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Re: [PATCH v2 1/2] mac80211: fils_aead: Use crypto api CMAC shash rather than bare cipher

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>  {
>  	u8 d[AES_BLOCK_SIZE], tmp[AES_BLOCK_SIZE];
> +	struct shash_desc *desc;
> +	u8 buf[sizeof(*desc) + crypto_shash_descsize(tfm)]
> CRYPTO_MINALIGN_ATTR;
>  	size_t i;
> -	const u8 *data[2];
> -	size_t data_len[2], data_elems;
> +
> +	desc = (struct shash_desc *)buf;
> +	desc->tfm = tfm;
> 
> +	crypto_shash_digest(desc, (u8[AES_BLOCK_SIZE]){},
> AES_BLOCK_SIZE, d);

That's an interesting expression in there. Can we name it into a real
variable? :)

I'm also slightly worried about stack usage now - do we know none of
this goes into an sg list eventually?

johannes



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