Re: [PATCH] crypto: ccm - preserve the IV buffer

[Herbert Xu]

On Tue, Oct 31, 2017 at 03:42:35PM +0100, Romain Izard wrote:
> The IV buffer used during CCM operations is used twice, during both the
> hashing step and the ciphering step.
> 
> When using a hardware accelerator that updates the contents of the IV
> buffer at the end of ciphering operations, the value will be modified.
> In the decryption case, the subsequent setup of the hashing algorithm
> will interpret the updated IV instead of the original value, which can
> lead to out-of-bounds writes.
> 
> Reuse the idata buffer, only used in the hashing step, to preserve the
> IV's value during the ciphering step in the decryption case.
> 
> Signed-off-by: Romain Izard <romain.izard.pro@xxxxxxxxx>

Patch applied.  Thanks.
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
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