ieee80211_key', it doesn't cause it to exceed the size of the largest variant of the union 'u'. Therefore, the size of 'struct ieee80211_key' itself is unchanged. Acked-by: Johannes Berg <johannes@sipsolutions.net> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20260218213501.136844-15-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>
16 lines
335 B
C
16 lines
335 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright 2008, Jouni Malinen <j@w1.fi>
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*/
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#ifndef AES_CMAC_H
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#define AES_CMAC_H
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#include <crypto/aes-cbc-macs.h>
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void ieee80211_aes_cmac(const struct aes_cmac_key *key, const u8 *aad,
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const u8 *data, size_t data_len, u8 *mic,
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unsigned int mic_len);
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#endif /* AES_CMAC_H */
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