Re: [PATCH net] mptcp: use HMAC-SHA256 library instead of open-coded HMAC

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On Thu, Jul 31, 2025 at 11:27:50PM +0200, Matthieu Baerts wrote:
> Hi Eric,
> 
> On 31/07/2025 21:50, Eric Biggers wrote:
> > Now that there are easy-to-use HMAC-SHA256 library functions, use these
> > in net/mptcp/crypto.c instead of open-coding the HMAC algorithm.
> > 
> > Remove the WARN_ON_ONCE() for messages longer than SHA256_DIGEST_SIZE.
> > The new implementation handles all message lengths correctly.
> > 
> > The mptcp-crypto KUnit test still passes after this change.
> 
> Thank you for this patch! It is a good idea, and it looks good to me!
> 
> Reviewed-by: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
> 
> One small detail: net-next is currently closed [1], and I don't think
> this patch can be applied in -net. So except if you plan to take it in
> the libcrypto tree for 6.17 -- but that's probably strange -- what I can
> do is to apply it in the MPTCP tree, and send it to net-next later on.
> Is this OK for you?
> 
> [1] https://patchwork.hopto.org/net-next.html
> 
> Cheers,
> Matt
> --

The MPTCP tree (and then net-next) for 6.18 is fine.  I know this isn't
a great time to send patches, but I just happened to have some time now.

- Eric




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